Title:
TRANSMISSION/RECEPTION BRANCHING FILTER
Document Type and Number:
Japanese Patent JP3465225
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a transmission reception branching filter that restrictions caused when it is mounted on a device can be excluded by arranging the direction of a waveguide interface of all ports of an antenna port and transmission/ reception port and respective ports can be made close to each other.
SOLUTION: A transmission/reception branching filter adopts a configuration such that using an E-plane T-branch 16 connects transmission reception ends 10, 11 having an H-plane T-branch structure with an antenna end 9. Thus, the antenna end 9 can use the H-plane T-branch so that the transmission/ reception ports 3, 4 and the antenna port 2 can be arranged in the same direction. Furthermore, the transmission/reception ports 3, 4 and the antenna port 2 can physically be set close to each other.
Inventors:
Kiyotake Sasaki
Application Number:
JP32041899A
Publication Date:
November 10, 2003
Filing Date:
November 11, 1999
Export Citation:
Assignee:
NEC Engineering Co., Ltd.
International Classes:
H01P1/213; H01P1/208; (IPC1-7): H01P1/213; H01P1/208
Other References:
【文献】梅津圭一 上田澄生 池田明寛,アイリス構造を用いたRバンドデュープレクサ,1996年電子情報通信学会総合大会,日本,電子情報通信学会,1996年 3月 1日,C-123
Attorney, Agent or Firm:
▲柳▼川 信