US PATENT SUBCLASS 342 / 152-- .~.~ With quadrature difference processing

US PATENT SUBCLASS 342 / 152
.~.~ With quadrature difference processing

Current as of: June, 1999
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342 /	HD	COMMUNICATIONS: DIRECTIVE RADIO WAVE SYSTEMS AND DEVICES (E.G., RADAR, RADIO NAVIGATION)

147	DF	DETERMINING DIRECTION {6}
149	DF	.~ Monopulse {5}
152		.~.~ With quadrature difference processing

DEFINITION

Classification: 342/152

With quadrature difference processing:

(under subclass 149) Subject matter wherein the "in phase" sum signal is combined with the "quadrature" phase difference signals.

(1) Note. "In phase" signals have the same frequency and pass through their maximum and minimum vales of like polarity at the same instant.

(2) Note. "Quadrature" signals exist when the phase difference between them and the "in phase" signals is one-fourth of a period of 90 degrees.

SEE OR SEARCH THIS CLASS, SUBCLASS:

194, for complex signal circuitry having means to separate returned radar signals into "in phase" and "quadrature" components.