[This article belongs to Volume - 54, Issue - 02]
Gongcheng Kexue Yu Jishu/Advanced Engineering Science
Journal ID : AES-26-03-2022-144

Title : Dichotomous Search in Dual Transformer Design for two Arbitrary Frequencies
Segundo Francisco Segura Altamirano, Diana Mercedes Castro Cardenas, Lucia Isabel Chaman Cabrera, Carlos Leonardo Oblitas Vera, Angel Marcelo Rojas Coronel,

Abstract : This article designs a dual transformer, which can be coupled or tuned to two arbitrary frequencies. We formulate this problem as a minimization problem of the Reflection Coefficient Γ_in, which allows us to find the impedances Z_1 and Z_2=Z_o R_l/Z_1 of the sections of the transmission line. We use Convex Optimization and the Dichotomous Search algorithm that allows us to find the parameters of the transmission lines. We show several results, and we include the case for operating frequencies of 700MHz (Band 7 - LTE) and 1900MHz (Band 2 -LTE).