(under subclass 24) Coupling networks which include one or
more impedance elements constructed or proportioned to substantially eliminate the reflected wave energy between the network and at least one of the connected circuits caused by impedance differences; impedance matching networks, per se; and systems within the class definition which include such networks.
(1) Note. The particular construction or proportioning producing the impedance match should be claimed for classification in this subclass.
(2) Note. The impedance need only to be matched to pass the energy or frequency band of energy desired.
SEE OR SEARCH THIS CLASS, SUBCLASS:
8+, for branched plural channel systems having impedance matching.
17+, for systems wherein the impedance match is automatically controlled. 22, for line terminations involving impedance matching.
81, for attenuators having means for compensating for changes in terminal impedance caused by adjustment of the attenuator so as to match the impedances of the attenuator to the connected input and/or output circuit.
236+, for long lines wherein reflected wave energy arising from the line structure is compensated.
SEE OR SEARCH CLASS
324, Electricity: Measuring and Testing
600+, especially subclasses 612+ for the miscellaneous measurement and testing of impedance mismatch between circuits, and subclass 140+, for systems and apparatus for the measurement of voltage, current or power ratios which are indicative of impedance mismatch.
343, Communications: Radio Wave,
822, for balanced doublet type antennas with an impedance matching coupling network; and subclasses 860+ for antennas in general with an impedance matching coupling network.
