US 11,894,621 B2
Radio-frequency apparatus with multi-band balun with improved performance and associated methods
Zoltan Vida, Budapest (HU); and Attila L. Zolomy, Budapest (HU)
Assigned to Silicon Laboratories Inc., Austin, TX (US)
Filed by Silicon Laboratories Inc., Austin, TX (US)
Filed on Dec. 18, 2017, as Appl. No. 15/845,369.
Prior Publication US 2019/0190149 A1, Jun. 20, 2019
This patent is subject to a terminal disclaimer.
Int. Cl. H03H 7/42 (2006.01); H01P 5/10 (2006.01); H01Q 5/307 (2015.01); H01Q 15/00 (2006.01); H01Q 5/50 (2015.01); H01Q 5/28 (2015.01); H03H 9/00 (2006.01); H03H 7/38 (2006.01)
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
OG exemplary drawing
 
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.