A 2.4 GHz high efficiency SiGe HBT power amplifier with high-Q LTCC harmonic suppression filter

2003 ◽  
Author(s):  
A. Raghavan ◽  
Deukhyoun Heo ◽  
Moonkyun Maeng ◽  
A. Sutono ◽  
Kyutae Lim ◽  
...  
Keyword(s):  
Power Amplifier ◽  
High Efficiency ◽  
Harmonic Suppression ◽  
Sige Hbt ◽  
High Q

scholarly journals Design of 0.8–2.7 GHz High Power Class-F Harmonic-Tuned Power Amplifier with Parasitic Compensation Circuit

2017 ◽  
Vol 2017 ◽  
pp. 1-8 ◽  
Author(s):  
Zhiqun Cheng ◽  
Xuefei Xuan ◽  
Huajie Ke ◽  
Guohua Liu ◽  
Zhihua Dong ◽  
...  
Keyword(s):  
Power Amplifier ◽  
High Power ◽  
High Efficiency ◽  
Impedance Matching ◽  
Harmonic Suppression ◽  
Compensation Circuit ◽  
Third Harmonic ◽  
The Third ◽  
Saturated Output Power ◽  
Class F

The design, implementation, and measurements of a high efficiency and high power wideband GaN HEMT power amplifier are presented. Package parasitic effect is reduced significantly by a novel compensation circuit design to improve the accuracy of impedance matching. An improved structure is proposed based on the traditional Class-F structure with all even harmonics and the third harmonic effectively controlled, respectively. Also the stepped-impedance matching method is applied to the third harmonic control network, which has a positive effect on the expansion bandwidth. CGH40025F power transistor is utilized to build the power amplifier working at 0.8 to 2.7 GHz, with the measured saturated output power 20–50 W, drain efficiency 52%–76%, and gain level above 10 dB. The second and the third harmonic suppression levels are maintained at −16 to −36 dBc and −16 to −33 dBc, respectively. The simulation and the measurement results of the proposed power amplifier show good consistency.

Study of Harmonic Suppression Method Based on the Class D Amplifier

2013 ◽  
Vol 273 ◽  
pp. 384-388
Author(s):  
Yu Guo ◽  
Wei Li
Keyword(s):  
Power Amplifier ◽  
Integrated Circuit ◽  
High Efficiency ◽  
Harmonic Distortion ◽  
Harmonic Suppression ◽  
Output Terminal ◽  
Class D Amplifier ◽  
Class D ◽  
Small Distortion ◽  
Harmonic Components

Class D power amplifier has the advantages of simple structure, small volume, high efficiency, large output power, and small distortion, therefore is applied widely in the audio power amplifier integrated circuit. But because of existing higher harmonic components, the total harmonic distortion (THD) is high. In this paper, for the characteristics of class D amplifier, a feed-forward control circuit is added to the amplifier output terminal, and a composite filter is used to inhibit output harmonics further. The simulation results show that, the method can reduce the system THD effectively and improve the performance of the amplifier.

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