Title:
重み付けされた反射型グレーティングを用いたデュラルトラックSAW反射器フィルタ
Document Type and Number:
Japanese Patent JP4696312
Kind Code:
B2
Abstract:
A dual track SAW reflector filter (150) including a first track (152) and a second track (154). The first track and the second track (152, 154) include an input transducer (156, 164), an output transducer (158, 166), first reflectors (160, 168) and second reflectors (162, 170). The reflectivity function of the first reflectors (160, 168) and the second reflectors (162, 170) are equal in magnitude and opposite in phase. The input transducers (156,164) have the same polarity and the output transducers (158, 166) have opposite polarities. Surface acoustic waves produced by the input transducers (156, 164) and received directly by the output transducers (158, 166) are in phase and cancel at the output transducers (158, 166). Surface acoustic waves reflected by the reflectors (160, 162, 168 and 170) are in phase and add at the output transducers (158, 166).
Inventors:
David S Yip
Edward M Gerber
Alvin M Kong
Edward M Gerber
Alvin M Kong
Application Number:
JP2004044634A
Publication Date:
June 08, 2011
Filing Date:
February 20, 2004
Export Citation:
Assignee:
NORTHROP GRUMMAN SYSTEMS CORPORATION
International Classes:
H03H9/64; H03H9/145
Domestic Patent References:
| JP11186865A | ||||
| JP2001156577A | ||||
| JP5251986A | ||||
| JP10233646A |
Foreign References:
| US6836197 | ||||
| US5831494 | ||||
| US5406159 |
Attorney, Agent or Firm:
Shinjiro Ono
Yasushi Kobayashi
Akio Chiba
Hiroyuki Tomita
Kenichi Torii
Yasushi Kobayashi
Akio Chiba
Hiroyuki Tomita
Kenichi Torii