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:
Dec. 15, 2015
Filed:
Oct. 14, 2011
Son Huy Huynh, Redondo Beach, CA (US);
Son Huy Huynh, Redondo Beach, CA (US);
NovAtel Inc., Calgary, CA;
Abstract
In accordance with one or more embodiments of the present invention, a quadrifilar helix antenna can be formed to accommodate multiple frequencies using a single microstrip feed system, illustratively comprising an infinite balun in combination with interspersed antenna conductors tuned for effective resonance at the desired frequencies around the single feed system. Accordingly, as an additional aspect, the present invention also combines the multiple frequency antenna elements and the single feed system into a unitary assembly of cylindrical geometry that is generally reduced in size, with the interspersed arrangement of the multiple (e.g., resonating) antenna conductors wrapped into a short cylindrical surface. Through the use of the single hybrid feed system and resonating antenna conductors for multiple frequencies, the need for complex feed networks having multiple circuits (hybrid circuits, transformers, etc.) is alleviated, while still maintaining acceptable levels of performance.