Patent ID: 9030252
Filing Date: 2015-05-12
Classification: H01P,H03K

Abstract:
1. A high frequency switch device comprising: an input terminal that inputs a high frequency from outside; a plurality of output terminals that output, to outside, the high frequency inputted to the input terminal; a plurality of branch transmission lines that are respectively provided to the output terminals and are each adapted to transmit, to the corresponding output terminal, the high frequency inputted to the input terminal; and a plurality of switching units that are respectively provided to the branch transmission lines, each of the switching units is adapted to switch between an ON state which allows a high frequency to flow through the corresponding branch transmission line, and an OFF state which does not allow a high frequency to flow through the corresponding branch transmission line, wherein the high frequency switch device controls the switching units so as to switch the output terminal, from which high frequency is outputted, each switching unit includes a transmission side diode that is provided in the branch transmission line in such a manner that a cathode thereof is arranged on a side of the input terminal and an anode thereof is arranged on a side of the output terminal, and a ground side diode that is provided in such a manner that a cathode thereof is grounded and an anode thereof is electrically connected between the output terminal and the transmission side diode in the branch transmission line, each branch transmission line includes a first capacitor and a second capacitor on the side of the output terminal from the transmission side diode in such a manner that the anode of the ground side diode is connected between the first capacitor and the second capacitor, and the high frequency switch device further comprises an input side ground line for grounding the input terminal, and the input side ground line branches into a plurality of branch ground lines which are different in electrical length from one another and are respectively grounded.