2.92 mm K RF Connectors Guide: Types, Structure, and Uses Explained
What are 2.92 mm K RF Connectors?
The 2.92 mm RF connector, also known as the K connector, is a high-frequency, precision connector designed for applications up to 40 GHz and beyond. It is fully compatible with SMA and 3.5 mm connectors while offering improved performance and reliability in high-frequency test and measurement environments. With a 50 Ω impedance and a robust threaded coupling, it ensures stable and repeatable connections.
2.92 mm RF Connector Compatibility with 3.5 mm and SMA Connectors
2.92 mm (K-type) RF connectors are mechanically compatible with both 3.5 mm and SMA connectors,
making them widely used for broadband measurement systems.
While inter-mating is possible, small structural differences in the dielectric and interface geometry
can cause slight play or wear over time.
To maintain consistent performance at high frequencies, dedicated conversion adapters are recommended.
Typical frequency ranges are up to 18 GHz for SMA, 26.5 GHz for 3.5 mm, and 40 GHz for 2.92 mm K connectors.
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Browse 2.92 mm K RF Connectors by Product Type
Find 2.92mm K RF connectors by type and quickly navigate to the right product category.
Can't find the right 2.92mm K RF connector? We're here to help.
Find High-Frequency Test Cables (Up to 40 GHz)
We offer a wide range of high-frequency measurement cables with 2.92 mm K connectors, compatible with SMA and other connectors. Refer to the product page for specifications.
TC-048 40 GHz Compatible, High-Frequency
TC-048 is a premium cable designed for 40 GHz measurement with low loss and high phase stability. It features triple shielding and excellent resistance to bending and temperature, making it ideal for network analysis and other measurement applications.Connectors are available in 2.92 mm (plug and jack), SMA (plug and jack), and 3.5 mm (plug and jack). A non-magnetic 2.92 mm (plug) option is also offered.For detailed cable specifications, electrical characteristics, and additional information, please refer to the pages listed below.
TC-120 50 GHz Compatible, Low-loss
TC-120 is a precision-grade cable compatible with 50 GHz, offering low loss, high phase stability, triple shielding, bend resistance, and temperature stability, making it ideal for network analysis and other measurement applications.Connectors are available in 2.4 mm (plug, jack), 2.92 mm (plug, jack), and SMA (plug, jack). A non-magnetic 1.85 mm (plug, jack) option is also offered, compatible up to 50 GHz. An armored type with stainless steel tube reinforcement is available in addition to the standard type.
For detailed cable specifications, electrical characteristics, and additional information, please refer to the pages listed below.
TC-054 60 GHz Compatible, High-Flexibility
This 0.085-in (RG405) equivalent cable is highly flexible and maintains stable performance up to the millimeter wave band. Its wide variety of compatible connectors and relatively low cost make it suitable for various applications.
Connectors are available in 1.85 mm (plug), 2.92 mm (plug, jack), SMA (plug, L plug, jack), N (plug), and others upon request. The 1.85 mm cable core is pinned, enabling use up to 60 GHz with minimal reflection.
For detailed cable specifications, electrical characteristics, and additional information, please refer to the pages listed below.
2.92 mm K RF Connector Features
High-Frequency
We offer a range of products designed for high-frequency use from DC to 40 GHz. The air dielectric and 2.92 mm outer diameter enable higher frequencies than SMA connectors.
Compatibility
The 2.92 mm K connectors are compatible and can be mated with SMA and 3.5 mm connectors.
Compact Size
The compact size of the connector enables high-density mounting in tight spaces, making it suitable for internal wiring, subassembly connections, and inter-device connections.
2.92 mm K RF Connector Applications
This product is ideal for applications such as satellite mounts, military equipment, aviation systems, network analyzers, and other high-performance systems requiring precision and reliability in demanding environments. Suitable for industries where durability, stability, and high-frequency performance are essential for optimal operation.
RF Connector Frequency Comparison
The following RF connectors are commonly used in high-frequency applications, each with different frequency ranges and characteristics.
1.0 mm: Up to 110 GHz
1.85 mm (V): Up to 67 GHz
2.4 mm: Up to 50 GHz
2.92 mm (K): Up to 40 GHz
3.5 mm: Up to 34 GHz
SMA: Up to 18 GHz
Higher-frequency connectors offer better performance but typically require more careful handling and precise alignment.
