NASA NTRS · 19900000445
Directional Couplers For Detecting Circular Waveguide Modes
Abstract
Samples of TE11 and TE12 modes coupled selectively out of circular waveguide. Report presents additional details of theory, construction, and measured operating characteristics of directional couplers described in "Microwave Transmitter With Multimode Output Section" (NPO-16826). Couplers consist of tapered rectangular-cross-section waveguides fastened lengthwise to outside of circular waveguide, with uniformly-lengthwise-spaced round coupling holes between each rectangular waveguide and circular waveguide.
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Hoppe, Daniel J.. 1990-09-01. Directional Couplers For Detecting Circular Waveguide Modes. https://ntrs.nasa.gov/citations/19900000445
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