2008•Unpublished venueRequires access

Three-way Doherty power amplifier with uneven power drive

Suo Hai-lei, Jingfu Bao

Abstract

The basic operation principle of the three-way Doherty power amplifier is described. For the experimental verification, a 2.14 GHz three-way Doherty power amplifier using LDMOS devices with a power ratio of 1:2:2 is implemented and tested using WCDMA signal. In the design, we assign more input power to the peaking2 and peaking1 power amplifiers, so the three-way Doherty power amplifier has an uneven power drive. The test data prove that, the three-way Doherty power amplifier with uneven power drive has higher efficiency than the classical two-way Doherty power amplifier when the input signal has a high peak-to-average power ratio.

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Available abstract

Key concepts: Amplifier, Doherty amplifier, Linear amplifier, Power bandwidth, Electrical engineering, LDMOS, Direct-coupled amplifier, RF power amplifier