How to Choose 2.92 mm K RF Connectors
Choosing the right 2.92 mm K RF connector requires careful consideration of frequency performance, compatibility, and application requirements. Use the following points as a guide.
1. Confirm Frequency Requirements
2.92 mm connectors are designed for high-frequency applications up to 40 GHz and beyond.
Ensure the connector meets your required frequency range, especially for test and measurement use.
2. Check Compatibility (SMA / 3.5 mm)
2.92 mm connectors are mechanically compatible with SMA and 3.5 mm connectors.
However, repeated mating with lower-precision SMA connectors may affect performance, so proper usage is important.
3. Select the Right Connector Type
Choose based on your application:
- Adapters: for interconnection and conversion
- Receptacles: for panel or PCB mounting
- Terminators: for signal termination
- Cable assemblies: for direct connection
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4. Choose the Appropriate Cable
Select cables that support high-frequency performance, such as test cables or semi-rigid/semi-flexible cables.
Cable quality directly impacts signal integrity.
5. Consider Application and Environment
For RF testing, measurement, or high-frequency systems, prioritize precision and repeatability.
Material, plating, and durability should also be considered.
Tip: For best performance, select connectors and cables together as a matched solution.
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2.4 mm vs 2.92 mm (K) vs 3.5 mm RF Connectors
2.4 mm, 2.92 mm (K), and 3.5 mm RF connectors differ in compatibility and frequency range.
2.4 mm supports up to 50 GHz and is not compatible with SMA, ensuring stable high-frequency performance.
2.92 mm supports up to 40 GHz and is compatible with SMA and 3.5 mm connectors.
3.5 mm supports up to 34 GHz and provides high mechanical precision for measurement applications.
2.4 mm is suited for stable high-frequency use, 2.92 mm for flexibility, and 3.5 mm for precision testing.
View Coaxial Cable Assemblies with 2.92 mm Connectors
High-performance cables with 2.92 mm plugs or jacks on both ends, supporting up to 40 GHz, are available at a slightly lower cost. Total lengths range from 300 mm to 1,000 mm. Custom orders can be produced starting from 1 piece, with delivery times of 2–5 weeks depending on the production lot.
Request Custom Semi-Flexible Cable Solutions
Semi-flexible cables supporting frequencies from 18 to 40 GHz. These shape-memory cables can be bent to some extent while offering high shielding and low loss (attenuation). Three thickness options and coated or uncoated types are available.They can be paired with small high-frequency connectors such as SMA, N, 2.92 mm (K), and SMP. Connector compatibility varies by cable type.
0.141 Inches SF-014 Semi-Flexible RF Cables
Semi-flexible RF cables equivalent to 0.141-in. Choose SF-014 (no jacket) or SF-039 (with jacket) based on sheath requirements.
Note: The lineup does not include a 2.92 mm connector compatible with SF-039 (with jacket).
For detailed cable specifications, electrical characteristics, and more, please refer to the pages below.
0.085-in SF-021 Semi-Fexible RF Cables
A semi-flexible RF cable equivalent to 0.085-in. Choose SF-021 (no jacket) or SF-030 (with jacket) based on sheath requirements.
Note: The lineup does not include a 2.92 mm connector compatible with SF-030 (with jacket).
For detailed cable specifications, electrical characteristics, and more, please refer to the pages below.
Request Custom Semi-Rigid Cable Assemblies
Semi-rigid cables for frequency bands from 18 to 50 GHz. These coaxial cables use a seamless metal tube to provide superior shielding and lower attenuation compared to semi-flexible cables.
Available in five different diameters, with customizable bending options. Compatible with SMA, N, 2.92 mm (K), 2.4 mm, 1.8 mm (V), and other small connectors for high-frequency applications.
0.141-in SR-001 Semi-Rigid RF Cables
Semi-rigid 0.141-in RF cable. Ideal for high-precision phase control.
For detailed cable specifications, electrical characteristics, and more, please refer to the pages below.
0.085-in SR-002 Semi-Rigid RF Cables
0.085 inch equivalent semi-rigid RF cable, offering the widest range of compatible connectors. We can support up to 50 GHz.
For detailed cable specifications, electrical characteristics, and more, please refer to the pages below.
0.047-in SR-003 Semi-Rigid RF Cables
A 0.047 inch equivalent semi-rigid RF cable. It offers a wide variety of compatible connectors.
For detailed cable specifications, electrical characteristics, and more, please refer to the pages below.
