Adjoint sensitivity analysis of the T, Π, and L types of microstripline low noise amplifiers

Abstract

SUMMARYIn this work, the sensitivities of the Gain G T , noise figure F, magnitudes and phases of the input Γ in and output Γ out reflection coefficients of low noise amplifier are carried out analytically with respect to the matching mirostrips' widths and lengths depending upon the position and the configuration types, using adjoint network method via wave approach for different types of matching networks. Thus, not only these analytical gradient expressions can be implemented with either the gradient-based or non-gradient optimization algorithms even simple metaheuristic algorithm for a high-speed and improved design of the microstrip amplifiers but at the same time the tolerance limitations of the designs can be provided depending on type of the matching network. As a case study, performance sensitivities of the T, Π, L types of microstrip low noise amplifier with the design target parameters of G Tmax , F min and |Γ in | = 0.3 with the operation bandwidth of 10-18 GHz are worked out and compared with results of the numerical perturbation and chain sensitivity matrix methods. Furthermore, performance sensitivity characteristics of the microstrip lines for all types of amplifier circuits are given, and comparisons are made among microstrip lines at the same positions along the operation bandwidths.

WLAN Uygulamaları için Düşük Gürültülü Kuvvetlendirici Tasarımı

“…Küçük sinyal kuvvetlendiricisi tasarlarken seçilen transistör modelinin S-parametresi dosyası üretici firmalardan temin edilebilmektedir (Doddamanş ve Harischandra 2007), (Esame ve Kaynak 2006), (Stece,1999). Bu parametrelerin yanında kararlılık parametreside sistem için önemli bir parametredir (Demirel 2017), (Mahouti 2012).…”

Design Optimization of Low Noise Amplifier for 900mhz GSM Band Applications Using Grey Wolf Algorithm

“…The RF signal is taken via an antenna stage from the space, and then after the received signals are process to be converted from analogue to digital signals for communication. As it can be seen from the figure, the first stage and key element in wireless communication is antenna element, where its performance is essential and the methodologies to improve this performance are being studied by many researchers (Esame, 2006;Çalışkan, 2019;Koçer, 2020;Pozar, 1998), (Demirel, 2017;Mahouti, 2012;Belen, 2021;Kumar, 2019;Roobert, 2020;Khosravi, 2019;Chamg, 2019;Ke, 2018;Belostatski, 2022). However, even with a perfectly designed antenna stage, this is not sufficient to have a high performance communication system.…”

Editorial for the special issue on advances in simulation‐driven modeling and optimization of microwave/RF circuits

“…The special issue is concluded with the two papers demonstrating more conventional design modeling and optimization approaches. Demirel et al consider adjoint‐based sensitivity analysis microstripline low‐noise amplifiers. Then, Mansoor et al demonstrate optimization of integrated photonic components, specifically ring resonator add/drop filters.…”