100mm Waveguide Section with Gas Inlet

WR75 Pressurized Straight Waveguide for High Power and High Altitude Applications

This product is a professional Straight Waveguide featuring a gas inlet port for pressurization. The waveguide operates in the WR75 (BJ120) band and includes a built in gas inlet that allows the interior cavity to be filled with various gases. As a Pressurized Waveguide, it prevents high power arcing and breakdown, especially at high altitudes or in high peak power applications. The section length is 100mm, with custom lengths available upon request. The construction uses aluminum material with conductive oxidation and paint coating for durability. The interface is available as FBP120 or FBM120 flange options. Custom options are available upon request.

This pressurized straight waveguide delivers excellent electrical performance across its operating band. The Voltage Standing Wave Ratio (VSWR) is rated at 1.1, which shows very good impedance matching with minimal signal reflection. The insertion loss is very low, ensuring efficient signal transmission through the waveguide section. The gas inlet allows the interior to be filled with dry air or other gases to prevent arcing and breakdown. This pressurization is essential for high peak power transmission and high altitude operation where low air pressure creates risk of electrical discharge. The robust aluminum construction provides good mechanical strength and resists vibration and deformation. The conductive oxidation and paint coating provide protection against corrosion and environmental exposure.

One clear strength of this Pressurized Waveguide is its ability to prevent arcing in demanding high power environments. It is widely used in radar high power transmission links and traveling wave tube output feeder lines to solve the problems of high peak power transmission and long distance arcing. Other applications include broadcast television high power transmission stations, military ultra high power microwave transmission links, and high altitude remote RF base stations where low pressure environments create risk of breakdown. Pressurization prevents arcing and maintains reliable operation. These waveguides are also used in pulse high power test systems to ensure stable transmission without discharge interference. For naval shipboard high power microwave systems operating in high humidity and salt spray environments, pressurization prevents moisture ingress and corrosion, improving reliability.

In practical use, this Pressurized Waveguide handles professional high power transmission tasks very well. For radar systems operating at high peak power, it provides reliable transmission without arcing. For high altitude communication sites, pressurization compensates for low atmospheric pressure that would otherwise cause breakdown. For shipboard installations, dry gas pressurization prevents moisture from entering the waveguide, protecting against corrosion and arcing. The gas inlet allows easy connection to pressurization equipment. The standard flange interfaces mate securely with common WR75 components. It stands as a solid example of a well designed pressurized straight waveguide for reliable high power and high altitude RF transmission.