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Waveguide Pressure Windows

Waveguide pressure windows are critical components designed to seal waveguide systems while allowing electromagnetic signals to pass through with minimal attenuation. They are used to maintain pressure differentials and prevent environmental contaminants from entering the system, essential in applications such as radar, satellite communications, and research facilities, ensuring system integrity and performance.

Rectangular Waveguide Pressure Window

Seal the waveguide and keep the RF path continuous

Used where a waveguide section must stay sealed against pressure, moisture, dirt or dust while microwave energy passes through. Standard and custom configurations are selected by frequency, WR size, pressure, power, window material and flange interface.

Dolph Microwave waveguide pressure window
0.32–112 GHz
Published product-page range
WR-2300–WR-10
Published size coverage
0.2 dB
Typical insertion loss in overview data
Up to 70 psi
Pressure figure stated in overview
Published ratings are configuration-dependent. The standard model matrix below lists VSWR max. 1.15:1 and pressure up to 45 PSIG by model, while the product overview separately states max. VSWR 1.2:1, typical 0.2 dB insertion loss and sealing as high as 70 psi. Final order data should follow the selected model and approved drawing.
Published Product Data

The data used to match your waveguide line

Frequency & waveguide range
0.32 to 112 GHz; WR-2300 to WR-10; standard rectangular range BJ3 to BJ900.
RF performance
Product overview: max VSWR 1.2:1 and typical insertion loss 0.2 dB.
Window material
Overview lists Cooper-Clad / Teflon-Fiberglass. The model matrix lists Teflon/Fiberglass/Ceramics.
Flange options
Cover, Standard; Choke available. Model-specific flange designations are listed in the table.
Construction
Overview lists Oxygen Free Hard Copper/Copper Alloy; table configurations include Al and Al/Cu.
Typical use
Radar, satellite communications, military systems, telecommunications, research and test facilities.
For a Fast Technical Quote

Send the conditions that change the build

A drawing helps, but the basic interface data is enough to start model selection.

01
Frequency range
02
WR / BJ size
03
Operating & max pressure
04
CW / peak power
05
Flanges both ends
06
Material / finish
07
Temperature
08
Quantity / drawing
Standard Model Range

Waveguide Pressure Windows

Model, frequency, pressure, power, window material, flange, material and finish data are shown below.

On mobile, swipe the table horizontally.
MODEL FREQ. RANGE (GHz) WG SIZE VSWR Max. PRESSURE (PSIG) AVG POWER (W) WINDOW MATERIAL FLANGE TYPE MATERAL FINISH DATASHEET
COVER GROOVED PDF STEP
DH-9WAL…0.76-1.15WR9751.15:1Up to 45Up to 3000Teflon/Fiberglass/CeramicsUDR9PDR9AlChromatePDFSTEP
DH-12WAL…0.96-1.46WR7701.15:1Up to 45Up to 3000Teflon/Fiberglass/CeramicsUDR12PDR12AlChromatePDFSTEP
DH-14WAL…1.13-1.73WR6501.15:1Up to 45Up to 1000Teflon/Fiberglass/CeramicsUDR14PDR14AlChromatePDFSTEP
DH-18WAL…1.45-2.2WR5101.15:1Up to 45Up to 1000Teflon/Fiberglass/CeramicsUDR18PDR18AlChromatePDFSTEP
DH-22WAL…1.72-2.61WR4301.15:1Up to 45Up to 1000Teflon/Fiberglass/CeramicsUDR22PDR22AlChromatePDFSTEP
DH-26WAL…2.17-3.3WR3401.15:1Up to 45Up to 1000Teflon/Fiberglass/CeramicsUDR26PDR26AlChromatePDFSTEP
DH-32WAL…2.6-3.95WR2841.15:1Up to 45Up to 1000Teflon/Fiberglass/CeramicsUDR32PDR32Al/CuChromatePDFSTEP
DH-40WAL…3.22-4.9WR2291.15:1Up to 45Up to 1000Teflon/Fiberglass/CeramicsUDR40PDR40Al/CuChromatePDFSTEP
DH-48WAL…3.94-5.99WR1871.15:1Up to 45Up to 1000Teflon/Fiberglass/CeramicsUDR48PDR348Al/CuChromatePDFSTEP
DH-58WAL…4.64-7.05WR1591.15:1Up to 45Up to 1000Teflon/Fiberglass/CeramicsUDR58PDR58Al/CuChromatePDFSTEP
DH-70WAL…5.38-8.17WR1371.15:1Up to 45Up to 1000Teflon/Fiberglass/CeramicsUDR70PDR70Al/CuChromatePDFSTEP
DH-84WAL…6.57-9.99WR1121.15:1Up to 45Up to 1000Teflon/Fiberglass/CeramicsUDR84/UBR84PDR84/PBR84Al/CuChromatePDFSTEP
DH-100WAL…8.2-12.5WR901.15:1Up to 45Up to 1000Teflon/Fiberglass/CeramicsUDR100/UBR100PDR100/PBR100Al/CuChromatePDFSTEP
DH-120WAL…9.84-15WR751.15:1Up to 45Up to 800Teflon/Fiberglass/CeramicsUBR120PBR120Al/CuChromatePDFSTEP
DH-140WAL…11.9-18WR621.15:1Up to 45Up to 800Teflon/Fiberglass/CeramicsUBR140PBR140Al/CuChromatePDFSTEP
DH-180WAL…14.5-22WR511.15:1Up to 45Up to 800Teflon/Fiberglass/CeramicsUBR180PBR180Al/CuChromatePDFSTEP
DH-220WAL…17.6-26.7WR421.15:1Up to 45Up to 800Teflon/Fiberglass/CeramicsUBR220PBR220Al/CuChromatePDFSTEP
DH-260WAL…21.7-33WR341.15:1Up to 45Up to 500Teflon/Fiberglass/CeramicsUBR260PBR260Al/CuChromatePDFSTEP
DH-320WAL…26.3-40WR281.15:1Up to 45Up to 500Teflon/Fiberglass/CeramicsUBR320PBR320Al/CuChromatePDFSTEP
DH-400WAL…32.9-50.1WR221.15:1Up to 45Up to 100Teflon/Fiberglass/CeramicsFUGP400/UG-383U/MAl/CuChromatePDFSTEP
DH-500WAL…39.2-59.6WR191.15:1Up to 45Up to 100Teflon/Fiberglass/CeramicsFUGP500/UG-383U/MAl/CuChromatePDFSTEP
DH-620WAL…49.8-75.8WR151.15:1Up to 45Up to 100Teflon/Fiberglass/CeramicsFUGP620/UG-385U/MAl/CuChromatePDFSTEP
DH-740WAL…60.5-91.9WR121.15:1Up to 45Up to 100Teflon/Fiberglass/CeramicsFUGP740/UG-387U/MAl/CuChromatePDFSTEP
DH-900WAL…73.8-112WR101.15:1Up to 45Up to 100Teflon/Fiberglass/CeramicsFUGP900/UG-387U/MAl/CuChromatePDFSTEP
Part Number Guide
DH-100WPW10PMA600
“100” — Waveguide Size | WR90
“WPW” — Waveguide Type | Waveguide Pressure Windows
“10” — Thickness | 10 mm
“P” — Flange Type | Rectangular Flat
“M” — Flange Type | Rectangular Grooved
“A/C” — Material | Aluminium, Cu
“600” — Handling Power | 600 W CW.

