Yangzhou Jingcheng Electronics Co., Ltd. is professional in designing, developing, producing, sales and service of RF (Radio Frequency) coaxial connectors.
Modern radio-frequency systems depend on small, precisely manufactured interconnection components. Although an RF connector may occupy only a small portion of a circuit or enclosure, its mechanical accuracy, impedance consistency, surface finish, and mounting quality can significantly affect the performance of the complete system. A connector that introduces excessive reflection, inconsistent contact pressure, or unnecessary mechanical stress may reduce signal integrity, shorten service life, and increase maintenance requirements.
The JC3.660.481 SMA-KFD-45 is an SMA micro-strip connector designed for compact RF assemblies that require a dependable transition between a printed circuit board and a coaxial interface. It belongs to the SMA Micro-strip Connectors category and is suitable for applications in which limited board space, controlled RF performance, and repeatable installation are important. Its value is not limited to the connector body itself. The connector must be considered as part of a complete interconnection system that includes the PCB transmission line, solder joints, housing, mating cable, and surrounding grounding structure.
This article examines the product’s role in RF design, its principal advantages, recommended application practices, manufacturing considerations, inspection requirements, and the technical strengths of the manufacturer behind the product. It also explains how a specialized RF connector producer can support customers with standard parts, customized versions, and related products such as adapters, cable assemblies, attenuators, terminal loads, antennas, and coaxial lightning protectors.
JC3.660.481 SMA-KFD-45
Content
The JC3.660.481 SMA-KFD-45 is identified as an SMA micro-strip connector. SMA is one of the most widely used threaded RF interface families for compact equipment, laboratory instruments, wireless communication devices, antenna systems, test fixtures, and electronic modules. The interface is valued for its relatively small size, secure threaded coupling, broad availability, and suitability for high-frequency signal transmission when properly designed and assembled.
The micro-strip configuration is especially useful when an RF signal must travel from a PCB trace to an external coaxial cable or panel-mounted connection. Instead of using a long internal cable, the connector is positioned directly at the board edge or at a defined board location. This approach can shorten the RF path, reduce the number of transitions, simplify assembly, and help designers create a more compact product enclosure.
The “45” designation in the model name indicates that the product configuration incorporates a 45-degree orientation or geometry. The exact interpretation should always be verified against the approved product drawing, because connector model codes can represent different mechanical arrangements according to a manufacturer’s naming system. In practical design work, the relevant dimensions include the mounting position, orientation, center contact location, ground leg arrangement, recommended PCB footprint, mating interface, and allowable board thickness.
The connector is intended for integration with a micro-strip circuit. This means that electrical performance depends on more than the nominal connector specification. The PCB dielectric, copper thickness, trace width, ground-plane arrangement, soldering method, enclosure geometry, and transition design all influence the final result. A well-designed connector can support excellent RF performance, but the board layout and assembly process must also be controlled.
The product’s principal characteristics can be summarized as an SMA coaxial interface, a PCB-oriented micro-strip configuration, a compact form factor, a 45-degree arrangement, and suitability for RF equipment requiring a board-to-coaxial transition. These characteristics make it appropriate for designs where the external cable must leave the PCB at a controlled angle or where a straight vertical connector would be unsuitable for the enclosure.
A 45-degree configuration can offer mechanical and packaging advantages. It may reduce the bending force placed on a connected coaxial cable, allow the cable to follow the enclosure contour, and help position the cable away from adjacent components. In compact devices, this can simplify cable routing and reduce the risk of interference with shielding covers, batteries, heat sinks, or other circuit boards.
The connector can also help standardize product construction. Instead of creating a unique cable exit method for each enclosure, an engineering team can use a defined SMA interface and a repeatable PCB footprint. This supports consistent production, easier testing, and more predictable field replacement.
