Flann Microwave Advances Rotary Vane Attenuators from Manual to Programmable and Sub-Millimetric Designs
Flann Microwave has evolved its rotary vane attenuators (RVAs) from manual to programmable and sub-millimetric designs, enhancing automation and compactness for applications in aerospace, defense, and telecommunications. The new programmable WG26 RVAs improve testing efficiency, while the WM570 sub-millimetric version enables higher frequency attenuation in tight spaces. These advancements ensure precise signal strength adjustments critical for radar systems and scientific research.

Flann Microwave has developed rotary vane attenuators (RVAs) since its founding in 1956, evolving from manual units to programmable models in the late 1970s and sub-millimetric versions in the 2010s. RVAs are utilized in sectors including aerospace, defense, telecommunications, and scientific research for controlled signal attenuation.
The introduction of programmable WG26 RVAs enhanced automation in testing, while the WM570 sub-millimetric RVA allowed for higher frequency attenuation in compact waveguides. RVAs are integral to radar systems, microwave networks, and laboratory setups, enabling precise signal strength adjustments.
The devices operate by rotating a resistive vane within a circular waveguide, maintaining polarization and suppressing unwanted modes. Their consistent performance and predictable attenuation response underpin their continued use in both research and operational systems.




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