US PATENT SUBCLASS 343 / 731
.~ Traveling wave type

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

700 R  DF  ANTENNAS {58}
731.~ Traveling wave type {6}
732  DF  .~.~> Circular loop
733  DF  .~.~> Rhombic {1}
735  DF  .~.~> Balanced V
736  DF  .~.~> Inverted V
737  DF  .~.~> Plural
738  DF  .~.~> With reflecting transformer

DEFINITION

Classification: 343/731

(under subclass 700) Subject matter wherein an elongated conducting mass of appreciable electrical length with respect to the wave length of the signal energy (usually greater than a half-wave length) is coupled to free space continuously along its length to transmit signal energy between the mass and free space along its length; the mass being inherently adapted to, or being arranged to, or including structure to give the mass a delay or acceleration characteristic in the direction of propagation of the radio wave in space to which the mass is coupled so that the wave of electric energy conducted along the mass remains in phase with the associated radio wave moving in space.

(1) Note. In receiving, the interaction between the wave propagated along the elongated conductive mass and the wave in space coupled to the mass results in a traveling wave progressively increasing in magnitude along the length of the path of the propagated wave, due to the reinforcing of the in-phase space wave collected along the antenna as the collected wave travels towards the receiving means. The mere conduction of wave energy along its length as in a wave guide type antenna of subclass 772 is not sufficient for classification here. The wave energy must progress in phase with the space wave to secure the reinforcing of the wave energy.

SEE OR SEARCH THIS CLASS, SUBCLASS:

739, for antennas having resistance electrically remote from the coupling to a source or load for such purposes as the prevention of reflected waves.

811, for fishbone type arrays of center-fed balanced doublet type antennas.

845, for antennas with a ground connection spaced from the feed line connection.