US 11,749,893 B2
Apparatus for antenna impedance-matching and associated methods
Thomas E. Voor, Cedar Park, TX (US); Attila Zolomy, Budapest (HU); and Pasi Rahikkala, Vihti (FI)
Assigned to Silicon Laboratories Inc., Austin, TX (US)
Filed by Silicon Laboratories Inc., Austin, TX (US)
Filed on May 22, 2019, as Appl. No. 16/420,111.
Application 16/420,111 is a continuation in part of application No. 16/237,583, filed on Dec. 31, 2018.
Application 16/237,583 is a continuation in part of application No. 15/250,719, filed on Aug. 29, 2016, granted, now 10,374,300.
Application 15/250,719 is a continuation in part of application No. 16/237,511, filed on Dec. 31, 2018, abandoned.
Prior Publication US 2019/0280384 A1, Sep. 12, 2019
Int. Cl. H01Q 7/00 (2006.01); H03H 7/38 (2006.01); H01Q 1/22 (2006.01)
CPC H01Q 7/005 (2013.01) [H01Q 1/2291 (2013.01); H03H 7/38 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An apparatus, comprising:
a module, comprising an impedance matching circuit;
a first capacitor external to the module and coupled to the impedance matching circuit; and
a loop antenna to transmit or receive the RF signals, wherein the loop antenna is coupled to the first capacitor,
wherein the first capacitor is coupled in series between the loop antenna and the impedance matching network.