Title:
マルチバンド高周波回路、マルチバンド高周波回路部品及びこれを用いたマルチバンド通信装置
Document Type and Number:
Japanese Patent JP4716047
Kind Code:
B2
Abstract:
A multiband high-frequency circuit comprising a first switch SPDT1 for switching the connections of a multiband antenna to transmitting circuits 11bg-T, 11a-T and receiving circuits 11bg-R, 11a-R of first and second communications systems, and a transmitting/receiving circuit BLT-TR of a third communications system, a diplexer circuit Dip1 for branching a high-frequency signal to 11a-R and 11bg-R or BLT-TR and a diplexer circuit Dip2 for branching a high-frequency signal to 11bg-T and 11a-T, both of which are disposed downstream of SPDT1, each diplexer circuit Dip1, Dip2 comprising a lower-frequency-side filter and a high-frequency-side filter, a bandpass filter BPF1 being disposed downstream of the lower-frequency-side filter of the diplexer circuit Dip1, and a second switch SPDT2 being disposed downstream of the bandpass filter BPF 1.
Inventors:
Shigeru Kamochi
Kazuhiro Hagiwara
Fukamachi Keisuke
Mitsuhiro Watanabe
Kazuhiro Hagiwara
Fukamachi Keisuke
Mitsuhiro Watanabe
Application Number:
JP2007521197A
Publication Date:
July 06, 2011
Filing Date:
April 11, 2006
Export Citation:
Assignee:
Hitachi Metals Co., Ltd.
International Classes:
H04B1/44; H04B1/40
Domestic Patent References:
| JP2003152588A | 2003-05-23 | |||
| JP2004007408A | 2004-01-08 | |||
| JP2004140696A | 2004-05-13 | |||
| JP2005064779A | 2005-03-10 |
Attorney, Agent or Firm:
Takaishi Tachibana