(under subclass 850) Subject matter wherein the passive coupling network includes one or more impedance elements constructed or proportioned to substantially eliminate the reflected wave energy between the antenna and the receiver or signal energy source, caused by impedance differences.
(1) Note. Only networks matching a single antenna to a single frequency, source or load are classified in this subclass. Subject matter involving plural antennas matched to a single source or load is classified in subclasses 853+ above, and subject matter involving a single antenna matched to a plural source or load is classified in subclass 858 above.
SEE OR SEARCH THIS CLASS, SUBCLASS:
745+, for antennas with variable reactance for tuning such antennas which may involve impedance matching.
822, for balanced doublets with an impedance matching coupling network.
852, for plural path antennas with coupling circuits with impedance matching.
SEE OR SEARCH CLASS 333, Wave Transmission Lines and Networks,
32+, and 124+ for wave transmission lines and networks involving impedance matching or impedance matching networks, per se.
