(under subclass 700) Subject matter wherein an active antenna includes an elongated portion having lumped inductance and capacity in series or shunt with the active portion remote from the lead-in terminals to pass a particular frequency or band of frequencies and to block another frequency or band of frequencies.
(1) Note. In this subclass the lumped inductance and capacity usually act as an impedance in effect terminating the active antenna at its point of connection for a particular frequency, or they may cause the active antenna to resonate at a plurality of different frequencies.
(2) Note. For Classification in this subclass, the inductance and capacity must be lumped. Antennas having distributed inductance and capacity in series or shunt with the active portion remote from the lead-in connection to pass a particular frequency or band of frequencies and to block another frequency or band of frequencies are not classified in this subclass, but in subclasses 802 and 828 below.
SEE OR SEARCH THIS CLASS, SUBCLASS:
723, for single adjustable length electrically long linear antennas.
729+, for plural diverse type antennas using the same active element.
744, for high frequency loop type antennas with series reactance in the loop. 745+, for antennas with variable reactance for tuning the antenna.
749+, for antennas with lumped reactance for loading the antenna.
802, for balanced doublet antennas with distributed reactance added to the arms.
828, for fractional, multiple or full wave length linear type antennas with a non-uniformity in the antenna.
850+, for antennas in general with a coupling network or impedance in the leadin which may include filters in the coupling network.
