@misc{10481/85550,
year = {2023},
month = {5},
url = {https://hdl.handle.net/10481/85550},
abstract = {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},
organization = {MCIN/AEI/PTA grant},
organization = {PTA2020-018250-I},
organization = {PAIDI 2020},
organization = {European Social Fund Operational Programme 2014-2020 under Grant 20804},
organization = {Ministerio de Universidades under Grant
CAS21/00483},
organization = {FEDER/Junta de Andalucía-Consejería de Transformación Económica, Industria, Conocimiento y
Universidades under Grants A-TIC-646-UGR20, B-RNM-375-UGR18},
organization = {P20_00633},
organization = {MCIN/AEI/10.13039/501100011033},
organization = {European Union
“NextGenerationEU”/PRTR},
organization = {PID2020-116518GB-I00},
organization = {TED2021-129769B-I00},
organization = {TED2021-129938B-I00},
publisher = {IEEE Xplore},
keywords = {Capacitive loading},
keywords = {Circuit analysis},
keywords = {Periodic structures},
keywords = {RF circuits},
keywords = {Transmission lines},
title = {A Novel Analysis of Periodic Structures Based on Loaded Transmission Lines},
doi = {10.1109/JMW.2023.3263194},
author = {Medina Rull, Alberto and Pasadas Cantos, Francisco and González Marín, Enrique and Godoy Medina, Andrés and García Ruiz, Francisco Javier},
}