Surface acoustic wave device for band-pass filter having small i

Details Surface acoustic wave device for band-pass filter having small i Surface acoustic wave device for band-pass filter having small i

1992-03-13

1994-04-05

Pascal, Robert J.

Wave transmission lines and networks

Coupling networks

Electromechanical filter

333195, 310313R, H03H 964

Patent

active

053009029

ABSTRACT:
A surface acoustic wave device comprises a pair of multiple-electrode surface acoustic wave elements that are mirror-symmetrically arranged and disposed on a piezoelectric substrate. Each of the multiple-electrode surface acoustic wave elements comprises a plurality of input/output inter-digital transducers and connected inter-digital transducers. The number of the input/output inter-digital transducers is equal to or smaller by one, than the number of the connected inter-digital transducers, so that insertion loss of the surface acoustic wave device can be reduced without increasing the size of the device.

REFERENCES:
patent: 4468642 (1984-08-01), Hikita
patent: 4492940 (1985-01-01), Hikita
patent: 4939487 (1990-07-01), Yuhara et al.
patent: 5087901 (1992-02-01), Kurosawa et al.
patent: 5130681 (1992-07-01), Ohnuki et al.
M. Hikita et al., "High performance SAW filters with several new technologies for cellular radio," IEEE 1984 Ultrasonics Symposium, vol. 1, Nov. 16, 1984, Dallas, Tex., pp. 82-92.
M. Lewis "SAW Filters Employing Interdigitated Interdigital Transducers, IIDT" Ultrasonics Symposium Proceedings, circa 1982 (pp. 12-17).
M. Hikita et al. "800 MHz Low Loss SAW Filter".
Institute of Electronics, Information and Communication Engineerings of Japan Technical Study Report, US81-22 (pp. 25-31), circa 1981.
M. Sakamoto et al. "Surface Acoustic Wave (SAW) Filter" Electronics Material, May, 1988, (pp. 120-124).

Affiliated with

Also associated with

Rating

Surface acoustic wave device for band-pass filter having small i does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Surface acoustic wave device for band-pass filter having small i, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Surface acoustic wave device for band-pass filter having small i will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-514519