Microwave frequency tunable filtering balun
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United States of America Patent
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Jul 1, 2014
Grant Date -
Aug 8, 2013
app pub date -
May 30, 2012
filing date -
Feb 6, 2012
priority date (Note) -
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Abstract
A microwave frequency tunable filtering balun is provided. The microwave frequency tunable filtering balun comprises a first microwave split ring transmission line resonator and a second microwave split ring transmission line resonator arranged in a bilaterally symmetrical manner, a fourth variable capacitor and a fifth variable capacitor of same parameters. It combines two functions of balun and tunable bandpass filter (BPF) into one circuit, resulting in a compact design. The balun characteristic and frequency-tuning mechanism are investigated, and the design equations are derived.
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