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:
May. 05, 2015
Filed:
Apr. 13, 2013
Applicant:
Larry G. Stolarczyk, Raton, NM (US);
Inventor:
Larry G. Stolarczyk, Raton, NM (US);
Assignee:
Stolar, Inc., Raton, NM (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
G01S 13/56 (2006.01); G01V 3/12 (2006.01); G01S 13/88 (2006.01);
U.S. Cl.
CPC ...
G01S 13/56 (2013.01); G01S 13/885 (2013.01); G01V 3/12 (2013.01);
Abstract
An automatic frequency control is used to keep a continuous wave (CW) transmission tuned to the resonant frequency of a resonant microwave patch antenna (RMPA). Changes in loading and the bulk dielectric constant of the mixed media in front of the RMPA will affect its resonant frequency and input impedance. A significant shift in the measured input impedance is interpreted as an object moving nearby, and the phase angle of the measured input impedance is used to estimate the direction of an object's movement.