| Item | Product Information | Engineering Significance |
|---|---|---|
| Product model | JC3.660.481 SMA-KFD-45 | Provides a defined reference for drawings, quotations, purchasing, and production control |
| Connector family | SMA | Supports a widely recognized threaded RF mating interface |
| Product category | SMA Micro-strip Connectors | Designed for PCB-based coaxial signal transitions |
| Orientation | 45-degree configuration indicated by the model designation | Can assist cable routing and enclosure integration |
| Primary application | RF and microwave electronic assemblies | Suitable for communication, test, antenna, and instrumentation equipment |
| Installation focus | PCB footprint, soldering, grounding, and mechanical retention | Requires controlled board layout and assembly practices |
| Customization potential | To be confirmed according to technical drawing and project requirements | May support project-specific mechanical or electrical adaptations |
In an RF circuit, every transition can influence signal quality. A transition from a PCB micro-strip trace to a coaxial connector involves a change in geometry, dielectric environment, conductor arrangement, and current distribution. If these changes are abrupt or poorly controlled, they can cause impedance discontinuity, return loss, insertion loss, and unwanted electromagnetic radiation.
A purpose-designed micro-strip connector provides a more controlled transition than an improvised wire connection or a general-purpose terminal. The connector’s center contact is positioned to meet the RF trace, while the ground contacts or mounting structure establish the return-current path. When the connector is matched with a suitable PCB footprint, the signal can move from the board into the coaxial interface with fewer discontinuities.
This is particularly important in systems operating at elevated frequencies. At lower frequencies, a mechanically simple interconnection may appear acceptable during basic functional testing. As frequency increases, however, small dimensional variations become electrically significant. The length of a center contact, the position of a ground tab, the thickness of solder, and the distance between the signal path and the housing can all influence performance.
The micro-strip approach also supports a compact signal path. A shorter transition usually means fewer opportunities for loss, coupling, and mechanical movement. It may also simplify electromagnetic simulation because the connector and PCB footprint can be represented as a defined transition structure during the design stage.
Before placing the connector, the designer should obtain the latest mechanical drawing, recommended land pattern, material information, mating-interface information, and relevant electrical data. The PCB footprint should not be created only from a visual measurement of the component. The position of the center conductor, ground pads, solder mask openings, mounting holes, and board edge must be controlled according to the manufacturer’s approved dimensions.
The micro-strip trace should approach the connector with a consistent width and a smooth geometry. Sudden changes in trace width, unnecessary bends, and gaps in the ground plane can create local impedance changes. If a transition requires a taper, the taper should be designed deliberately rather than left to an arbitrary copper shape.
The ground plane should extend sufficiently around the connector transition. Ground vias may be used near the signal path to control the return-current route and reduce unwanted radiation, provided that they do not violate the manufacturer’s footprint or create assembly problems. The final via arrangement depends on the PCB stack-up, target impedance, operating frequency, and mechanical clearance.
Board thickness is another important factor. Some connectors are optimized for a particular range of PCB thicknesses, while others require specific edge positioning or support. If the board is too thin, too thick, or incorrectly positioned, the center contact may not align with the micro-strip trace and the mechanical solder joints may be weakened.
The JC3.660.481 SMA-KFD-45 offers several practical advantages compared with less specialized connection methods. These advantages arise from its SMA interface, PCB-oriented construction, defined orientation, and suitability for controlled production.
An SMA threaded interface provides a more secure connection than many push-fit or loosely retained alternatives. The threaded coupling helps maintain contact pressure and reduces the risk of accidental disconnection caused by vibration, cable movement, or routine handling. This is valuable in test equipment, outdoor radio units, antenna assemblies, and systems that may be serviced repeatedly.
Threaded mating also provides a predictable installation method. Operators can use a specified tightening procedure and appropriate torque tool, helping reduce variation between assemblies. The connector should not be over-tightened, because excessive torque can damage threads, deform the interface, or transfer unnecessary stress to the PCB.
A board-mounted micro-strip connector can occupy less space than an arrangement using a separate bulkhead connector, internal coaxial cable, and additional board-side termination. Fewer components can reduce assembly time and simplify the enclosure. The compact structure is especially beneficial in wireless modules, sensor systems, portable instruments, and multi-board assemblies.
The 45-degree orientation can provide a better cable exit direction than a straight connector. This may help keep the cable within a defined bend radius, reduce pressure against the enclosure wall, and make more efficient use of limited internal space. It can also improve service accessibility by placing the mating interface at a more convenient angle.
Internal coaxial cables introduce additional connectors, solder joints, clamps, and routing requirements. Each additional element can contribute to loss, assembly variation, and potential failure. A direct PCB transition can eliminate some of these elements and make the signal path easier to inspect.
