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:
Feb. 16, 2010
Filed:
Jun. 19, 2006
Louis David Thomas, Hampshire, GB;
Philip Edward Haskell, Hampshire, GB;
Louis David Thomas, Hampshire, GB;
Philip Edward Haskell, Hampshire, GB;
Quintel Technology Limited, Bristol, GB;
Abstract
An antenna system for sharing of operation employs contiguous transmit frequencies. Transmit frequencies are separated into non-contiguous sub-groups isolated from one another by filters(+) and(−) associated with positive and negative polarization. Received frequencies are filtered and split into five signals for input to base station receive ports. Non-contiguous transmit frequency sub-groups are combined by a quadrature hybridand pass with 90 degree relative phase shift to mutually orthogonal antenna stack ports P(+) and P(−) associated with orthogonally polarized sets of antenna elements AS(+) and AS(−): the ports P(+) and P(−) are isolated from one another by the hybrid. The 90 degree phase shift results in one transmit subgroup being radiated with left hand circular polarization and the other transmit subgroup being radiated with right hand circular polarization. Changing the relative phase shift changes the radiated polarization to linear or elliptical, and signal amplitude weighting provides control of antenna beam polarization direction.