| 摘要 |
PROBLEM TO BE SOLVED: To improve the high frequency isolation characteristic of an antenna duplexer. SOLUTION: The antenna duplexer is configured such that one end of a shield line 12 provided on a piezoelectric substrate 2 for forming the antenna duplexer is connected to a ground and the other end is formed to be an open end, and the open end is capacitively coupled (14) to an unnecessary coupling path 13 formed between a transmission terminal 7 and a reception terminal 8, so that the isolation characteristic can be improved. COPYRIGHT: (C)2007,JPO&INPIT
|
