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:
Aug. 11, 2015
Filed:
Mar. 14, 2014
Applicant:
Hemisphere Gnss Inc., Scottsdale, AZ (US);
Inventors:
Walter J. Feller, Airdrie, CA;
Xiaoping Wen, Calgary, CA;
Assignee:
HEMISPHERE GNSS INC., Scottsdale, AZ (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01Q 9/04 (2006.01);
U.S. Cl.
CPC ...
H01Q 9/0414 (2013.01); H01Q 9/0435 (2013.01);
Abstract
GNSS signals are centered around two bands, L1 and L2, and antennas must cover both these bands for good RTK performance. GPS is at a lower frequency in both bands than the Russian GLONASS system. What is described herein is a method of constructing a low profile dual frequency wideband antenna with excellent polarization and signal reception for both GPS and GLONASS. This technique minimizes the impact of tolerances of the dielectrics, thicknesses and tuning by optimal construction.