.~ With coupling network or impedance in the leadin {9}
851
.~.~ With radiation suppressor (e.g., shield)
DEFINITION
Classification: 343/851
(under subclass 850) Subject matter wherein the coupling network, or the leadin associated with the coupling network includes structure or is arranged for minimizing undesired radiation effects to or from the coupling network or the leadin.
(1) Note. Where the corrective, radiation suppression means includes significant elements of a transmitter or receiver, or involves circuit connections to such elements other than the antenna and coupling and/or the transmission line thereto, classification is in Class 455, subclasses 114, 271 and 283+ for the transmitter and receiver respectively.
(2) Note. Where shielding is directly associated with the active antenna to modify its radiation or reception classification is not here, but in subclass 841. Where the shielding or other radiation suppressing means is associated with a transmission line or electrical connector, classification is in subclasses 905 and 906, respectively.
(3) Note. A mere filter in the coupling network which discriminates against the passage of electrical energy through the coupling network, although such energy causes or may be caused by undesired radiation, is not classified in this subclass, but in subclass 850 and other indented subclasses.
SEE OR SEARCH THIS CLASS, SUBCLASS:
782, for wave guide type antennas with means reducing reradiaton into the active antenna. 789, for antennas located within conductive apertured housings or walls.
790+, for antennas wherein an active sleeve surrounds the feed line.
829+, for antennas of significant electrical length with decoupling shields.
841, for antennas with shields for such antennas. See (2) Note, above.
905, for antennas combined with transmission lines which may involve the suppression of radiation interference to or from such lines. See (2) Note, above.
906, for antennas combined with electrical connectors which may involve the suppression of radiation interference to or from such electrical connectors. See (2) Note, above.
SEE OR SEARCH CLASS
174, Electricity: Conductors and Insulators,
32+, and 50+ for anti-inductive structures including shielding means.
307, Electrical Transmission or Interconnection Systems,
89+, for miscellaneous electrical systems having
anti-induction means or means to prevent undesired coupling to other systems. 315, Electric Lamp and Discharge Devices: Systems,
85, for electric lamp and discharge device systems with electromagnetic wave radiation preventing or shielding means.
333, Wave Transmission Lines and Networks,
12, for wave transmission systems having transmission line inductive or radiation interference reduction means.
336, Inductor Devices,
84+, for inductor devices with electric and/or magnetic shielding means.
455, Telecommunications,
271, for coupling of an antenna to a detector, mixer, or amplifier in a radio receiver for minimizing radiation effects.
