| 摘要 |
PROBLEM TO BE SOLVED: To improve heat radiation performance of a substrate for a large power high-frequency signal flowing through a transmission path and connectability to GND, in a high-frequency power compositor or distributor called as a power switchable combiner/divider which is preferably embodied to a radio relay device of a high-frequency signal such as a terrestrial digital television broadcast or a cellular phone, connects one end of a single transmission path to one end of a branch transmission path, and is provided with a switch for opening/closing the high-frequency signal on each branch transmission path. SOLUTION: A conductive plate 58 made of a metallic mass is provided on the rear surface of a substrate 55. In this conductive plate 58 for heat radiation for a switch SW, fixing of the substrate 55 is performed by screwing a screw into a first screw hole 71 of the front surface of the substrate 55, and fixing to a case 54 is performed screwing of a screw 73 into a second screw hole 72 of the rear surface side. That means, the screw holes 71, 72 are formed on the same position. Accordingly, the connectability to the GND can be improved through the portion around the communicating screw holes 71, 72. COPYRIGHT: (C)2006,JPO&NCIPI |
