Saw circuit for generating continuous time-coherent RF carriers

Details Saw circuit for generating continuous time-coherent RF carriers Saw circuit for generating continuous time-coherent RF carriers

1988-07-05

1989-08-22

Tarcza, Thomas H.

Communications: directive radio wave systems and devices (e.g.,

With particular circuit

For frequency modulation

H01L 4108

Patent

active

048600172

ABSTRACT:
The surface acoustic wave device which generates two coherent signals from a single input. The inventive device has three interdigital transducers (IDT) spaced upon a single piezoelectric substrate. The central IDT has three sets of interdigital fingers.
A power splitter and an amplifier are connected between the central IDT and one of the other IDT's to form a recirculation loop. An input signal burst applied to the central IDT produces two coherent outputs at the remaining IDT and the power splitter.

REFERENCES:
patent: 4053889 (1977-10-01), Johnson
patent: 4543547 (1985-09-01), Picquendar et al.
patent: 4675839 (1987-06-01), Kerr
patent: 4801836 (1989-01-01), Mariani
"Correlation of Long Sequences Using a Saw Convolver and Recirculation Lo, by D. P. Morgan and J. M. Harrah, Proc. of 1975 IEEE Ultrasonics Symposium pp. 189-192.
"Introduction to Radar Systems", Second Edition, by Merrill I. Skolnik, pp. 420-434.

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