Reduced cabling does not automatically guarantee better RF performance, because the board transition still requires careful design. However, it can reduce the number of uncontrolled variables in the assembly. A shorter path is often easier to model, manufacture, test, and troubleshoot.
A specialized connector with a defined footprint is easier to standardize than manually formed wire connections. The product can be placed using controlled assembly equipment, soldered according to a process specification, and inspected using established criteria. This helps manufacturers achieve more consistent quality across production batches.
Repeatability is especially important when the same RF module is produced in high volume. Small variations in cable length, conductor position, or solder shape can cause measurable differences in high-frequency performance. A stable connector design, combined with controlled PCB fabrication and assembly, helps reduce this variation.
SMA is a widely recognized interface family. Its availability across cables, adapters, test equipment, antennas, attenuators, and loads makes it easier for engineers to build complete test and integration systems. A designer can use standard mating components during development while retaining the option to specify customized cables or mechanical adaptations for production.
Compared with an obscure or highly application-specific interface, a standard SMA connection may simplify procurement and laboratory validation. It can also support more convenient field replacement, provided that the replacement component follows the approved mechanical and electrical requirements.
RF connector performance depends heavily on manufacturing discipline. A connector may have an appropriate basic design, but poor material preparation, inaccurate machining, inconsistent plating, or weak solderability can undermine the final product. For this reason, manufacturing capability is a major factor when selecting an RF connector supplier.
Yangzhou Jingcheng Electronics Co., Ltd. was founded in 1999 and specializes in the design, development, production, sales, and service of RF coaxial connectors and related products. The company offers more than 2,000 product types, including coaxial connectors, adapters, reverse polarity connectors, coaxial lightning protectors, high-frequency cables and cable assemblies, attenuators, terminal loads, antennas, and other RF interconnection products.
This product range indicates experience across multiple RF interfaces and application requirements. It also allows customers to source related components from one technical partner. For example, a project using the JC3.660.481 SMA-KFD-45 may also require an SMA cable assembly, a panel adapter, a calibration load, a lightning protection device, or an antenna connection. A supplier with a broad portfolio can help maintain interface consistency across these components.
Material selection affects electrical conductivity, mechanical stability, corrosion resistance, solderability, and service life. RF connector manufacturers generally need to evaluate the properties of the body, center contact, ground structure, insulation components, and surface finishes as a complete system.
The connector body must provide dimensional stability and adequate mechanical strength. The center contact must maintain reliable electrical contact while being suitable for the required mating cycles. Insulating components must maintain the intended separation and support the contact without introducing unacceptable high-frequency discontinuity.
Surface treatment is also important. Plating can influence contact resistance, wear resistance, corrosion resistance, solderability, and appearance. The appropriate finish depends on the interface, environmental exposure, mating requirements, and customer specification. Production control should verify coating consistency and ensure that the finished contact area is not contaminated or damaged.
SMA connectors contain small features that require accurate machining or forming. Thread dimensions, contact alignment, shoulder geometry, mounting surfaces, and board-contact locations must remain within the tolerances defined by the product drawing. Inconsistent dimensions can cause difficult mating, excessive mechanical force, poor electrical contact, or unreliable PCB installation.
Advanced manufacturing equipment supports more consistent production of these features. CNC machining, automated forming, controlled deburring, and suitable tooling can help maintain repeatability. Tool wear must also be monitored, because gradual changes in cutting tools or forming dies can affect dimensions over time.
For a 45-degree micro-strip connector, orientation control is particularly important. The angular position must be maintained so that the cable exits in the intended direction and the PCB contact points align with the board footprint. A small angular error may create enclosure interference or increase cable stress.
Connector assembly involves more than joining individual parts. The position of the center contact, dielectric support, body, and ground structure must be controlled so that the completed component meets its mechanical and electrical requirements. Cleanliness is essential because particles, oil, or residue can affect contact performance and solderability.
For PCB assembly, solderability is a key consideration. The connector should be compatible with the intended soldering process, whether that process includes manual soldering, selective soldering, reflow-related operations, or another controlled method. The customer should follow the supplier’s recommended thermal profile and soldering instructions.
