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:
Jun. 29, 2011
Applicants:
Robert Ian Henderson, Chelmsford, GB;
James Christopher Gordon Matthews, Chelmsford, GB;
Inventors:
Robert Ian Henderson, Chelmsford, GB;
James Christopher Gordon Matthews, Chelmsford, GB;
Assignee:
BAE SYSTEMS plc, London, GB;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01Q 1/36 (2006.01); H01Q 1/27 (2006.01); H01Q 1/38 (2006.01); H01Q 9/27 (2006.01);
U.S. Cl.
CPC ...
H01Q 1/273 (2013.01); H01Q 1/36 (2013.01); H01Q 1/38 (2013.01); H01Q 9/27 (2013.01);
Abstract
A wearable antenna assembly incorporates a coplanar waveguide feed in one of the arms of a two-arm spiral antenna. The antenna has relatively high impedance compared with the feed line from a suitable radio but the coplanar waveguide feed is simply modified to provide a quarter-wave transformer adjacent to the feed connection to the antenna and at least one further impedance transformation step on a tangential extension of the feed at the outer edge of the spiral antenna.