US PATENT SUBCLASS 343 / 846
.~ With grounding structure (including counterpoises)

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

700 R  DF  ANTENNAS {58}
846.~ With grounding structure (including counterpoises) {3}
847  DF  .~.~> Insulated from or capacity coupled to ground
848  DF  .~.~> Artificial or substitute grounds (e.g., ground planes)
849  DF  .~.~> Modified natural grounds

DEFINITION

Classification: 343/846

(under subclass 700) Subject matter wherein the active antenna is combined with structure including ground or structure most closely associated with or simulating ground, and such structure being connected to the terminal of the signal receiver or source opposing the active antenna terminal (i.e., having the signal receiver or source interposed between the active antenna and this structure), for establishing a reference potential level for operating the active antenna.

(1) Note. For classification herein significant details of the ground structure must be claimed. The mere recitation of a ground or ground terminal or of a switch to connect to ground is not sufficient to bring such subject matter within this subclass.

(2) Note. The ground structures may radiate signal energy by reflection, as for example, where such a structure functions as an image antenna. But as distinct from reflectors in subclasses 834+ and 912+ the ground structure bears a significant potential relationship with the antenna, while a reflector has no such significant potential relationship.

(3) Note. This grounding structure is usually used with unbalanced or capacity antennas, as opposed to balanced antennas.

SEE OR SEARCH THIS CLASS, SUBCLASS:

705+, 709+ and 711+, for antennas with aircraft, watercraft and vehicles, respectively, wherein these latter structures may constitute a ground or counterpoise. 719, for underground or underwater antennas.

829+, for fractional, multiple or full wave linear antennas with grounding structure, including counterpoises.

834+, and 912+, for antennas with reflectors and reflectors, per se. See also (2) Note, above.

841+, for antennas with an electrical shield.

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

SEE OR SEARCH CLASS

174, Electricity: Conductors and Insulators,

6+, for earth grounds for conductors.