Waveguide Pressure Inlets

Product Overview​​

Dolph Microwave’s Double-Ridge Waveguide Pressure Inlets are precision-engineered components designed for pressurizing waveguide systems with clean air or inert gases, ensuring optimal signal integrity in high-frequency applications. These units support a broad frequency range from 0.84 GHz to 40 GHz, with ultra-low VSWR (1.05:1) to minimize signal loss. Constructed from corrosion-resistant aluminum or copper alloys, they are compatible with pneumatic tubing O.D. sizes of 4–16 mm and feature 1/8″ NPT female inlets for seamless integration. Ideal for mission-critical environments, these inlets maintain pressures up to 150 PSI (customizable) and are available in short-length or gauge-equipped configurations for real-time monitoring.

​​Key Features​​

Engineered for versatility, Dolph Microwave’s pressure inlets support multiple flange types (rectangular flat/grooved) and gas valve connectors, including Schrader valves, Pagoda connectors, and push-in fittings. Their compact design accommodates lengths from 19 mm (flange spacers) to 152 mm (full pressurizing sections), while Surtec-coated finishes ensure durability in harsh conditions. Optional pressure gauges enable continuous system monitoring, and custom configurations are available for specialized flange types, materials, or paint finishes.

​​Applications​​

These pressure inlets are integral to radar systems, satellite communications, and aerospace platforms, where maintaining waveguide pressure is critical to preventing moisture ingress and arcing. They are also widely used in telecommunications infrastructure, scientific research setups, and high-power RF systems requiring stable gas purging.

​​Specifications & Customization​​

• ​​Frequency Range:​​ 0.84–40 GHz (model-dependent, e.g., DH-180DRWPI… covers 18–40 GHz).
• ​​Waveguide Sizes:​​ WRD840 to WRD180, tailored for double-ridge waveguide compatibility.
• ​​Connectors:​​ 1/8″–1/2″ NPT threads; Schrader valves, Pagoda, or push-in fittings.
• ​​Materials:​​ Aluminum (standard), copper (optional), with Surtec anti-corrosion treatment.
• ​​Flange Types:​​ FPWRD (flat) or FMWRD (grooved); custom flanges upon request.

​​Technical Notes​​

Each unit undergoes rigorous testing to comply with MIL-STD-348A standards for waveguide performance. For example, the DH-650DRWPISVSG152PMA model includes a 152 mm pressurizing section with a Schrader valve and integrated pressure gauge, designed for 6.5–18 GHz systems. Dolph Microwave also offers corrosion-resistant coatings in flat black (standard) or custom colors for aesthetic or environmental requirements.