| 摘要 |
<P>PROBLEM TO BE SOLVED: To suppress coupling amount fluctuation due to a manufacture error in a coupler constituted of a tri-plate line. <P>SOLUTION: The coupler includes: a dielectric substrate; a first dielectric layer arranged on a front surface side of the dielectric substrate; a first ground conductor installed on the first dielectric layer; a second dielectric layer installed on a rear surface side of the dielectric substrate; and a second ground conductor arranged on the second dielectric layer. The dielectric substrate includes: a main line and a coupling line, which are formed on the front surface; and a first auxiliary coupling line and a second auxiliary coupling line, which are formed on the rear surface. The main line is connected between an input terminal and a passing signal output terminal. The first auxiliary coupling line is electrically coupled to the main line. The coupling line is connected between a coupling signal output terminal and an isolation terminal. The second auxiliary coupling line is electrically connected to the coupling line. The first auxiliary coupling line and the second auxiliary coupling line are formed in a loop shape, and the first auxiliary coupling line and the second auxiliary coupling line are electrically connected. <P>COPYRIGHT: (C)2013,JPO&INPIT |
