| 摘要 |
PURPOSE:To attain reduction in passing loss, coupling loss, etc., by obtaining excellent impedance characteristics by providing an earth conductor extending to a coupling transformer coupling a conductor coupling an input terminal with an output terminal, in addition to this conductor. CONSTITUTION:Input terminal 1 is coupled with output terminal 2 via a conductor and coupling transformer 6 is coupled with one part of this conductor. Namely, the conductor is passed through core 6a of transformer 6 composed of ring core 6a and coil 6b wound toroidally around core 6a and signals are branched by electromagnetic coupling between this conductor and coil 6b. Then, transformer 6 and this conductor are provided with earth conductor 7, which is connected electrically to a chassis near terminals 1 and 2. Consequently, impedance characteristics are improved and a passing loss and coupling loss can be reduced. |
