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首页> 外文期刊>IEEE transactions on circuits and systems . I , Regular papers >Bandpass Filtering Doherty Power Amplifier With Enhanced Efficiency and Wideband Harmonic Suppression
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Bandpass Filtering Doherty Power Amplifier With Enhanced Efficiency and Wideband Harmonic Suppression

机译：具有高效率和宽带谐波抑制功能的带通滤波Doherty功率放大器

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摘要

There is an ever increasing demand for both function integration and improved performance in wireless communication devices. Therefore, the integration of efficient linearizing amplifying and bandpass filtering functions is proposed for the first time in this paper. A new Doherty amplifier configuration with attractive behaviors including bandpass filtering, wideband harmonic suppression, and enhanced efficiency, is presented. A component crucial to the successful implementation of the proposed configuration is the bandpass quadrature coupler with arbitrary coupling coefficient. Owing to the flexibility of a circular patch in locating the frequencies of different operational modes, it is thus possible to implement good bandpass characteristics. With the introduction of this new component, the Main and Auxiliary amplifiers can be driven more efficiently, resulting in both linearity and efficiency improvements. To verify the validity of the proposed configuration, a Doherty amplifier has been designed and fabricated. Its measured performance is compared with the conventional design and found to exhibit a bandpass filtering characteristics with a wide suppression band up to the third harmonic frequency. Meanwhile, the proposed amplifier achieves a measured power-added-efficiency improvement of 10% and an ACLR improvement better than 5.8 dB at the higher output power region.
机译：对无线通信设备中的功能集成和改进的性能的需求不断增长。因此，本文首次提出了有效的线性化放大和带通滤波功能的集成。介绍了一种新的Doherty放大器配置，该配置具有吸引人的性能，包括带通滤波，宽带谐波抑制和增强的效率。对于成功实现所提出的配置至关重要的组件是具有任意耦合系数的带通正交耦合器。由于圆形贴片在定位不同工作模式的频率方面的灵活性，因此可以实现良好的带通特性。通过引入这个新组件，可以更有效地驱动主放大器和辅助放大器，从而改善线性度和效率。为了验证所提出配置的有效性，已经设计并制造了Doherty放大器。将其测量的性能与常规设计进行比较，发现其具有高达三阶谐波频率的宽抑制带的带通滤波特性。同时，在较高的输出功率区域，拟议的放大器可实现10％的测量功率附加效率改善和优于5.8 dB的ACLR改善。

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