The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 08, 2013
Filed:
Jul. 11, 2011
Applicant:
Ronald Edgar Ham, Austin, TX (US);
Inventor:
Ronald Edgar Ham, Austin, TX (US);
Assignee:
Other;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01Q 1/38 (2006.01); G01R 29/10 (2006.01);
U.S. Cl.
CPC ...
Abstract
In an automatic tuning system for a loop antenna having a single electronically variable reactance element, the reactive component sense of the antenna impedance is determined over a wide range of frequency. The electronically variable reactance component of the antenna is automatically minimized by a feedback loop driving a voltage variable capacitance until the reactive component of the antenna impedance is virtually zero and the antenna impedance is hence resistive. The adjustment of the electronically variable capacitance is by a variable high voltage power supply controlled by a feedback amplifier or by a high voltage feedback amplifier.