US PATENT SUBCLASS 342 / 426
.~.~.~.~ Step track antenna type

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

350  DF  DIRECTIVE {10}
385  DF  .~ Beacon or receiver {2}
417  DF  .~.~ Direction-finding receiver only {14}
422  DF  .~.~.~ With self-orienting antenna pattern {4}
426.~.~.~.~ Step track antenna type

DEFINITION

Classification: 342/426

Step track antenna type:

(under subclass 422) Subject matter wherein the antenna of the receiver is aimed at a signal source through rotation in discrete angular steps about an axis.

(1) Note. The direction of the antenna rotation is controlled usually by signals developed from incoming signal strength comparison.