Patent ID: 6731184
Filing Date: 2004-05-04
Classification: H04B

Abstract:
A high frequency switching component for being connected to a transmission circuit, a reception circuit, and an antenna to be used for switching either to a state in which the transmission circuit is connected to the antenna, or a state in which the reception circuit is connected to the antenna, the high frequency switching component comprising:a multilayer circuit board, on which there is formed a circuit including: a transmission circuit terminal to be connected to the transmission circuit; a reception circuit terminal to be connected to the reception circuit; an antenna terminal to be connected to the antenna; a ground terminal; a first diode connected to the transmission circuit terminal and to the antenna terminal; a second diode connected to the reception circuit terminal and to the ground terminal; a signal line for connecting the transmission circuit terminal, the reception circuit terminal, and the antenna terminal via the first diode; and an inductor disposed between the signal line and the ground terminal which is effective to eliminate an electrostatic surge occurring on the signal line, the inductor being provided by a line electrode disposed inside the multilayer circuit board; wherein the transmission circuit terminal, the reception circuit terminal, the antenna terminal, the ground terminal, the first diode, and the second diode are disposed on a surface of the multilayer circuit board; at least a part of the signal line is disposed inside the multilayer circuit board; and the inductor is opposed to a around electrode provided adjacent to the bottom surface of the multilayer circuit board.