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. 20, 2007
Filed:
Mar. 22, 2002
Norman Richard Nimmo-smith, Worcs, GB;
Louis David Thomas, Worcs, GB;
Geoffrey Raymond Bradbeer, Worcs, GB;
John Allerton Spicer, Worcs, GB;
Stephen Bullers, Worcs, GB;
Norman Richard Nimmo-Smith, Worcs, GB;
Louis David Thomas, Worcs, GB;
Geoffrey Raymond Bradbeer, Worcs, GB;
John Allerton Spicer, Worcs, GB;
Stephen Bullers, Worcs, GB;
Quintel Technology Limited, Farnborough, GB;
Abstract
A transmit network for cellular mobile radio networks incorporates tow transmit multiplexers (ABE) and (CD): the first transmit multiplexerABE receives a group of output signals from three transmitters (A,B andE), and filters them in respective band-pass filters (A,B andE); the second transmit multiplexer (CD) receives a group of output signals from two further transmitters (C andD), and filters them in respective band-pass filters (C andD). The transmit frequencies in each signal group are non-adjacent, which improves isolation between transmitters provided by the filters (). Filtered output signals from respective band-pass filters () are combined at filter outputs (X andY) from which signals are combined in a combiner () providing a degree of isolation between these outputs and enabling the signals to be combined with minimal distortion. Signals from the combiner () are fed via a duplexer to a transmit/receive antenna.