A high efficiency commercial GaAs MESFET power amplifier for PCM/CIA applications at 2.45 GHz

2005 ◽  
Author(s):  
T. Quach ◽  
J. Staudinger
Keyword(s):  
Power Amplifier ◽  
High Efficiency ◽  
Gaas Mesfet

Improvement of Carrier Power to Third-Order Intermodulation Distortion Power Ratio for a Power Amplifier at 5.25 GHz using LINC Method

2018 ◽  
Vol 12 (1) ◽  
pp. 34-40
Author(s):  
Said Elkhaldi ◽  
Naima Amar Touhami ◽  
Mohamed Aghoutane ◽  
Taj-eddin Elhamadi
Keyword(s):  
Power Amplifier ◽  
Artificial Neural Network Model ◽  
Power Ratio ◽  
Linear Amplification ◽  
Third Order ◽  
Gaas Mesfet ◽  
Constant Envelope ◽  
Modulation Signal ◽  
Low Efficiency ◽  
Nonlinear Components

Introduction:This paper focuses on improving the power amplifier linearity for wireless communications. The use of a single branch of a power amplifier can produce high distortion with low efficiency.Method:In this paper, the Linear Amplification with Nonlinear Components (LINC) technique is used to improve the linearity and efficiency of the power amplifier. The LINC technique is based on converting the envelope modulation signal into two constant envelope phase-modulated baseband signals. After amplification and combining the resulting signals, the required linear output signal is obtained. To validate the proposed approach, LINC technique is used for linearizing an amplifier based on a GaAs MESFET (described by an artificial neural network Model).Conclusion:Good results have been achieved, and an improvement of about 40.80 dBc and 47.50 dBc respectively is obtained for the Δlower C/I and Δupper C/I at 5.25 GHz.

Co-Designed High-Efficiency GaN Filter Power Amplifier

2020 ◽  
Author(s):  
Jose Antonio Estrada ◽  
Pedro de Paco ◽  
Seth Johannes ◽  
Dimitra Psychogiou ◽  
Zoya Popovic
Keyword(s):  
Power Amplifier ◽  
High Efficiency
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