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. 22, 2016
Filed:
Nov. 22, 2013
Llc “topcon Positioning Systems”, Moscow, RU;
Anton Pavlovich Stepanenko, Dedovsk, RU;
Dmitry Vitalievich Tatarnikov, Moscow, RU;
Andrey Vitalievich Astakhov, Moscow, RU;
Anton Pavlovich Stepanenko, Dedovsk, RU;
Dmitry Vitalievich Tatarnikov, Moscow, RU;
Andrey Vitalievich Astakhov, Moscow, RU;
Topcon Positioning Systems, Inc., Livermore, CA (US);
Abstract
An antenna is configured to operate with circularly-polarized electromagnetic radiation in a low-frequency band and in a high-frequency band. The antenna comprises a ground plane and a radiator. The radiator comprises four pairs of radiating elements disposed as pairs of spiral segments on a cylindrical surface having a longitudinal axis orthogonal to the ground plane. Each pair of radiating elements comprises a low-frequency radiating element and a high-frequency radiating element. The low-frequency radiating element comprises a low-frequency conductive strip. The high-frequency radiating element comprises an electrically-connected series of at least one high-frequency conductive strip and at least one high-frequency capacitor. The electrical path lengths of the low-frequency radiating elements and the electrical path lengths of the high-frequency radiating elements are equal.