Performance sensitivities of a microstrip amplifier using Adjoint Network method

S. Demirel, F. Güneş
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Abstract

This work focuses on the performance sensitivities of a wide-band microstrip amplifier along its operation bandwidth using “Adjoint Network and Adjoint Variable” method, via “Wave” approaches, which include sensitivities of the transducer power gain, noise figure, magnitude and phase of the input reflection coefficient. Thus, this work can be considered as an extension of the work in [2] to the performance sensitivities with respect directly to the microstrip width and length. These analytical expressions of the performance sensitivities can be used for the gradient-based efficient optimization, in tolerance and yield analysis of the microstrip amplifiers. Performance sensitivities of the Π-type microstrip amplifier are considered as a worked example. Results of the Π-type amplifier designed for the maximum gain GTmax constrained by the minimum noise figure at each operation frequency Fmin(f) and input VSWR (Vireq= 1.85) within the frequency range 8-18 GHz are given as compared with the results of the perturbational and Chain Parameter methods. Finally sensitivities of all the microstrip lines of the amplifier are arranged according to the increasing values of the sensitivity measures to be considered in the realization stage.
用伴随网络法分析微带放大器的性能灵敏度
本研究的重点是利用“伴随网络和伴随变量”方法,通过“波”方法,研究宽带微带放大器沿其工作带宽的性能灵敏度,包括换能器功率增益、噪声系数、输入反射系数的幅度和相位的灵敏度。因此,这项工作可以被认为是[2]中工作的延伸,直接涉及微带宽度和长度的性能灵敏度。这些性能灵敏度的解析表达式可用于基于梯度的微带放大器容差和良率分析的高效优化。以Π-type微带放大器的性能灵敏度为例。在8 ~ 18 GHz频率范围内,以最小噪声系数Fmin(f)约束下的最大增益GTmax和输入驻波比(Vireq= 1.85)为目标设计了Π-type放大器,并与微扰法和链参数法的结果进行了比较。最后,根据实现阶段要考虑的灵敏度措施的增加值,对放大器各微带线的灵敏度进行了排序。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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