US PATENT SUBCLASS 343 / 729
.~ Plural diverse-type antennas using same active element


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

700 R  DF  ANTENNAS {58}
729.~ Plural diverse-type antennas using same active element {1}
730  DF  .~.~> Including balanced doublet-type antenna


DEFINITION

Classification: 343/729

(under subclass 700) Subject matter including two antennas each of different type, whose active radio wave radiating or collecting elements are at least partly in common.

(1) Note. For a construction of the term "of different type" see (1) Note under subclass 725 above.

(2) Note. The term "active radio wave radiating or collecting elements" does not include reflector structure, coupling structure, or support structure. When such structures are involved, classification is in subclasses 725+ above, if the antennas are of different type.

(3) Note. For classification in this subclass, there must be a plurality of antennas. A single antenna composed of structurally different active parts is not here classified. For example, a sleeve type antenna with a rod coaxial with the sleeve, the rod and sleeve being connected to opposite terminals of the same line, does not constitute a plurality of antennas, and is classified in subclass 791, below. If each of a plurality of active elements with the common portion is able to function independently in its usual manner without the other a plurality of antennas may be present. Separate terminals or lead-in lines particularly with the transmission of a plurality of signals, is also indicative of a plurality of antennas. It may be noted that the utilization of one antenna by another as its feed does not preclude classification here.

SEE OR SEARCH THIS CLASS, SUBCLASS:

725+, and the search notes thereunder, for plural separate diverse type antennas and for subject matter pertinent to plural diverse type antennas, respectively.

791, for a single antenna composed of a sleeve and a rod. See also (3) Note, above.