Mi-Wave · Waveguide Antennas
260 Series Waveguide Probe Antennas
Broadband waveguide probe antennas from 8.2 GHz to 500 GHz with high directivity and low gain variation
The Mi-Wave 260 series is a family of precision open-ended waveguide probe antennas that hold high directivity, low gain variation and consistent electrical behavior across each band. Low insertion loss, good power handling and standard waveguide flanges make them easy to drop into RF, microwave and millimeter-wave systems. Engineers choose them for near-field scanners, material measurement, radar work and research where a broadband, predictable probe matters more than gain.
Overview
The Mi-Wave 260 series waveguide probe antennas cover 8.2 GHz to 500 GHz across the X, K, Ka, Q, U, V, E, W, F, G, H and J bands and beyond, serving microwave through sub-terahertz systems from one family. Each probe is known for high directivity with little gain variation over its operating band, along with low insertion loss, good power handling and a rugged body. Every model uses a standard rectangular waveguide size and a standard flange (UG-39, UG-595/U, UG-599/U, UG-383/U, UG-385/U, UG-387/U and others), so it fits existing measurement setups without adapters. Typical gain is about 4.6 dB to 5.2 dB depending on band. When ordering, match the waveguide size to your band, note that flange styles change above 40 GHz, and ask for the outline drawing if the probe must fit a scanner fixture. The series suits test and measurement, radar platform validation, communication systems and advanced research, and Mi-Wave offers custom bands and interfaces on request.
Key specifications
| Frequency range | 8.2 GHz to 500 GHz (by model) |
|---|---|
| X-band model (260X/39) | 8.2 to 12.4 GHz, 5.2 dB gain, WR-90 / UG-39 flange |
| K-band model (260K/595) | 18 to 26.5 GHz, 4.6 dB gain, WR-42 / UG-595/U flange |
| Ka-band model (260A/599) | 26.5 to 40 GHz, 4.9 dB gain, WR-28 / UG-599/U flange |
| V-band model (260V/385) | 50 to 75 GHz, 4.9 dB gain, WR-15 / UG-385/U flange |
| W-band model (260W/387) | 75 to 110 GHz, 4.8 dB gain, WR-10 / UG-387/U-M flange |
| H-band model (260H/387) | 170 to 260 GHz, 4.9 dB gain, WR-04 / UG-387/U-M flange |
| Highest-band model (260(2.2)/387) | 325 to 500 GHz, 4.9 dB gain, WR-2.2 / UG-387/U-M flange |
| Typical gain | About 4.6 dB to 5.2 dB (varies by band) |
| Waveguide interface | Standard rectangular waveguide sizes and standard flanges |
Features
High directivity, low gain variation
Each probe keeps its directivity and gain nearly flat across its operating band, so the radiation characteristic stays consistent.
Very wide coverage
Models run from 8.2 GHz to 500 GHz across X, K, Ka, V, W, H and up to WR-2.2, spanning microwave to sub-terahertz needs.
Low loss, good power handling
Low insertion loss and solid power handling suit systems where performance and measurement accuracy are tightly specified.
Standard waveguide flanges
Standard waveguide sizes and flanges (UG-39, UG-595/U, UG-599/U, UG-383/U, UG-387/U and others) make integration straightforward.
Rugged construction
A sturdy mechanical build suits test and measurement, radar platforms, communication systems and research environments.
Custom configurations
Specific bands, interfaces and application needs can be built to order for professional RF, microwave and millimeter-wave systems.
Typical applications
Near-field measurement
Near-field antenna measurement system calibration and validation
As the probe element of a near-field scanner, the open-ended waveguide 260 series samples the electric field point by point close to the antenna under test; a transform then rebuilds the far-field pattern. Its flat gain across the band (the factory specifies low gain variation without publishing a figure) keeps every sample repeatable, which makes it the reference probe for millimeter-wave antenna development and outgoing inspection.
Material characterization
Dielectric constant and loss measurement of high-frequency materials
In the lab, engineers point a 260 series probe at a substrate or composite sample held in a fixture and use free-space transmission or reflection methods to extract dielectric constant and loss tangent from 8 GHz to 500 GHz. The data supports material selection and process control for 5G/6G substrates, radar absorbing material (RAM) and aerospace composites.
Radar and EMC
Millimeter-wave radar subsystem test and EMC verification
In a semi-anechoic or shielded room, a 260 series probe on a vector network analyzer measures radiated power, beamwidth and sidelobe level of automotive radar (77/79 GHz) or defense W-band radar modules. The same probe scans for EMC emissions, helping engineers find hot spots before production and shorten the compliance schedule.
Options and configuration
Choose the band and options you need; we compile the list and carry it into the quote form.
Band and model
Standard flange (by model)
Custom options
Downloads
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