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Design of a Novel Wideband High Efficiency CCF PA

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Abstract

In this article, a novel approach for the design of broadband high-efficiency power amplifiers (BHPAs) is presented. The method is to simplify the process of synthesizing a wideband output matching network by realizing harmonic tuning and fundamental matching separately. First, the second and third harmonic load impedances are calculated based on the theory of Continuous Class-F Mode. Then, a novel wideband harmonic-suppressing network is obtained by using microstrip radial stubs which is not affected by the adjacent fundamental matching circuit. The proposed PA using a 10-W Cree GaN HEMT device achieves a measured result of a fractional bandwidth of 30.4% from 1.95 to 2.65 GHz, with 60.9–81.6% drain efficiency, 60–79.9% PAE and 39.7–41.7 dBm output power throughout the operating band. As shown in the design process, simulated analyses and measured results, the proposed idea makes the design of the harmonic load network much easier and more accurate. It is generally more feasible, compared with some of the existing methods which are difficult to realize the fundamental and harmonic wave controlling at the same time, especially at higher frequencies. And this method can be widely applied in the BHPA design and modern wireless communication systems.

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Acknowledgements

This work is supported by the National Natural Science Foundation of China (Grant Nos. 61301022 and U1430102).

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Authors and Affiliations

  1. School of Electronic Engineering, University of Electronic Science and Technology of China, No. 2006, Xiyuan Road, Hightech Area (West), Chengdu, 611731, People’s Republic of China

    Xin Cao & Zongxi Tang

  2. Institute of Astronautics and Aeronautics, University of Electronic Science and Technology of China, No. 2006, Xiyuan Road, Hightech Area (West), Chengdu, 611731, People’s Republic of China

    Fei Wang

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  1. Xin Cao
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  2. Zongxi Tang
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  3. Fei Wang
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Correspondence to Xin Cao.

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Cao, X., Tang, Z. & Wang, F. Design of a Novel Wideband High Efficiency CCF PA. Wireless Pers Commun 96, 371–382 (2017). https://doi.org/10.1007/s11277-017-4172-9

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  • DOI: https://doi.org/10.1007/s11277-017-4172-9

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