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:
Nov. 17, 1992
Filed:
Dec. 05, 1989
Applicant:
Inventors:
William K Brockelsby, Edmonton, CA;
Conrad M Walker, Edmonton, CA;
Michael L Hryciuk, Edmonton, CA;
Donald P Gillis, Edmonton, CA;
Assignee:
EID Electronic Identification Systems Ltd., Montreal, CA;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01S / ; G01S / ;
U.S. Cl.
CPC ...
342 44 ; 342 45 ; 342 50 ; 342 51 ; 340505 ; 34082554 ; 340933 ; 340935 ; 340988 ; 235384 ;
Abstract
An antenna system for mounting in a roadway comprised of an electrically lossy material. The antenna system has a reflector trough shield filled with a solid dielectric. An antenna, preferably comprised of coaxial cable, is positioned in the reflector trough, which prevents electromagnetic waves radiated by the antenna from being lost into the roadway.