Design of a multi-octave power amplifier using broadband load-pull X-parameters
Design of a multi-octave power amplifier using broadband load-pull X-parameters
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使用宽带负载牵引 X 参数的多倍频程功率放大器的设计
DOI：
10.1002/jnm.2878
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发表时间：
2021
期刊：
影响因子：
--
通讯作者：
Cao Wenhui
中科院分区：
文献类型：
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作者：
Wu Meilin;Cai Jialin;King Justin;Chen Shichang;Su Jiangtao;Cao Wenhui
本文首次提出了一种基于宽带负载牵引X参数模型的多倍频程功率放大器的设计方法。采用10 W GaN封装晶体管进行模型X参数模型提取。一旦模型被提取，它与器件制造商提供的等效电路模型进行比较，发现X参数模型的精度与原始电路模型的精度相当。特别是，X参数模型可以准确地确定负载史密斯圆图的面积，从而实现最佳输出功率和漏极效率，这是实现最大器件性能的基本考虑因素。输入和输出匹配网络设计均采用切比雪夫低通架构。最后，设计了一个多倍频程带宽PA，从0.6到2.3 GHz。将宽带X参数模型的仿真结果与实现的PA的测量结果进行了比较，具有明显的高保真度匹配，从而证明了具有宽带X参数的多倍频程PA设计过程的有效性。实现的PA在整个工作频带的输出功率保持在39.51和42.41 dBm之间，而漏极效率保持在60%以上，在2 GHz附近高达73%。PA的增益在整个频带上大于11 dB。
The design of a multi‐octave power amplifier (PA) based on a broadband load‐pullX‐parameter model is described for the first time in this work. A 10‐W GaN package transistor is employed for modelX‐parameter model extraction. Once the model is extracted, it is compared with the equivalent circuit model provided from the device manufacturer, and it is found that theX‐parameter model accuracy is comparable to that of the original circuit model. In particular, theX‐parameter model can accurately determine the areas of the load Smith chart leading to optimal output power and drain efficiency, essential considerations for extracting maximum device performance. A Chebyshev low‐pass architecture is utilized for both the input and the output matching network designs. Finally, a multi‐octave bandwidth PA, from 0.6 to 2.3 GHz, is designed. Simulation results of the broadbandX‐parameter model and the measured results of the realized PA are compared, with a high fidelity match evident, thus demonstrating the efficacy of the design procedure of multi‐octave PA with broadbandX‐parameters. The output power of the realized PA across the operating frequency band remains between 39.51 and 42.41 dBm, while the drain efficiency remains above 60%, reaching as high as 73% around 2 GHz. The gain of the PA is greater than 11 dB over the complete frequency band.