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:
Mar. 07, 2017
Filed:
Aug. 26, 2014
Applicant:
Topcon Positioning Systems, Inc., Livermore, CA (US);
Inventors:
Andrey Vitalievich Astakhov, Moscow, RU;
Dmitry Vitalievich Tatarnikov, Moscow, RU;
Assignee:
Topcon Positioning Systems, Inc., Livermore, CA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01Q 1/36 (2006.01); H01Q 11/08 (2006.01); G01S 19/22 (2010.01); H01Q 3/44 (2006.01); G01S 19/36 (2010.01);
U.S. Cl.
CPC ...
H01Q 11/08 (2013.01); G01S 19/22 (2013.01); G01S 19/36 (2013.01); H01Q 3/446 (2013.01);
Abstract
An antenna system with a sharp difference in directional pattern is intended for receiving GNSS signals. The antenna system includes at least two antenna elements located above a high-impedance capacitive ground plane, and a combining network. Antenna elements are spaced apart in vertical direction. The combining network provides subtraction of the signal reflected from the ground, the arrangement of antenna elements above the high-impedance capacitive ground plane making such subtraction efficient.