Patent ID: 8818298
Filing Date: 2014-08-26
Classification: H03K,H04B

Abstract:
1. A high frequency switch comprising: at least one first port connected to a time division duplex system to input or output a high frequency signal; at least one second port connected to a frequency division duplex system to input or output the high frequency signal; a common port transmitting or receiving the high frequency signal input or output through the first or second port; a first series switch including at least one first field effect transistor (FET) and allowing the high frequency signal to be conducted or preventing the high frequency signal from being conducted between the first port and the common port according to a voltage applied to a first gate resistor connected to a gate of the first FET; and a second series switch including at least one second FET and allowing the high frequency signal to be conducted or preventing the high frequency signal from being conducted between the second port and the common port according to a voltage applied to a second gate resistor connected to a gate of the second FET and having a resistance value larger than that of the first gate resistor.