Síntese de Redes de Casamento em Banda Larga de Baixa Sensibilidade Usando Algoritmo de Seleção Clonal (Synthesis of Low Sensitivity Broadband Matching Networks Using Clonal Selection Algorithm)

Leandro Teixeira Dornelles (dornelles@ime.eb.br)1, Leonardo Bruno de Sá (leonardo.bruno76@gmail.com)2, Antonio Carneiro de Mesquita Filho (antoniomesquitafilho@gmail.com)3


1Instituto Militar de Engenharia
2Centro Tecnológico do Exército
3Universidade Federal do Rio de Janeiro

This paper appears in: Revista IEEE América Latina

Publication Date: July 2016
Volume: 14,   Issue: 7 
ISSN: 1548-0992


Abstract:
This paper presents a new methodology for synthesis of broadband matching networks based on Clonal Selection Algorithms (CSA). This metaheuristic uses the hypermutation as only variation operator resulting in a gradual evolving of the network topology. A closed form expression for the transducer power gain (TPG) sensitivity with respect to the component values is employed, in such a way that the effects of the components tolerance on the matching network performance can easily be quantified. The evolvable function proposed is single-objective and eliminates the difficult task of assigning appropriate weights to parameters. The evaluation of the TPG sensitivity enables the designer to identify and remove irrelevant components of the circuit, simplifying it. The efficiency of the methodology is tested in two cases found in the literature: the traditional project of impedance matching for a simple RLC load proposed by Fano [1]; and a real synthesis of impedance matching network for a monopole whip antenna, proposed in [2]. The results are compared with other existing methods.

Index Terms:
Broadband Impedance Matching, Clonal Selection Algorithm, Low Sensitivity   


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