Title:
【発明の名称】スペクトル拡散通信用弾性表面波信号処理装置
Document Type and Number:
Japanese Patent JP3340635
Kind Code:
B2
Abstract:
A surface acoustic wave signal processing apparatus for processing first and second high-frequency signals having frequencies f1 and f2 respectively, which comprises: first and second surface acoustic wave delay elements for receiving the first and second high-frequency signals respectively and independently of each other, the delay elements being formed as surface acoustic wave excitation and reception transducers on a piezoelectric substrate so that a phase delay phi 1 with respect to the frequency f1 is substantially equal to a phase delay phi 2 with respect to the frequency f2 (that is, phi 1 APPROX phi 2); and a mixer for mixing first and second high-frequency output signals of the first and second surface acoustic wave delay elements so that a signal having a frequency |f1-f2| which is a difference between the two frequencies f1 and f2 is taken out as an output signal of the mixer.
Inventors:
Mitsutaka Hikita
Chisaki Takubo
Nobuhiko Shibagaki
Kazuyuki Sakiyama
Chisaki Takubo
Nobuhiko Shibagaki
Kazuyuki Sakiyama
Application Number:
JP31907796A
Publication Date:
November 05, 2002
Filing Date:
November 29, 1996
Export Citation:
Assignee:
株式会社日立製作所
International Classes:
H03H9/145; G06G7/195; H03H9/42; H03H9/72; H04B1/707; H04B1/7093; H04J13/00; (IPC1-7): H04B1/707; H03H9/145; H03H9/42; H03H9/72
Domestic Patent References:
| JP77456A | ||||
| JP51140443A | ||||
| JP11112467A |
Attorney, Agent or Firm:
Katsuo Ogawa (1 person outside)