1 Channel 2.92mm RF Rotary Joint DC-40GHz Low Loss Supplier
1. Product Overview
The YZRF-2.92-40G-01 is a single-channel 2.92mm coaxial RF rotary joint designed for K/Ku-band radar, satellite communications and mmWave test equipment. It is mounted at the rotating center of an antenna or turntable to transfer RF signals from the stationary side (feed / transceiver chain) to the rotating upper structure (antenna / positioner) with 360-degree continuous rotation.
With a 2.92mm (K-type) 50 Ohm interface and 316L stainless steel housing of only Phi 25.4 x 36.55 mm, it covers DC to 40 GHz in one compact channel, eliminating cable twisting, signal interruption and phase drift under continuous rotation.
2. Key Features
- ● Wideband single-channel design — DC to 40 GHz via one 2.92mm channel covering Ku, K and lower Ka bands, no need to swap joints across bands.
- ● Low insertion loss — under 1.0 dB across the whole band, with rotational IL variation under 0.1 dB.
- ● High signal stability — VSWR under 1.6 with variation under 0.15, protecting sensitive receiver chains.
- ● Wide-temperature rugged design — -40 to +70 Celsius operating, IP51, qualified to GJB 150 humidity, vibration and shock.
- ● Long life, low torque — at least 5 million revolutions, 50 RPM continuous speed, starting torque under 0.3 N.m.
- ● Flange mounting — easy integration with antenna pedestals and turntables.
- ● Customization friendly — supports flange orientation, cable tails and multi-channel hybrid integration.
3. Technical Specifications
| Parameter | Specification |
|---|---|
| Model | YZRF-2.92-40G-01 (L36.55) |
| Channel | 1 |
| Interface | 2.92-K (50 Ohm) |
| Frequency Range | DC ~ 40 GHz |
| Insertion Loss | under 1.0 dB |
| IL Variation | under 0.1 dB |
| VSWR | under 1.6 |
| VSWR Variation | under 0.15 |
| Average Power | 20W @ DC~18 GHz |
| Peak Power | 100W @ DC~18 GHz |
| Starting Torque | under 0.3 N.m |
| Running Torque | under 0.1 N.m |
| Speed | 50 RPM |
| Phase Variation | plus or minus 5 degrees |
| Dimensions | Phi 25.4 x 36.55 mm |
| Service Life | at least 5,000,000 revolutions |
| Operating Temperature | -40 to +70 Celsius |
| Storage Temperature | -55 to +85 Celsius |
| Housing Material | 316L Stainless Steel |
| Protection Class | IP51 |
4. Application In K-Band SATCOM & mmWave Test
In a tracking antenna or mmWave test turntable, this rotary joint works as the RF signal bridge:
- Stationary side (stator) — connected to the BUC/LNB or VNA receiver chain
- Rotating side (rotor) — connected to the antenna feed, tracking mount or positioner
Transmitted signals include:
- Wideband RF carrier for Ku/K-band satcom links
- mmWave test signals for antenna pattern and TRP measurement
- Low-level reference / tracking signals with stable phase
Without a dedicated rotary joint, the coax cable would twist and break after a few rotations, causing link loss or measurement drift.
