US PATENT SUBCLASS 343 / 780
.~.~ "Pillbox" type


Current as of: June, 1999
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343 /   HD   COMMUNICATIONS: RADIO WAVE ANTENNAS

700 R  DF  ANTENNAS {58}
772  DF  .~ Wave guide type (e.g., horn) {8}
780.~.~ "Pillbox" type


DEFINITION

Classification: 343/780

(under subclass 772) Subject matter wherein the wave guide includes two parallel plates which are closed along a portion of their perimeter by a reflector, the spacing between the plates being small compared to their surface dimensions, the plates being electrically open to free space over a relatively large portion of their perimeter.

SEE OR SEARCH THIS CLASS, SUBCLASS:

781+, for wave guide type antennas with a reflector or director.

834+, and Search Notes thereunder, for antennas with parasitic reflectors in general.

912+, for reflectors or directors, per se.