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. 28, 2009
Filed:
May. 18, 2007
Pinghua He, Guangdong, CN;
Wenxin Yuan, Guangdong, CN;
Pinghua He, Guangdong, CN;
Wenxin Yuan, Guangdong, CN;
Huawei Technologies Co., Ltd., Shenzhen, Guangdong, CN;
Abstract
Systems and methods for hot standby of radio frequency (RF) power amplifier are disclosed, an auxiliary RF power amplifier is added and SPDT microwave switches are adopted at the input and output sides of primary RF power amplifiers to control whether to make the auxiliary RF power amplifier function. When a primary RF power amplifier fails, the auxiliary power amplifier can immediately take over the functions of the failed primary RF power amplifier without cutting off the power or stopping the operation of the whole system. SPDT microwave switches with multiple transmission lines and switch devices connected based on certain topologies are disclosed. The SPDT microwave switches have the functions of signal switching and power dividing and combining, simple circuit topology, excellent impedance matching characteristics or no reflected signals at ports, therefore the switches are highly practical and can be adopted in RF power amplifier hot standby systems.