the parasitic elements having dual-band or multi-band characteristics

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) > Arrangements for providing operation on different wavebands > Combination of fed elements with parasitic elements > the parasitic elements having dual-band or multi-band characteristics