A Novel Analysis of Periodic Structures Based on Loaded Transmission Lines
Metadatos
Mostrar el registro completo del ítemAutor
Medina Rull, Alberto; Pasadas Cantos, Francisco; González Marín, Enrique; Godoy Medina, Andrés; García Ruiz, Francisco JavierEditorial
IEEE Xplore
Materia
Capacitive loading Circuit analysis Periodic structures RF circuits Transmission lines
Fecha
2023-05-29Referencia bibliográfica
A. Medina-Rull, F. Pasadas, E. G. Marin, A. Godoy and F. G. Ruiz, "A Novel Analysis of Periodic Structures Based on Loaded Transmission Lines," in IEEE Journal of Microwaves, vol. 3, no. 3, pp. 1019-1027, July 2023, [doi: 10.1109/JMW.2023.3263194.]
Patrocinador
MCIN/AEI/PTA grant; PTA2020-018250-I; PAIDI 2020; European Social Fund Operational Programme 2014-2020 under Grant 20804; Ministerio de Universidades under Grant CAS21/00483; FEDER/Junta de Andalucía-Consejería de Transformación Económica, Industria, Conocimiento y Universidades under Grants A-TIC-646-UGR20, B-RNM-375-UGR18; P20_00633; MCIN/AEI/10.13039/501100011033; European Union “NextGenerationEU”/PRTR; PID2020-116518GB-I00; TED2021-129769B-I00; TED2021-129938B-I00Resumen
Periodically loaded transmission lines are characterized by a frequency response with regular
pass and stopbands. Interestingly, each of the passbands exhibits a peculiar comb-alike behavior, in which
again, nested (or internal) pass and stopbands can be identified. In this work, we focus our attention on
the effect that changing the characteristics of the periodic load (which is a varactor capacitance in our
case) has in this peculiar response of the structure, providing a novel and detailed analysis of such bands.
The control of the response of the structure when changing the properties of the load allows to adjust the
transmission characteristics of the circuit once it is fabricated. To this purpose, we derive the design equations
of the periodically loaded structures, obtaining the expressions which govern the position and number of the
transmission peaks, i.e., the points where |S21| = 1 for both cases, the frequency sweep and the capacitance
sweep. We experimentally validate our analysis by fabricating a periodic structure with five unit cells and
compare the measurements against both theoretical results and circuit simulations to an excellent agreement.
The present analysis paves the way towards further exploitation of these kind of structures for the design of
different microwave applications such as tunable filters or phase shifters