HIGH FREQUENCY AMPLIFIER
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United States of America
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Issued Date -
Apr 10, 2025
app pub date -
Aug 1, 2022
filing date -
Aug 1, 2022
priority date (Note) -
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Abstract
This high frequency amplifier includes: an amplifier that amplifies a high frequency signal; and an impedance adjustment unit that adjusts impedance relative to a high frequency wave as seen from the amplifier to a load side. The impedance adjustment unit includes a distributed constant circuit and a lumped constant circuit. The distributed constant circuit includes a transmission line that resonates with harmonics, and the lumped constant circuit includes a resonance circuit that resonates with a fundamental wave and harmonics other than the harmonics of the distributed constant circuit. One end of the transmission line of the distributed constant circuit is an open end, and is constituted from an open stub provided with a line length that resonates with various harmonics. The high frequency amplifier carries out filtering by adjusting the impedance of the fundamental wave and the harmonics without being provided with a fundamental wave 1/4 wavelength transmission line.
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