Saw wave-guides

Wave transmission lines and networks – Coupling networks – Electromechanical filter

Reexamination Certificate

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

C333S150000, C333S154000, C333S195000, C333S196000, C310S31300R, C310S31300R

Reexamination Certificate

active

06967545

ABSTRACT:
Surface acoustic wave (SAW) zebra-wave-guide (10) implemented as an array of interdigitized electrode fingers, wherein the array has internal inter-finger connectors (18) providing inside electrical shorting of part of fingers (16) remaining other fingers (14) to be isolated, moreover, the array (12) is bordered by important free surface spaces (15). Time delay and phase of the propagating SAW beam front are controlled by the varying of quantity of isolated fingers (14) of the zebra-wave-guide (10). Aggregation (40) of the parallel zebra-wave-guides having different quantities of isolated fingers (14) and different widths allows manipulations with narrow SAW beams' phases and magnitudes, that becomes helpful degree of freedom for desire transformation of the SAW beam (140). Aggregation (890) of bi-directional inter-digital transducer (IDT), U-type 3 dB MSC (85), pair of zebra-wave-guides (10and11) with different quantity of isolated fingers and IDT-wave-guide (847) represents a partially-unidirectional-combined-IDT (890), that may be utilized for a miniaturized low loss SAW filter design (800).

REFERENCES:
patent: 4350963 (1982-09-01), Iwamoto et al.
patent: 5111168 (1992-05-01), Panasik et al.
patent: 5999068 (1999-12-01), Tsutsumi et al.
patent: 6011344 (2000-01-01), Dufilie et al.
patent: 6057630 (2000-05-01), Yanagihara et al.
patent: 6114927 (2000-09-01), Matsuda et al.
patent: 6577210 (2003-06-01), Tsutsumi et al.
David P. Morgan, “Chapter 4: Analysis of Interdigital Transducers”,—book “Surface-Wave Devices For Signal Processing”, Elsevier Science Publishers B.V., 1985, pp. 57-105.
David P. Morgan, “Chapter 5: The Multi-Strip Coupler and Its Applications”,—book “Surface-Wave Devices For Signal Processing”, Elsevier Science Publishers B.V., 1985, pp. 107-127.
F.G. Marshall, C.O. Newtonand E.G. Paige, “SAW Multistrip Components and Their Applications”—IEEE Transactions on Sonics and Ultrasonics, vol. SU-20, No. 2, Apr. 1973 pp. 134-143.
T.I. Browning, F.G. Marshall, “Compact 130 Microsec SAW Delay Line Using Improved MSC Reflecting Transchangers”—IEEE Ultrasonic Symp., 1974, pp 189-192.
Plessky V.P., Kondratiev S.N., Stierlin R. and Nyffeler F. “SAW tags. New Ideas”—IEEE Ultrasonics Symposium—1995, vol. 1 Nov., 1995 pp. 117-120.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Saw wave-guides does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Saw wave-guides, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Saw wave-guides will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-3513386

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.