US PATENT SUBCLASS 333 / 109
.~.~ Using directional coupler

Current as of: June, 1999
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333 /   HD   WAVE TRANSMISSION LINES AND NETWORKS

1  DF  PLURAL CHANNEL SYSTEMS {4}
100  DF  .~ Having branched circuits {6}
109.~.~ Using directional coupler {6}
110  DF  .~.~.~> For providing frequency separation
111  DF  .~.~.~> For providing adjustable coupling
112  DF  .~.~.~> Having lumped parameters or impedances
113  DF  .~.~.~> Having parallel-guide waveguide
114  DF  .~.~.~> Having crossed-guide waveguide
115  DF  .~.~.~> Having TEM lines {1}

DEFINITION

Classification: 333/109

Using directional coupler:

(under subclass 100) Wave transmission systems including two transmission lines having an intervening coupling which propagates a portion of the energy passing in one direction along the first line in the second line in only one direction from the coupling, and which propagates a portion of the energy which may pass in the other direction along the first line in the second line in the opposite direction only from the coupling.

(1) Note. The second line may include a means, such as a dissipative termination, so that the energy from one direction only will be propagated to a distance in the second line. For example,

[figure] [figure]

SEE OR SEARCH THIS CLASS, SUBCLASS:

117, for a plurality of lines connected to a line by means of a hybrid coil.