for operation of centre-fed antennas comprising one or more collinear, substantially straight or elongated active elements

Full Title

Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements (combinations of separate active antenna units operating in different wavebands and connected to a common feeder system H01Q21/30) > Resonant antennas > for operation of centre-fed antennas comprising one or more collinear, substantially straight or elongated active elements