Title:
【発明の名称】低損失表面波フィルタ
Document Type and Number:
Japanese Patent JP3174052
Kind Code:
B2
Abstract:
PCT No. PCT/FR91/00308 Sec. 371 Date Sep. 23, 1992 Sec. 102(e) Date Sep. 23, 1992 PCT Filed Apr. 12, 1991 PCT Pub. No. WO91/16763 PCT Pub. Date Oct. 31, 1991.A low loss microwave surface acoustic wave filter, comprising input (2, 3) and output (4, 5) transducers, acoustically associated with coupling transducers (6, 7). The relative positions of the transducers 2 to 7) and of their O reflectors are chosen, having regard to the weightings of the coupling transducers (6, 7) in order to obtain the desired transfer function for this filter.
Inventors:
Dufilly, Pierre
Odo, Jean-Michel
Odo, Jean-Michel
Application Number:
JP50848991A
Publication Date:
June 11, 2001
Filing Date:
April 12, 1991
Export Citation:
Assignee:
Thomson-S.S.F.
International Classes:
H03H9/02; H03H9/145; H03H9/64; (IPC1-7): H03H9/64
Domestic Patent References:
| JP653772A | ||||
| JP60150312A |
Other References:
Ｃ Ｌ Ｗｓｅｔ：“ＳＡＷ ＣＯＮＶＯＬＶＥＲ ＥＭＰＬＯＹＩＮＧ ＵＮＩＤＩＲＥＣＴＩＯＮＡＬ ＴＲＡＮＳＤＵＣＥＲＳ ＦＯＲ ＩＭＰＲＯＶＥＤ ＥＦＦＩＣＨＩＥＮＣＹ”１９８２ ＵＬＴＲＡＳＯＮＩＣＳ ＳＹＭＰＯＳＩＵＭ ＰＲＯＣＥＥＤＩＮＧＳ，（Ｏｃｔｏｂｅｒ ２７−２９，１９８２）Ｖｏｌ．１ ｐ．１１９−１２３
Ｐｉｅｒｒｅ Ｄｕｆｉｌｉｅ 他：“Ａ ＬＯＷ ＬＯＳＳ ＨＩＧＨ ＰＥＲＦＯＲＭＡＮＣＥ ＦＩＬＴＥＲ ＳＴＲＵＣＴＵＲＥ”ＩＥＥＥ １９８８ ＵＬＴＲＡＳＯＮＩＣＳ ＳＹＭＰＯＳＩＵＭ ＰＲＯＥＥＤＩＮＧＳ，（Ｏｃｔｏｂｅｒ ２−５，１９８８）Ｖｏｌ．１ ｐ．１２７−１３０
Ｐｉｅｒｒｅ Ｄｕｆｉｌｉｅ 他：“Ａ ＬＯＷ ＬＯＳＳ ＨＩＧＨ ＰＥＲＦＯＲＭＡＮＣＥ ＦＩＬＴＥＲ ＳＴＲＵＣＴＵＲＥ”ＩＥＥＥ １９８８ ＵＬＴＲＡＳＯＮＩＣＳ ＳＹＭＰＯＳＩＵＭ ＰＲＯＥＥＤＩＮＧＳ，（Ｏｃｔｏｂｅｒ ２−５，１９８８）Ｖｏｌ．１ ｐ．１２７−１３０
Attorney, Agent or Firm:
Kazuo Sato (3 others)