Excessive solder can change the local RF geometry, while insufficient solder can weaken the mechanical and electrical connection. The solder joint should provide adequate wetting and coverage without bridging adjacent areas or obstructing the mating interface. Inspection should include both visual criteria and, where necessary, cross-sectional analysis or process validation.
A professional RF connector manufacturer requires inspection at multiple stages. Incoming material inspection helps verify that raw materials and purchased components meet requirements. In-process inspection monitors machining, forming, plating, assembly, and dimensional accuracy. Final inspection confirms that finished products meet the approved specifications before shipment.
Typical inspection categories may include dimensional measurement, visual appearance, thread quality, contact alignment, plating condition, solderability, continuity, insulation resistance, and mechanical strength. Depending on the product and customer requirements, RF performance may also be evaluated using suitable test fixtures and network-analysis equipment.
Inspection equipment must itself be controlled. Calibration, reference standards, fixture condition, operator training, and environmental stability all influence measurement reliability. A strong quality system links test results to production batches so that trends can be identified and corrective action can be taken quickly.
When evaluating the JC3.660.481 SMA-KFD-45, engineers should consider the complete RF path rather than judging the connector in isolation. The connector, PCB, cable, mating component, and enclosure together determine the practical performance of the system.
Most RF systems using SMA interfaces are designed around a controlled characteristic impedance, commonly 50 ohms. The connector transition should preserve this impedance as closely as practical. Discontinuities can lead to reflections, standing waves, and reduced power transfer.
Impedance behavior is affected by the center conductor dimensions, dielectric material, gap to the ground structure, board stack-up, connector body, and transition geometry. The recommended footprint should therefore be treated as an electrical design feature, not merely a mechanical mounting outline.
Insertion loss represents the energy lost as a signal passes through the interconnection. Return loss describes the energy reflected back toward the source because of impedance mismatch. Both parameters may vary with frequency, connector mating condition, PCB layout, cable construction, and test-fixture quality.
For meaningful evaluation, the connector should be tested in an assembly that reflects the intended application. A poorly designed test board can make a good connector appear to perform poorly, while an inadequate measurement setup can conceal real defects. Calibration and fixture characterization are therefore essential during RF validation.
In equipment containing several RF channels, unwanted coupling between adjacent paths can be a serious concern. Ground continuity around the connector and the correct use of shielding structures can help reduce electromagnetic leakage. The connector should be positioned with sufficient clearance from sensitive circuits, power converters, digital clocks, and other potential noise sources.
The external cable should also be routed carefully. A high-quality connector cannot compensate for poor cable shielding, an incorrect bend radius, or a cable installed too close to a radiating source. System-level electromagnetic compatibility testing should include the actual cable and enclosure arrangement.
The JC3.660.481 SMA-KFD-45 can be considered for a variety of RF and microwave applications requiring a compact angled board-to-coaxial transition. Final suitability depends on the approved specifications, frequency range, environmental conditions, mating requirements, and customer validation.
Wireless communication modules often contain antennas, transceiver circuits, filters, and power amplifiers in a compact enclosure. An angled SMA micro-strip connector can provide a practical interface for external antenna cables or test connections. Its compact arrangement can help preserve enclosure space and support a predictable cable route.
In base-station subassemblies, small-cell equipment, industrial wireless gateways, and private communication networks, serviceability is also important. A threaded external interface can make cable replacement and diagnostic testing more convenient.
Laboratory and production test equipment frequently uses SMA connections because they are easy to integrate with cables, calibration standards, attenuators, loads, and adapters. A PCB-mounted connector can support modular test fixtures, signal sources, receiver boards, filter evaluation platforms, and prototype instruments.
The angled structure may be useful when multiple connectors are installed near one another. It can help direct cables away from the fixture surface and reduce congestion around the test area.
Many antenna modules require a compact transition from a PCB feed line to a coaxial cable. The connector can be used in wireless sensors, navigation equipment, telemetry units, monitoring systems, and embedded antenna assemblies, subject to the required environmental and RF specifications.
Mechanical retention should receive special attention in antenna applications. Cable movement and repeated handling can transfer force to the PCB. The enclosure or cable should provide appropriate strain relief so that the connector does not become the only structural support for the cable.
