| 摘要 |
<p>A multiband high-frequency switching module in the form of a laminate body for use in a communication system utilizing a plurality of transmit-receive systems includes a band-separating circuit (2) and switching circuits (SW1, SW2) for the plurality of transmit-receive systems. The band-separating circuit (2) is constituted by filter circuits each comprising an LC circuit. One end of the band-separating circuit (2) is connected to a common antenna. One end of each switching circuit is connected to the band-separating circuit and the other end is connected in parallel to a receiving circuit and a transmitting circuit. Each switching circuit (SW1, SW2) comprises a switching element (DG1, DG2; DP1, DP2) and a transmission line (LG1, LG2; LP1, LP2). The laminate body comprises a plurality of dielectric layers, pattern electrodes printed on the dielectric layers, and chip elements mounted on a top surface of the laminate body. The switching elements (DG1, DG2; DP1, DP2) include a first switching element (DG1, DP1) having an anode connected to a line directed to a common antenna terminal (CAT) side and cathode connected to a line directed to the transmission circuit (TX1, TX2) side, and a second switching element (DG2, DP2) having an cathode connected to a line directed to the receiving circuit (RX1, RX2) side and a anode connected to a line directed to a ground terminal (GRD: 89). <IMAGE></p> |
