Description
Andrew 55001-90 WR90 Pressure Window Assembly X-Band Waveguide Flange
The Andrew 55001-90 is a WR90 waveguide pressure window assembly designed to maintain pressurization in X-band waveguide transmission lines while allowing RF energy to pass with minimal loss. It features a rectangular WR90 waveguide flange on one end and a male threaded coaxial port, enabling transition between waveguide and coaxial line segments. The body is machined from brass/copper alloy construction typical of Andrew Corporation's waveguide hardware.
Specifications & What's Included
- Manufacturer: Andrew Corporation
- Model / Part Number: 55001-90
- Type: Waveguide Pressure Window Assembly
- Waveguide Size: WR90
- Frequency Band: X-Band (8.2–12.4 GHz)
- Flange I.D. (WR90 end): 0.900 × 0.400 in
- Flange I.D. (opposite end): 0.960 × 0.580 in
- Coaxial Port: Male threaded brass fitting (top-mounted)
- Body Material: Brass / copper alloy
- Mounting: Rectangular bolt-pattern flanges on both ends
- Includes: Assembly only; no additional hardware or accessories
Applications
Waveguide pressure windows are used in microwave and RF transmission systems to seal and pressurize waveguide runs — typically with dry nitrogen or dry air — preventing moisture ingress that can cause arcing, corrosion, and signal degradation over time. WR90 is a standard rectangular waveguide size covering the X-band frequency range (8.2 to 12.4 GHz), widely used in radar systems, satellite ground stations, point-to-point microwave links, and defense/communications infrastructure. Andrew Corporation has been a leading manufacturer of waveguide components and antenna transmission line hardware, and their pressure window assemblies are found in both commercial telecom and government/military RF installations. This type of component sits at a transition point between waveguide sections or between a waveguide run and a coaxial feed, sealing the pressurized guide while passing the signal through a low-loss dielectric window.
This Andrew 55001-90 WR90 Pressure Window Assembly has been inspected and is in good used condition. The brass body shows surface oxidation and patina consistent with age and prior use, which is typical for this type of waveguide hardware. The waveguide flanges and apertures appear intact and undamaged. White tape seals are present on the rear waveguide port. The threaded coaxial fitting is present and appears in good shape. Please view our photo set and contact us if you have any questions. Please note: We have multiple units in stock — yours may not be the one shown in the photos, however, it will be similar in condition and function.
Warranty Information
Additional Information
Brand: |
Andrew |
Model: |
55001-90 |
MPN: |
55001-90 |
Type: |
Waveguide Pressure Window Assembly |
SKU: |
31946 |
Waveguide Size: |
WR90 |
Frequency Band: |
X-Band (8.2–12.4 GHz) |
Flange Type: |
Rectangular Waveguide Flange |
Flange I.D. (WR90 End): |
0.900 x 0.400 in |
Flange I.D. (Opposite End): |
0.960 x 0.580 in |
Coaxial Port: |
Male threaded coaxial fitting (brass) |
Material: |
Brass / Copper alloy |
Application: |
Waveguide pressurization, RF transmission |
Condition: |
Used – Inspected and in Good Condition |
Seller Notes: |
Unit only; no additional accessories included. |
Country/Region of Manufacture: |
United States |
Condition Notes: |
Andrew 55001-90 WR90 Pressure Window Assembly inspected and in good used condition. Brass body shows age-related oxidation/patina. Flanges and apertures intact. White tape on rear waveguide port. Coaxial fitting present and intact. |
California Prop 65 Warning: |
WARNING: This product can expose you to chemicals including lead and lead compounds, and DEHP (a phthalate), which are known to the State of California to cause cancer and birth defects or other reproductive harm. Go to P65Warnings.ca.gov |