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Automatic Microwave Q Measurement for Determination of Small Attenuations

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1 Author(s)

The Q's of a waveguide transmission cavity with and without insertion of a length of waveguide give the insertion loss. Least-squares fitting of transmission versus frequency data have been used to determine Q and resonant frequency fr with computer-controlled equipment in an iterative process. Preliminary values of Q and fr are used to calculate an improved set of test frequencies, and so on. A rapid least-squares method is described which minimizes truncation errors.

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Microwave Theory and Techniques, IEEE Transactions on  (Volume:20 ,  Issue: 1 )