Industrial RF equipment may be exposed to vibration, temperature changes, dust, humidity, and repeated service access. The connector selection should account for the complete environmental profile. Threaded coupling, suitable materials, adequate shielding, and controlled assembly can contribute to reliable performance, but system-level enclosure protection remains necessary.
Correct installation is essential to obtain the intended performance of any micro-strip connector. The following recommendations provide a general engineering framework. The latest product drawing and assembly instructions should take precedence over general guidance.
Before PCB release, confirm the connector outline, board thickness, mounting position, recommended land pattern, center-contact dimensions, ground-pad arrangement, and clearance requirements. Check whether the connector is intended for a board edge, a specific setback, or a defined enclosure opening.
Confirm the mating interface and cable orientation. A connector that appears mechanically suitable in a three-dimensional model may interfere with a shield, cover, neighboring connector, or fastener once the full assembly is built.
The PCB manufacturer should receive an approved footprint with all copper, solder-mask, paste, and mechanical-layer information clearly defined. The RF trace should meet the connector at the correct position and with an impedance-controlled geometry.
Ground-plane continuity should be preserved around the transition wherever possible. Avoid unnecessary voids, slots, or isolated copper islands near the signal path. If thermal relief is used, verify that it does not weaken the RF ground connection or create excessive inductance.
Use a controlled soldering process with suitable temperature, time, flux, and cleaning parameters. The connector should remain correctly aligned during soldering. Fixtures may be helpful in production if they do not damage the connector or obstruct heat flow.
After soldering, inspect the center contact and ground joints for wetting, voids, bridges, cracks, and insufficient coverage. Do not allow solder or flux residue to enter the mating interface. If cleaning is required, use a process compatible with the connector materials and PCB assembly.
The cable should be routed according to its specified bend radius. Avoid sharp bends immediately next to the connector. Where the application involves vibration or frequent movement, use clamps, brackets, or other strain-relief measures to prevent cable force from being transferred directly to the solder joints.
When connecting or disconnecting the mating cable, hold the connector body or approved support area rather than pulling on the PCB. Use the recommended wrench and tightening procedure. Excessive side loading, torque, or repeated misalignment can damage the connector and board.
RF equipment manufacturers often require more than a catalog component. The board thickness, enclosure dimensions, cable direction, plating requirements, environmental conditions, and production method may differ from one project to another. A capable supplier should be able to evaluate these requirements and determine whether a standard part is suitable or whether a modified design is necessary.
Customization may involve changes to mounting geometry, contact length, orientation, board interface, material, surface finish, packaging, or inspection requirements. Any modification should be reviewed through a formal engineering process. Electrical and mechanical changes can interact, so the design should be verified through drawings, prototypes, and appropriate testing before mass production.
Yangzhou Jingcheng Electronics Co., Ltd. provides standard, customized, and specialized interconnection solutions for diverse industries. Its professional R&D and engineering teams can support product selection, technical clarification, sample evaluation, and production coordination. The company’s manufacturing and testing resources are intended to support consistent quality across a broad range of RF products.
For an application involving the JC3.660.481 SMA-KFD-45, customers should provide the operating frequency, target impedance, PCB material and thickness, cable type, mating connector, enclosure constraints, environmental conditions, annual demand, and required certifications. This information allows the supplier to evaluate the complete application rather than selecting a connector based only on its external appearance.
A long-term RF component supplier should offer more than a large catalog. It should combine engineering knowledge, stable production, quality management, responsive communication, and the ability to support products throughout their life cycle.
More than 2,000 product types provide customers with a wide selection of RF interfaces and supporting components. This breadth can reduce the need to coordinate multiple suppliers for a single project. It also gives engineers access to compatible alternatives when packaging, orientation, or interface requirements change.
The portfolio includes coaxial connectors, adapters, reverse polarity connectors, coaxial lightning protectors, high-frequency cables, cable assemblies, attenuators, terminal loads, antennas, and other related products. Such a product range is useful when a design requires a complete RF signal chain rather than an isolated connector.
RF interconnection problems are often system problems. A supplier with design, development, production, sales, and service capabilities can participate in discussions involving connector selection, PCB integration, cable routing, enclosure design, and testing. This type of cooperation can reduce misunderstandings and shorten the time required to move from concept to validated sample.
