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:
Apr. 21, 2009
Filed:
Jun. 21, 2004
Hiroaki Nagano, Kanagawa, JP;
Akira Suhara, Kanagawa, JP;
Kazuhiro Yamada, Aichi, JP;
Shigeya Aoyama, Aichi, JP;
Hiroaki Nagano, Kanagawa, JP;
Akira Suhara, Kanagawa, JP;
Kazuhiro Yamada, Aichi, JP;
Shigeya Aoyama, Aichi, JP;
Sony Corporation, , JP;
NGK Spark Plug Co., Ltd., , JP;
Abstract
A wireless signal switching circuit for switching a plurality of wireless transmitter signals or a plurality of wireless receiver signals with low loss in a dual mode compatible mobile phone (cellular phone) or other mobile wireless communication apparatus having for example a triple band GSM system as a first communication system and for example a UMTS system as a second communication system is provided. A wireless signal switching circuithas a signal route switchof a For Ftransmission and reception system, a signal route switching circuitof an For UMTS transmission and reception system having a diplexer, and a 90 degree phase rotation circuit. The relationship of frequencies is F≦F<F. The 90 degree phase rotation circuithas the characteristic that the phase of a signal of For Fis rotated by 90 degrees when a switch elementis set to a closed state, and a high frequency of UMTS is attenuated when the switch elementis set to an opening state.