RT Journal Article
T1 Performance Evaluation of Broadband Characterization of Coupled Transmission Lines Even- and Odd-Mode Propagation Constants Using Differential and Common Mode S-Parameters
A1 Pérez-Escribano, Mario
A1 Márquez-Segura, Enrique
K1 Ingeniería informática
K1 Microchips
K1 Telecomunicaciones
AB This work encompasses some relevant issues that arise when using a broadband method tocharacterize the even and odd mode propagation constants of symmetric microstrip coupled lines usingfour-port pure-mode differential and common mode S-Parameters. Correct excitations of differential andcommon modes play a significant role in experimental results. From these 4-port measurements, parameterscorresponding to the even and odd modes can be extracted from the multi-mode generalized S-parametersobtained by the vector network analyzer. Differential and common mode sub-matrices are considered astwo independent equivalent 2-port transmission lines. The method will be applied to extract the propagationconstants of even and odd modes of coupled microstrip transmission lines. A discussion is included onensuring the correct excitation of the modes in the structure and avoiding possible unwanted effects suchas radiation, that negatively affects the final estimation, both in phase and attenuation. Two figures of meritare defined to evaluate how transitions affect the performance of the method. These figures of merit allowa reasonable estimation of how the final experiment is affected by selected excitation of modes. To assessthe theory presented, two sets of seven lines of different lengths are manufactured. The experimental resultsshow an excellent agreement, both with electromagnetic simulations and with the analytical model used, forthe phase constant in the improved case of 30° bends, and an improvement in the useful bandwidth of the attenuation constant. This fact verifies the correct functioning of the method. In addition, the measurements arepresented in the range of 0.01–67 GHz, which represents a significant advance in bandwidth for this type ofstructure.
PB IEEE Journal of Microwaves
YR 2023
FD 2023
LK https://hdl.handle.net/10630/25794
UL https://hdl.handle.net/10630/25794
LA spa
NO M. Pérez-Escribano and E. Márquez-Segura, "Performance Evaluation of Broadband Characterization of Coupled Transmission Lines Even- and Odd-Mode Propagation Constants Using Differential and Common Mode S-Parameters," in IEEE Journal of Microwaves, doi: 10.1109/JMW.2022.3232306.
DS RIUMA. Repositorio Institucional de la Universidad de Málaga
RD 19 ene 2026