| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a high frequency compound component which attains a wide band matching in transmission bands and minimizes an insertion loss in a fundamental frequency band. <P>SOLUTION: In the high frequency compound component, a high frequency amplifier circuit and a high frequency switch circuit (antenna switch module) on the post-stage are connected via a phase adjusting circuit, and a phaseθ2 of impedance Z2 when watching the high frequency switch circuit side from a connection reference surface of the phase adjusting circuit is adjusted into areas from -125°to 90°, such that wide band matching in transmission bands is realized. Further, when a phase is defined asθ1 wherein a relation of impedance Z1 when watching the high frequency amplifier side from the connection reference surface and the impedance Z2 when watching the high frequency switch circuit side is a relation of conjugate matching of a phaseθof Z1, in the high frequency compound component, the phaseθ2 of the impedance Z2 is adjusted by overlappingθ2 on a range within the conjugate matching region ofθ1±90°in the required fundamental frequency band, such that the insertion loss may be also reduced. <P>COPYRIGHT: (C)2004,JPO</p> |
