US 9,812,780 B2
Techniques of tuning an antenna by weak coupling of a variable impedance component
Roberto Gaddi, 's-Hertogenbosch (NL); Paul Anthony Tornatta, Jr., Melbourne, FL (US); and Ramadan A. Alhalabi, San Jose, CA (US)
Assigned to CAVENDISH KINETICS, INC., San Jose, CA (US)
Appl. No. 14/916,015
Filed by CAVENDISH KINETICS, INC., San Jose, CA (US)
PCT Filed Sep. 17, 2014, PCT No. PCT/US2014/055987
§ 371(c)(1), (2) Date Mar. 2, 2016,
PCT Pub. No. WO2015/042092, PCT Pub. Date Mar. 26, 2015.
Claims priority of provisional application 61/881,292, filed on Sep. 23, 2013.
Claims priority of provisional application 61/910,484, filed on Dec. 2, 2013.
Prior Publication US 2016/0218431 A1, Jul. 28, 2016
Int. Cl. H01Q 1/24 (2006.01); H01Q 5/378 (2015.01); H01Q 9/42 (2006.01); H01Q 5/328 (2015.01)
CPC H01Q 5/378 (2015.01) [H01Q 1/241 (2013.01); H01Q 1/243 (2013.01); H01Q 5/328 (2015.01); H01Q 9/42 (2013.01)] 30 Claims
OG exemplary drawing
 
1. An antenna structure, comprising:
a linear antenna conductor coupled to a printed circuit board, wherein the antenna conductor hangs off the edge of the printed circuit board;
a parasitic element coupled to the printed circuit board through a grounded leg, wherein the parasitic element is spaced from and parallel to the antenna conductor; and
a digital variable capacitor coupled between the parasitic element and the printed circuit board, wherein the digital variable capacitor is spaced from the grounded leg.