using frequency dependent circuits or components, e.g. trap circuits or capacitors

Introduced: January 2015

Full Title

Full titles differ between systems:

IPC:

Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements > Arrangements for providing operation on different wavebands > Individual or coupled radiating elements, each element being fed in an unspecified way > using frequency dependent circuits or components, e.g. trap circuits or capacitors

CPC:

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 > Individual or coupled radiating elements, each element being fed in an unspecified way > using frequency dependent circuits or components, e.g. trap circuits or capacitors

IPC and CPC are identically structured here. All 3 subcodes exist in both systems.

IPC defines codes here since 2015.

Child Classifications

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H01Q 5/321 within a radiating element or between connected radiating elements since 2015 IPC+CPC Available in IPC and CPC
H01Q 5/328 between a radiating element and ground since 2015 IPC+CPC Available in IPC and CPC
H01Q 5/335 at the feed, e.g. for impedance matching since 2015 IPC+CPC Available in IPC and CPC