Note: All Dolph-MW models include an surtec/corrosion protection treatment and are painted flat black. Flanges are unplated, polished and surtec. Other finishes and paint colors are available upon request.

Engineering Documents

Keep the product sheet and flange reference with the RFQ

The downloadable pressure-window sheet covers the WPW series and ordering information. The flange document gives Dolph flange designations against standard waveguide sizes.

Published WR340 Build Example

2450 MHz, 30 PSI, 10 kW configuration

This is a specific published high-power configuration, not a blanket rating for every pressure-window model.

Model
DH-26WPW16
WG Size
WR340
Frequency
2.45 GHz ± 25 MHz
VSWR
1.5 Max
Average Power
10 KW
Pressure
30 PSI Max
Window Material
Quartz
Flange
FDP26 / FDM26
Finish
Chromate
Material
Aluminum
Operating Temperature
-20℃–80℃
Size
138 × 95 × 16 mm
How We Support the Build

From interface review to a finished waveguide part

Dolph’s manufacturing page lists CNC machining, turning, waveguide forming and bending, plating, soldering and brazing of copper/copper alloys/aluminum, plus anodising and passivation (RoHS).

For procurement documents or special inspection requirements, include them with the RFQ so they can be reviewed against the selected configuration.
01
Review the interface
Frequency, WR size, pressure, power, flange and drawing.
02
Match standard or custom
Confirm model range, material, window and flange combination.
03
Confirm the drawing
Use the agreed mechanical and electrical requirements for production.
04
Build and inspect
Manufacture and verify against the agreed project data before shipment.
Pressure-Sealed Waveguide System

Related parts and engineering references

Waveguide Pressure Inlets
Add the gas connection and pressure-control interface to the waveguide line.
Waveguide Gasket & O-Ring
Match the sealing method to flange type and pressure/RF sealing requirements.
Double-Ridge Pressure Window
For projects using WRD-series double-ridge waveguide instead of standard rectangular waveguide.
Industrial Microwave Components
High-power 915 MHz and 2450 MHz component families and custom system parts.
Commercial & Quality Information

What procurement can verify

Dolph’s About page states that the company was founded in 2001 and that its Quality Manual and Quality Procedure use ISO 9001-2015. Manufacturing information lists anodising and passivation (RoHS) among its capabilities.

If your order requires a currently valid certificate or project-specific compliance document, request the latest copy from sales before purchase approval.

1-Year Product Warranty

Dolph Microwave warrants products against defective material and workmanship for one year from the date of delivery, subject to the warranty terms published on the site.

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