Engineering support is also valuable when a standard product appears almost suitable but requires a small modification. Instead of forcing the customer to redesign the enclosure or PCB, the supplier may evaluate a controlled alternative based on actual production requirements.
Rigorous quality systems help ensure that product specifications are translated into repeatable manufacturing controls. Advanced manufacturing and testing equipment supports dimensional verification, process monitoring, and product evaluation. Professional R&D and engineering teams can contribute to design reviews and failure analysis when required.
For customers, the practical benefit is greater confidence that samples and production parts will remain consistent. Documentation, inspection records, traceability, and change control are particularly important for communication, industrial, transportation, and other applications where unexpected variation can be costly.
Experience accumulated since 1999 provides a foundation for understanding common RF connector challenges. Long-term industry participation can support better tooling decisions, more mature process controls, and familiarity with the requirements of different application sectors. Experience is most valuable when it is supported by ongoing equipment improvement, engineering development, and systematic quality management.
Before ordering the JC3.660.481 SMA-KFD-45, engineers and purchasing teams should confirm the following items with the supplier and within the internal project documentation.
| Evaluation Area | Questions to Confirm | Reason for Confirmation |
|---|---|---|
| Mechanical interface | What are the mating interface, body dimensions, orientation, and mounting requirements? | Prevents enclosure interference and assembly mismatch |
| PCB compatibility | What board thickness and footprint are required? | Ensures correct contact alignment and solder-joint reliability |
| Electrical performance | What impedance, frequency range, loss, and reflection requirements apply? | Confirms suitability for the intended RF signal path |
| Materials and finish | Which body, contact, insulator, and plating specifications are approved? | Supports corrosion resistance, solderability, and service life |
| Environment | Will the product experience vibration, humidity, temperature variation, or outdoor exposure? | Determines whether additional protection or qualification is required |
| Assembly | Which soldering process, cleaning method, and inspection standard will be used? | Reduces process variation and prevents assembly damage |
| Supply requirements | What are the sample quantity, annual volume, packaging, lead time, and change-control expectations? | Supports reliable production planning |
Connector reliability is influenced by mating cycles, environmental exposure, cable loading, assembly quality, and storage conditions. The SMA interface should be protected from contamination, impact, and unnecessary mechanical force. Unmated connectors may require suitable protective caps during storage or transportation.
Repeated mating should be performed with proper alignment. Cross-threading can permanently damage the interface, while excessive tightening can deform the connector or transfer force to the PCB. Operators should inspect the mating threads and contact area when equipment is serviced.
In outdoor or high-humidity systems, the connector should be integrated with an enclosure and sealing strategy appropriate to the application. A connector alone should not be assumed to provide complete environmental protection unless the relevant product specification confirms it. Cable seals, gaskets, protective covers, conformal coatings, and enclosure design may all be required.
During maintenance, technicians should check for loose mounting, cracked solder joints, damaged threads, corrosion, cable jacket damage, and changes in RF performance. If a connector is replaced, the replacement should match the approved model and configuration. Substituting a visually similar component can introduce differences in footprint, impedance, plating, or mechanical strength.
Using a defined SMA micro-strip connector can accelerate development in several ways. First, it gives the engineering team a known interface for early prototypes. Standard SMA cables and test instruments can be connected without designing a special temporary interface.
Second, the connector supports more direct RF evaluation. Engineers can connect a network analyzer, signal generator, power meter, or antenna assembly to the prototype and evaluate the board transition during development. Problems can be identified before the enclosure and production tooling are finalized.
Third, a stable connector footprint helps bridge the transition from prototype to volume production. Once the PCB layout, soldering process, and cable arrangement are validated, the same basic interconnection method can be applied across product revisions, subject to formal engineering approval.
Finally, the connector can simplify procurement and service documentation. A clear part number, defined drawing, and consistent interface make it easier to communicate requirements among design engineers, PCB manufacturers, assembly plants, test departments, and field-service teams.
The JC3.660.481 SMA-KFD-45 is a compact SMA micro-strip connector intended for reliable RF transitions between a PCB and an external coaxial connection. Its threaded SMA interface, board-level construction, and 45-degree configuration make it a practical choice for applications that require secure mating, efficient cable routing, controlled packaging, and repeatable assembly.
