发明名称 |
Antenna duplexer, design method for antenna duplexer, production method for antenna duplexer, and communication apparatus using the same |
摘要 |
An antenna duplexer including: a transmission filter, a reception filter, phase-shift circuits of adjusting phase characteristics on a transmission side and a reception side; and a junction point of connecting an antenna, wherein (1) an absolute value theta1 of a difference between a first phase at a predetermined frequency of a pass band of the first filter and a second phase at the predetermined frequency at the time when the reception filter side is viewed from the junction point and (2) an absolute value theta2 of a difference between a third phase at a predetermined frequency of a pass band of the reception filter and a fourth phase at the predetermined frequency at the time when the transmission filter side is viewed from the junction point is included in a range of 100 degrees or more and 170 degrees or less.
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申请公布号 |
US2004251987(A1) |
申请公布日期 |
2004.12.16 |
申请号 |
US20040829762 |
申请日期 |
2004.04.22 |
申请人 |
NAKAMURA HIROYUKI;SEKI SHUN-ICHI |
发明人 |
NAKAMURA HIROYUKI;SEKI SHUN-ICHI |
分类号 |
H01P1/213;H04B1/52;(IPC1-7):H03H9/72 |
主分类号 |
H01P1/213 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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