US 12,348,255 B2
Adaptive antenna tuning system
Liang Han, Sunnyvale, CA (US); Enrique Ayala Vazquez, Watsonville, CA (US); Thomas E. Biedka, San Jose, CA (US); Hongfei Hu, Cupertino, CA (US); Erdinc Irci, Sunnyvale, CA (US); Nanbo Jin, San Jose, CA (US); James G. Judkins, Campbell, CA (US); Victor C. Lee, Santa Clara, CA (US); Matthew A. Mow, Los Altos, CA (US); Mattia Pascolini, San Francisco, CA (US); Ming-Ju Tsai, Sunnyvale, CA (US); Yiren Wang, Cupertino, CA (US); Yuancheng Xu, San Jose, CA (US); and Yijun Zhou, Mountain View, CA (US)
Assigned to Apple Inc., Cupertino, CA (US)
Filed by Apple Inc., Cupertino, CA (US)
Filed on Jan. 23, 2023, as Appl. No. 18/158,441.
Application 18/158,441 is a continuation of application No. 16/898,069, filed on Jun. 10, 2020, granted, now 11,569,858.
Claims priority of provisional application 62/960,500, filed on Jan. 13, 2020.
Prior Publication US 2023/0170927 A1, Jun. 1, 2023
Int. Cl. H04B 1/38 (2015.01); H01Q 23/00 (2006.01)
CPC H04B 1/38 (2013.01) [H01Q 23/00 (2013.01)] 20 Claims
OG exemplary drawing
 
1. Transceiver circuitry comprising:
an antenna directly coupled to a first printed circuit board (PCB) and configured to transmit radio frequency signals based on analog electrical signals;
radio frequency front end circuitry disposed on a second PCB and configured to output the analog electrical signals;
a transmission line configured to electrically couple the antenna and the radio frequency front end circuitry; and
tuner circuitry disposed on the first PCB and configured to set a tuning state of the antenna based on an antenna impedance, wherein the tuning state is associated with a device condition, wherein the device condition comprises an indoor condition or an outdoor condition, the tuner circuitry comprising;
measurement circuitry electrically coupled to the antenna via coupler circuitry, the measurement circuitry configured to measure one or more waveform properties of a forward traveling signal to the antenna and a reflected signal corresponding to the forward traveling signal from the antenna, the coupler circuitry comprising a coupler disposed on the first PCB, and
impedance determining circuitry configured to determine the antenna impedance based on the one or more waveform properties.