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:
Jan. 30, 2007
Filed:
May. 31, 2005
John M. Seavey, Cohasset, MA (US);
John M. Seavey, Cohasset, MA (US);
Antenna Research Associates, Inc., Pembroke, MA (US);
Abstract
Broadband omnidirectional, vertically polarized communications antenna systems are disclosed. The antenna systems comprises a plurality of center-fed stacked dipole radiating elements disposed along a central axis, a coaxial feed line coupled between each of the stacked radiating elements. In certain embodiments, a two-wire balun is coupled to a feed point of each radiating element and a shunt inductor and capacitor are coupled to each radiating element. Other embodiments do not require the use of the balun. Certain embodiments use a printed-circuit dipole having a flat shape. Other embodiments use a metal dipole having a cylindrical shape. The array antenna systems may be stacked vertically in separate bays each with its independent RF port.