Patent ID: 6674645
Filing Date: 2004-01-06
Classification: H01P,H05K

Abstract:
A high frequency signal switching unit comprising:a casing; a printed circuit board accommodated in said casing and having a first surface and a second surface opposite to each other, said printed circuit board also having a ground layer formed on substantially the entire first surface; at least one input terminal and at least one output terminal both mounted on said casing; at least one high frequency relay mounted on said printed circuit board for switching between said input terminal and said output terminal so that a high frequency signal inputted into said input terminal is selectively outputted from said output terminal, said high frequency relay having a plurality of relay contact terminals and a grounding terminal; and a plurality of coaxial cables accommodated in said casing and having respective internal and external conductors for connecting said input and output terminals to said relay contact terminals of said high frequency relay; wherein said grounding terminal of said high frequency relay and said external conductors of said coaxial cables are connected to said ground layer of said printed circuit board, while each of said internal conductors of said coaxial cables is connected to one of said relay contact terminals of said high frequency relay; and wherein said printed circuit board has a plurality of recesses defined therein in which end portions of said coaxial cables are respectively received; said recesses having a depth that is determined such that said internal conductors are aligned with the second surface of said printed circuit board.