0.034-in SR-004 Semi-Rigid RF Cables
The thinnest semi-rigid RF cable, equivalent to 0.034-in.
For detailed cable specifications, electrical characteristics, and more, please refer to the pages below.
2.92 mm K RF Connector: Standards & Technical Specifications
Compatible Standards
Complies with military standard MIL-STD-348A and international standard IEC 61169-35.
Nominal Impedance
Impedance rating is 50 Ω, indicating compatibility with most standard RF equipment.
Coupling Method (Connector Interface)
Connectors securely join using threaded coupling 1/4-36UNS-2A, 2B for stable signal transmission.
Working Voltage (Rated Voltage)
Rated for standard operating voltage of up to AC 250 V.
Maximum Withstanding Voltage
Safely withstands up to AC 750 V for one minute without electrical breakdown.
Insulation Resistance
Minimum insulation resistance of 5,000 mΩ when tested with 500 V, ensuring electrical safety.
Contact Resistance
Maximum contact resistance of 3.0 mΩ (center) and 2.0 mΩ (outer) when conducting DC current of 1 amp, ensuring efficient connection.
Frequency Range
Suitable for signals within frequency range from DC to 40 GHz.
Note: The figures provided are typical values. For further details, please contact us.
2.92 mm RF Connector FAQs
QWhy is there a conversion connector for SMA connectors when it is compatible with SMA connectors?
QWhy is there a conversion connector for SMA connectors when it is compatible with SMA connectors?
SMA, 3.5 mm, and 2.92 mm connectors are compatible and mated easily. Conversion adapters are critical for applications where stringent measurements demand connector precision.
QAre there connectors with higher frequency and smaller sizes?
QAre there connectors with higher frequency and smaller sizes?
SMA connectors work up to 18 GHz, 3.5 mm connectors up to 26.5 GHz, and 2.92 mm K connectors up to 40 GHz. Smaller SMP connectors support frequencies up to 40 GHz. Additionally, our lineup includes 1.0 mm connectors that support frequencies up to 110 GHz, 1.85 mm V connectors that support up to 67 GHz, and 2.4 mm connectors that support up to 50 GHz.
QWhat is the frequency range of 2.92 mm K connectors?
QWhat is the frequency range of 2.92 mm K connectors?
The 2.92 mm K connectors support a frequency range from DC to 40 GHz, providing reliable performance for high-frequency applications and ensuring signal integrity.
QWhat is the coupling mechanism for 2.92 mm K connectors?
QWhat is the coupling mechanism for 2.92 mm K connectors?
The connectors use a threaded coupling mechanism, specifically 1/4-36UNS-2A, 2B threads, to ensure secure mating and stable signal transmission in high-frequency environments.
QWhat are the typical applications of 2.92 mm K connectors?
QWhat are the typical applications of 2.92 mm K connectors?
These connectors are widely used in satellite mounts, military and aviation equipment, network analyzers, and other fields requiring high-frequency precision and reliability.
QWhat materials are used in 2.92 mm K connectors?
QWhat materials are used in 2.92 mm K connectors?
2.92 mm K connectors are constructed with durable materials such as stainless steel and high-performance insulators to ensure mechanical strength and electrical stability.
QWhat is the insulation resistance of 2.92 mm K connectors?
QWhat is the insulation resistance of 2.92 mm K connectors?
These connectors provide an insulation resistance of at least 5,000 mΩ when tested at 500 V direct current, ensuring electrical safety and reliability.
QWhat is the maximum voltage rating for 2.92 mm K connectors?
QWhat is the maximum voltage rating for 2.92 mm K connectors?
The connectors are rated for a standard operating voltage of AC 250 V and can safely withstand up to AC 750 V for one minute without electrical breakdown.
QWhat is the contact resistance of 2.92 mm K connectors?
QWhat is the contact resistance of 2.92 mm K connectors?
The contact resistance is a maximum of 3.0 mΩ for the center conductor and 2.0 mΩ for the outer conductor, ensuring efficient and stable connections.
QAre 2.92 mm K connectors compatible with SMA and 3.5 mm connectors?
QAre 2.92 mm K connectors compatible with SMA and 3.5 mm connectors?
Yes, 2.92 mm K connectors are fully compatible with SMA and 3.5 mm connectors, allowing seamless mating and integration into existing systems.
Purchase Guide
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Catalog
2.92mm K Type RF Connector Catalog
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