CPC H01Q 5/307 (2015.01) [H01Q 5/28 (2015.01); H01Q 5/50 (2015.01); H01Q 15/006 (2013.01); H03H 7/42 (2013.01); H03D 2200/0023 (2013.01); H03H 9/0004 (2013.01); H03H 2007/386 (2013.01)] | 20 Claims |
1. An apparatus, comprising:
a radio-frequency (RF) apparatus; and
a multi-band matching balun using passive components, the multi-band matching balun coupled to the RF apparatus, the multi-band matching balun including at least one three-element frequency-dependent resonator (TEFDR) and at most three reactive elements,
wherein the at least one TEFDR provides functionality of an inductor having a frequency-dependent inductance or a capacitor having a capacitance having a frequency-dependent capacitance.
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