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Highly Efficient Power Amplifier for CDMA Base Stations Using Doherty Configuration

Overview This paper extends the classical Doherty amplifier to support CDMA base station power amplifiers that require high efficiency and good linearity. At first, three transistors are estimated, Motorola's MRF21085, MRF5S21090 and MRF5P21180 LDMOS's, to confirm the suitability for Doherty operation. Two 2.14GHz high power Doherty amplifiers are implemented using two MRF5S21090 and a MRF5P21180, respectively, and are optimized at 40W for high efficiency and good linearity using IS95A 8FA CDMA signal. The performances of the Doherty amplifiers are compared with a conventional balanced class AB amplifier using two MRF5S21090.

Further White Paper Details
PublisherInstitute of Electrical and Electronics Engineers File FormatPDF
Date PublishedApril 2004 Downloads3
FormatWhite Papers   
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