Mi-Wave · Waveguide Transmission Components
660/670 Series Waveguide Bends
E-plane and H-plane bends from X-band to J-band and beyond, machined for VSWR as low as 1.06:1
The Mi-Wave 660 Series (E-plane) and 670 Series (H-plane) are precision rectangular waveguide bends that turn a run in the electric-field or magnetic-field plane. Standard angles are 30, 45, 60 and 90 degrees. The E-plane series runs from 8.2 GHz to 500 GHz (WR-2.2); the H-plane series is listed to 325 GHz (WR-3). Satellite, aerospace, defense and mm-wave test builds use them where a straight run cannot reach. Tight tolerances and a rigid body keep the typical VSWR down to 1.06:1 in the lower bands, so the bend adds little reflection to the link. Evencat is an authorized Mi-Wave distributor in Taiwan.
Overview
Both series are formed from precision rectangular waveguide and terminate in MIL flanges (UG-39/U, UG-595/U, UG-599/U, UG-383/U, UG-385/U, UG-387/U and UG-387/U-M), so they bolt onto existing hardware. A 660 bend turns the guide in the E-plane and a 670 bend in the H-plane; each changes direction with minimal effect on system VSWR and keeps the mm-wave signal intact. Coverage starts at X-band (8.2 GHz, WR-90) and runs through J-band (WR-3), with E-plane parts extending to WR-2.2 at 500 GHz, so satellite, radar, 5G mm-wave and lab measurement work are all served. The four standard angles are 30, 45, 60 and 90 degrees, and Mi-Wave will make special angles, bend radii and mechanical envelopes to order. Test data is taken at +25 °C so figures are comparable between units. When you specify a bend, confirm the plane (E or H) against your layout, the angle, and the flange on each face; the 665/675 45-degree parts are the usual choice where space is tight.
Key specifications
| Series | 660 Series (E-plane) / 670 Series (H-plane) |
|---|---|
| Bend plane | 660: E-plane (electric field); 670: H-plane (magnetic field) |
| Standard bend angles | 30° (661/671), 45° (665/675), 60° (662/672), 90° (660/670) |
| Frequency coverage | 8.2 GHz – 325 GHz (X-band to J-band) for both series; E-plane parts also listed to 500 GHz (WR-2.2) |
| Waveguide sizes | WR-90 (8.2–12 GHz) to WR-3 (220–325 GHz) |
| Typical VSWR (lower bands) | 1.06:1 (X, K, Ka and Q bands, 8.2–50 GHz) |
| Typical VSWR (upper bands) | 1.12:1 (U-band, 40–60 GHz); 1.15:1 (V, E, W, F, D, G, H and J bands) |
| Flange standards | UG-39/U, UG-595/U, UG-599/U, UG-383/U, UG-385/U, UG-387/U, UG-387/U-M |
| Test temperature | +25 °C (ambient) |
| Custom options | Special angles, bend radii, lengths and mechanical envelopes to order |
Features
Machined to tight tolerances
Rigid rectangular guide is formed under close mechanical control, so bend angle and flange alignment repeat from unit to unit, which matters in a measurement chain.
Low VSWR
Typical VSWR is 1.06:1 in the lower bands and holds at 1.15:1 through the mm-wave bands, so the bend adds little reflection to the system.
E-plane and H-plane in one family
The 660 Series turns in the E-plane and the 670 Series in the H-plane, so the routing can follow the chassis rather than the other way round.
X-band to WR-2.2 from one supplier
Coverage runs from WR-90 through WR-3, with E-plane parts to WR-2.2 at 500 GHz, which keeps a wideband build on a single vendor.
Standard flanges, no adapters
Every model carries its MIL flange (UG-39/U through UG-387/U-M) and mates directly with existing waveguide runs, which shortens integration.
Custom angles and shapes
Beyond the standard 30, 45, 60 and 90 degree parts, Mi-Wave builds special angles, radii and envelopes for satellite payloads, radar antennas and awkward lab layouts.
Typical applications
Satellite communications
Routing feed networks in payloads and ground stations
Feed waveguide in a ground station or a satellite payload has to clear structure and double back into a specified bay. A 90-degree E-plane or H-plane bend turns the run without changing the propagating mode, keeps return loss low and preserves power efficiency on long Ka, Q and V band links.
Radar and electronic warfare
Packing feed channels into phased-array radar
Phased-array radar and EW systems fit many feed channels into a small enclosure. Bends let each branch of the power-divider network turn vertically or horizontally while keeping the low loss and power handling of waveguide, which coaxial cable cannot match. The result is a shorter signal path and less heat.
RF measurement
Aligning mm-wave VNA test setups
When a VNA with mm-wave extenders sweeps an antenna, filter or other DUT, the fixture port rarely lines up with the extender axis. A 660/670 bend brings the two into alignment without moving the instrument, and avoids the extra loss and uncertainty of a coaxial adapter chain, so the measurement repeats.
Options and configuration
Choose the bend plane, band and angle you need; the selections are collected into a list and carried into the quote form.
Bend plane (E-plane / H-plane)
Bend angle
Band and waveguide size
Downloads
- 660 Series E-plane bend test data (W-band)Datasheet · PDF
- 660 Series E-plane bend test data (V-band)Datasheet · PDF
- 670 Series H-plane bend test data (V-band)Datasheet · PDF
- 670 Series H-plane bend test data (K-band)Datasheet · PDF
- 670 Series H-plane bend test data (E-band)Datasheet · PDF
- Mi-Wave product page (E-plane bends)miwv.com
- Mi-Wave product page (H-plane bends)miwv.com
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