US PATENT SUBCLASS 343 / 772
.~ Wave guide type (e.g., horn)

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

700 R  DF  ANTENNAS {58}
772.~ Wave guide type (e.g., horn) {8}
773  DF  .~.~> Biconical horn type {2}
776  DF  .~.~> Plural {3}
780  DF  .~.~> "Pillbox" type
781 R  DF  .~.~> With external reflector or director {3}
783  DF  .~.~> With internal-wave refraction means
784  DF  .~.~> With closure
785  DF  .~.~> Dielectric type (e.g., polystyrene rod)
786  DF  .~.~> With horn

DEFINITION

Classification: 343/772

(under subclass 700) Subject matter wherein a wave guide is provided between free space and a generator or receiver of

radio wave energy, or between free space and a nonwave guide coupling or connecting structure which establishes in or collects from the wave guide radio wave energy, the wave guide constraining this energy in its passage to or from free space, and being directly connected with free space without any intervening nonwave guide coupling (such as a probe and dipole).

(1) Note. The guide may be a cavity resonator, or a horn.

(2) Note. The wave guide must guide the wave energy between free space and the nonwave guide coupling, oscillator or receiver for classification in this subclass.

(3) Note. Usually the wave guide has a configuration or structure which substantially matches the impedance to that of free space, such as a horn.

SEE OR SEARCH THIS CLASS, SUBCLASS:

762, for wave guide type antennas with means for moving the antennas for scanning, sweeping or orienting. 767+, for slot type antennas which may involve wave guide structure.

SEE OR SEARCH CLASS

181, Acoustics, for mechanical acoustical devices which collect or emit sound waves to or from an unconfined space containing a sound conducting medium.

219, Electric Heating,

678+, for microwave heating.

333, Wave Transmission Lines and Networks, particularly

1+, 227 and 239, for wave transmission lines and networks involving wave guides and cavity resonators.