US PATENT SUBCLASS 343 / 801
.~.~ Three or more collinear units form doublet


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

700 R  DF  ANTENNAS {58}
793  DF  .~ Balanced doublet - centerfed (e.g., dipole) {17}
801.~.~ Three or more collinear units form doublet


DEFINITION

Classification: 343/801

(under subclass 793) Subject matter wherein the active conductive masses are of elongated shape and are longitudinally divided into at least three discrete portions which are substantially aligned along their longitudinal axes.

(1) Note. The break at the antenna terminals may constitute one of the longitudinal divisions. The divisions (between discrete collinear portions) usually include some phasing means (e.g., a long line) to shift the phase between the separate portions.

(2) Note. Subject matter involving plural collinear doublets each as herein defined wherein the respective portions are cross-connected, instead of the respective doublets having their respective portions connected in series, is classified herein.

(3) Note. Subject matter wherein collinear doublets as

herein defined have lumped reactance means between portions as for loading is classified in subclasses 749+, above; while where distributed reactance is included between portions, such subject matter is classified herein.

SEE OR SEARCH THIS CLASS, SUBCLASS:

722, for antennas with lumped reactance filters between antenna portions. 749+, for antennas with lumped reactance for loading. See (3) Note, above.

802, for doublet antennas with distributed reactance added to the arms.

813, for doublet antenna arrays in a parallel and collinear arrangement.

824, for planar arrays of linear antennas.

827, for fractional, multiple and full wave type antennas in collinear arrangement.