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AssigneeMatsushita Electric Industrial Co., Ltd.
InventorsShoichi Kitazawa, Masaharu Tanaka, Toshio Ishizaki, Toru Yamada
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A high frequency switch, has a transmitting terminal; a receiving terminal; an antenna terminal; a first diode having an anode electrically connected to the transmitting terminal and a cathode electrically connected to the antenna terminal; a second diode having an anode connected through a transmission line of ¼ wavelength to the antenna terminal which is electrically connected to the receiving terminal, and having the side of a cathode grounded; and a control terminal provided to a node between the transmitting terminal and the first anode, wherein the first and second diodes have a tradeoff relationship between ON resistance thereof and capacitance between the anode and the cathode, and the ON resistance of the first diode is lower than the ON resistance of the second diode, and the capacitance of the second diode in the OFF state is smaller than the capacitance of the first diode in the OFF state.
A high frequency switch, comprising:
The high frequency switch according to any one of claims from 1 to 3, further comprising an inductor element or a series circuit of LC connected in parallel with said first diode.
The high frequency switch according to any one of claims from 1 to 3, further comprising a capacitor element or a parallel circuit of LC connected in series with said second diode.
Dependencies are inferred from the claim text.