Xi'an Weitian Electronic Technology Co. , Ltd
Xi'an Weitian Electronic Technology Co. , Ltd
Model No.: WT-123
Brand: WEITIAN
When your radar or Satellite Communication platform needs a continuous 360-degree RF path, an I Type Waveguide Rotary joint is often the right choice because its straight inline housing keeps the fixed and rotating sections aligned on one axis. As Foreign Trade Director at Xi'an Weitian Electronic Technology Co., Ltd., I work with radar and aerospace teams across Japan, South Korea, Australia, and Singapore who need a rotary joint that does not introduce signal fluctuation during scanning, and that does not require frequent maintenance in field-deployed or long-running systems.
This 17.3-18.4GHz Waveguide Rotary Joint uses a non-contact choke structure to maintain RF coupling as the joint rotates, which is why the Inline Waveguide Rotary Joint can support long maintenance-free operation. The internal design is wear-resistant and vibration tolerant. In a typical test setup, a Waveguide Coupler may be placed on the fixed port to monitor outgoing power, while the rotating port can be terminated with a High Power Load during calibration runs. If the system also requires polarization alignment, a Polarization Rotator can be added in the Straight Waveguide run upstream or downstream.
With VSWR ≤1.25 and insertion loss ≤0.3 dB across the band, and VSWR variation held within 0.05 throughout rotation, this unit delivers the consistency expected by APAC defense electronics and satellite communication programs. It handles up to 50 W average power, uses FBP140-FBM140 flanges, and is built from aluminum with a conductive oxidation finish.
| Parameter | Specification | Asia Pacific Localization Note |
|---|---|---|
| Structure Type | I type, inline straight housing | One-axis alignment, compact for tight equipment bays |
| Frequency Range | 17.3 - 18.4 GHz | Ku/K band used in APAC surveillance radar and satellite ground systems |
| VSWR | ≤ 1.25 | Better impedance matching than typical ≤1.3 |
| VSWR Variation During Rotation | ≤ 0.05 | Stable through full 360 degree rotation |
| Insertion Loss | ≤ 0.3 dB | Including rotating path |
| Insertion Loss Variation | ≤ 0.05 dB | Consistent during continuous rotation |
| Average Power | ≤ 50 W (CW) | Suited to radar feed and satcom uplink paths |
| Waveguide Flange | FBP140 - FBM140 | Matches K-band flange patterns common in APAC radar equipment |
| Material | Aluminum | Lightweight for airborne, shipboard, and mobile installations |
| Surface Finish | Conductive oxidation | Provides corrosion resistance without adding heavy paint thickness |
| Rotation Life | Designed for over 5 million rotations | Non-contact choke design, no sliding contact wear |
| Maintenance | Long maintenance-free interval | Wear resistant and vibration tolerant |
| Mounting | Compact housing, multiple mounting orientations | Fits narrow spaces and varied installation directions |
| Quality System | ISO 9001:2015 certified | In-house RF testing per unit before shipment |
| Asia Pacific Market Segment | Buyer Type | Local Pain Point | Our Product Advantage (Quantified) |
|---|---|---|---|
| Japanese radar and aerospace | Radar equipment manufacturers and space system integrators | Demand long service life and low maintenance in precision defense and satellite programs | Designed for over 5 million rotations; VSWR ≤1.25; rotation variation within 0.05 |
| South Korean defense electronics | Ground and naval radar system builders | Need high-reliability components that meet domestic defense program requirements | Non-contact choke design; 50 W power handling; compact inline housing fits shipboard cabinets |
| Australian defense and field systems | Outdoor radar and coastal surveillance operators | Require corrosion-resistant components for harsh coastal and outback environments | Conductive oxidation aluminum; compact design; IP-style field mounting support available |
| Singapore research and defense labs | Radar research institutions and test facilities | Need compact rotary joints for bench and anechoic chamber measurements | Straight inline structure integrates easily with Standard Gain Horn and test instrumentation; 50 W rating suits lab-level power |
Q1: What does the inline I type structure mean for system integration?
A: The I type places the fixed and rotating waveguide sections on a single straight axis, so it can be inserted directly into a straight waveguide run without a right-angle offset. This simplifies mechanical mounting and is convenient when the available space along the axis is limited but side clearance is tight.
Q2: How does the non-contact choke design achieve long rotation life?
A: The design maintains RF energy transfer through a choke gap rather than a sliding mechanical contact. Because there is no physical rubbing surface, wear is minimized and the joint is designed for over 5 million rotations with a long maintenance-free interval. Actual life depends on rotation speed, environment, and power level.
Q3: Can this rotary joint be used outdoors or in environmental stress conditions?
A: The conductive oxidation finish provides corrosion resistance and the aluminum housing is suited to sheltered or enclosed installations. For fully outdoor exposure, we recommend discussing the mounting enclosure and environmental rating requirements with our engineering team before ordering.
CTA: Contact our RF engineering team today for a datasheet, flange configuration discussion, or technical consultation for your Asia Pacific radar or satellite communication program.
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