Abstract
A class-B power amplifier with high output power and high power added efficiency (PAE) is designed in this paper. Based on the ADS tools of load-pull and source-pull, the optimal load impedance and source impedance can be obtained, respectively. Then, the matching circuit have been achieved by combining the impedance matching technique. Simulation results show that the class-B power amplifier has the PAE of 69.386% and output power of 45.32dBm with the working frequency of 960MHz. Therefore, It is a high-efficiency class-B power amplifier.
Highlights
All the major wireless standards-GSM, DMA,WCDMA, 802.11 a/b/g/n, WiBro and WiMax- are being integrated into a single package and widely adopted in the wireless communication system
power amplifier (PA) is the core component of the wireless transmitter, its main function is to increase the radio frequency (RF) power enough, which is effectively transmitted to a receiver through air medium
As the key equipment for the modern wireless communication, PAs have been widely applied in satellite communication, radar, wireless communications, navigation, electronic counter measures etc [1]
Summary
All the major wireless standards-GSM, DMA,WCDMA, 802.11 a/b/g/n, WiBro and WiMax- are being integrated into a single package and widely adopted in the wireless communication system. As a result, achieving simultaneously high efficiency and high linearity remains one of the major challenges in microwave PAs. To our knowledge, PA is the core component of the wireless transmitter, its main function is to increase the RF power enough, which is effectively transmitted to a receiver through air medium. In order to obtain the largest output power within a certain frequency range, the power transistor often works near the saturated state. At this point, its S parameters often change with the variation of the input signal, and the power gain will become smaller.
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