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TW366629B - Filter device and dual-band radio system in which the filter device is used - Google Patents

Filter device and dual-band radio system in which the filter device is used

Info

Publication number
TW366629B
TW366629B TW085110250A TW85110250A TW366629B TW 366629 B TW366629 B TW 366629B TW 085110250 A TW085110250 A TW 085110250A TW 85110250 A TW85110250 A TW 85110250A TW 366629 B TW366629 B TW 366629B
Authority
TW
Taiwan
Prior art keywords
filter elements
filter device
matching unit
phase matching
filter
Prior art date
Application number
TW085110250A
Other languages
Chinese (zh)
Inventor
Masanori Ueda
Osamu Ikata
Hideki Ohmori
Yoshiro Fujiwara
Kazushi Hashimoto
Original Assignee
Fujitsu Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from JP8089632A external-priority patent/JPH09121138A/en
Application filed by Fujitsu Ltd filed Critical Fujitsu Ltd
Application granted granted Critical
Publication of TW366629B publication Critical patent/TW366629B/en

Links

Landscapes

  • Surface Acoustic Wave Elements And Circuit Networks Thereof (AREA)

Abstract

A filter device includes at least two filter elements, provided in a package, each of the filter elements passing only signals within a predetermined frequency band, the predetermined frequency bands of the at least two filter elements having center frequencies which are distinct from each other. An input terminal connected to and shared by respective inputs of the filter elements. An output terminal connected to and shared by respective outputs of the at least two filter elements. At least one of a first phase matching unit and a second phase matching unit, the first phase matching unit provided between the input terminal and the inputs of the filter elements, and the second phase matching unit provided between the output terminal and the outputs of the filter elements. In the filter device, the filter elements and at least one of the filter phase matching unit and the second phase matching unit are packaged on a surface of the package.
TW085110250A 1996-04-11 1996-08-22 Filter device and dual-band radio system in which the filter device is used TW366629B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8089632A JPH09121138A (en) 1995-08-24 1996-04-11 Filter device and wireless device using the same

Publications (1)

Publication Number Publication Date
TW366629B true TW366629B (en) 1999-08-11

Family

ID=57941162

Family Applications (1)

Application Number Title Priority Date Filing Date
TW085110250A TW366629B (en) 1996-04-11 1996-08-22 Filter device and dual-band radio system in which the filter device is used

Country Status (1)

Country Link
TW (1) TW366629B (en)

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Legal Events

Date Code Title Description
MM4A Annulment or lapse of patent due to non-payment of fees