Dolph Microwave manufactures a series of high-performance Waveguide Flange Shim, applying to a rectangular waveguide type, flat rectangular, moderately flat rectangle, square,round, single ridged and double ridged standard type, etc. The frequency range is from 0.3 to 110 GHz. The standard rectangular waveguide range from BJ3 to BJ900, the typical VSWR is 1.03 over the full waveguide bandwidth, a typical insertion loss is 0.1 dB.
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