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High Frequency Switch
Abstract: A small high frequency switch that does not require an external control signal is provided. One end of the high frequency switch is connected to an antenna terminal (1) (a first high frequency signal input/output terminal) and the other end thereof is connected to a transmission terminal (2) (a second high frequency signal input/output terminal). Furthermore the high frequency switch comprises an antiparallel diode (4) (a first antiparallel diode) that is in a conducting state in the input electric power not less than the predetermined high frequency electric power. When the high frequency switch is a SPDT system the high frequency switch may comprise a quarter wave line (5) based on an operating frequency of the high frequency switch where one end thereof is connected to the antenna terminal (1) and the other end thereof is connected to a reception terminal (3) (a third high frequency signal input/output terminal) and an antiparallel diode (7) (a second antiparallel diode) that is connected to the reception terminal (3) and a ground (6) and is in a conducting state in the input electric power not less than the predetermined high frequency electric power.
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