When designing high-frequency RF and microwave systems, choosing between 2.92mm (K) connectors and 2.4mm connectors is critical.

Both are precision RF connectors widely used in PCB, test, and mmWave applications, but they differ significantly in frequency range, performance, and application scenarios.

Southwest 2.92mm connectors support up to 40GHz and are compatible with SMA, while 2.4mm connectors support up to 50GHz with better performance but no SMA compatibility.

 Key Differences at a Glance

1. Frequency Performance

2.92mm Connector

Supports DC – 40GHz

Suitable for most RF and microwave applications

Widely used in 5G, test systems, PCB designs

Typical model:

1092-04A-12

1093-01A-6

2.4mm Connector

Supports DC – 50GHz

Designed for mmWave applications

Superior signal integrity at ultra-high frequencies

Typical model:

1492-01A-5

1492-04A-5

 2. Mechanical Compatibility

2.92mm

·Compatible with SMA connectors

·More flexible in mixed systems

·Lower risk of damage in general use

2.4mm

·NOT compatible with SMA

·Requires dedicated mating connectors

·Higher precision requirement

3. Signal Integrity & VSWR

2.4mm connectors provide:

·Lower VSWR

·Better insertion loss

·More stable mmWave performance

2.92mm connectors:

·Already excellent for most applications

·More cost-effective

4. Cost & Practical Use

5. Application Scenarios

Choose 2.92mm if you need:

RF PCB design

5G systems

General microwave testing

Cost-effective solution

Choose 2.4mm if you need:

mmWave (>40GHz)

Precision measurement

Aerospace & defense

Ultra-low signal loss

Expert Recommendation

If your design frequency is below 40GHz → choose 2.92mm

If your system requires maximum performance up to 50GHz → choose 2.4mm

  Core is one of the agents of SOUTHWEST Microwave. If you need to know more about and purchase Southwest products, you can consult CORE customer service or fill out the RFQ.