Its advantages over general-purpose connection methods include a standardized RF interface, reduced internal cabling, improved production consistency, compact integration, and convenient compatibility with widely available SMA cables and test accessories. The angled arrangement can also help control cable direction and reduce mechanical congestion inside compact equipment.
Successful use depends on proper PCB design, impedance-aware layout, controlled grounding, suitable soldering, cable strain relief, and system-level RF validation. The connector should always be evaluated together with the board, cable, mating component, enclosure, and operating environment.
Yangzhou Jingcheng Electronics Co., Ltd. supports this type of product with experience dating from 1999, a portfolio of more than 2,000 RF product types, advanced manufacturing and testing equipment, professional R&D and engineering teams, and capabilities covering standard, customized, and specialized interconnection solutions. Its broader range of coaxial connectors, adapters, reverse polarity connectors, lightning protectors, high-frequency cables, attenuators, terminal loads, antennas, and cable assemblies can help customers develop complete RF systems through a coordinated supply relationship.
For engineers seeking a practical board-to-coaxial solution, the JC3.660.481 SMA-KFD-45 should be considered through a complete technical review. When its mechanical configuration, electrical performance, PCB footprint, assembly process, and environmental requirements are correctly matched, it can contribute to a compact, serviceable, and dependable RF product design.
It is an SMA micro-strip connector designed to provide a PCB-to-coaxial RF transition. The model designation identifies a specific product configuration, including a 45-degree arrangement indicated by the “45” suffix. Exact dimensions and performance should be confirmed using the current product drawing and technical data.
The micro-strip design allows the connector to be integrated directly with a PCB transmission line. This can reduce internal cabling, shorten the RF path, simplify assembly, and support more controlled impedance continuity when the connector footprint and board layout are correctly designed.
A 45-degree connector can direct the mating cable along a more suitable route inside or outside an enclosure. It may reduce cable bending, improve clearance from adjacent components, and make better use of limited mechanical space. The actual benefit depends on the equipment layout and cable construction.
No connector should be considered suitable for every application without verification. Engineers should confirm frequency range, impedance, mating interface, board thickness, mounting method, environmental conditions, cable requirements, and mechanical clearances before approval.
Useful information includes the required model, quantity, PCB thickness, operating frequency, target impedance, cable type, mating connector, enclosure constraints, material or plating requirements, environmental conditions, packaging needs, sample schedule, and expected annual volume.
The engineer should use the approved footprint, route the micro-strip trace with the correct width, preserve a suitable ground structure, minimize abrupt geometry changes, and validate the transition through simulation or measurement when necessary. The PCB stack-up and dielectric properties must also be considered.
Possible causes include an incorrect footprint, poor grounding, excessive solder, insufficient solder, damaged mating surfaces, cable mismatch, improper tightening, unsuitable PCB stack-up, enclosure coupling, or an inaccurate test fixture. System-level troubleshooting should examine the complete signal path.
Customization may be possible depending on the required modification, production volume, electrical targets, materials, and tooling implications. Customers should submit a complete technical requirement for engineering review rather than assuming that a standard product can be altered without qualification.
A project may also require coaxial adapters, high-frequency cables, cable assemblies, reverse polarity connectors, coaxial lightning protectors, attenuators, terminal loads, antennas, or other RF components. Coordinating these products through one experienced supplier can simplify interface management and procurement.
Keep the interface clean, protect unmated connectors during storage, avoid cross-threading, use the recommended tightening method, control cable bend radius, and provide strain relief where required. During service, inspect threads, contacts, solder joints, mounting surfaces, and cable condition.
1. General principles of RF coaxial connector design, impedance control, and transmission-line transitions.
2. Standard engineering practices for SMA threaded interfaces and RF cable assemblies.
3. Printed circuit board design guidance for micro-strip transmission lines and controlled-impedance routing.
4. Manufacturing and inspection practices for precision RF connectors, contact systems, plating, and solderable components.
5. Product information supplied for the JC3.660.481 SMA-KFD-45 SMA Micro-strip Connector.
6. Corporate information supplied for Yangzhou Jingcheng Electronics Co., Ltd., including product categories, manufacturing capabilities, engineering resources, and company history.
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