Paper title: METHOD OF EXTRACTING THE EQUIVALENT CIRCUIT OF COMPLEMENTARY SPLIT RING RESONATOR LOADED TRANSMISSION LINE RELYING ON NEGATIVE PERMITTIVITY CHARACTERISTIC
Author(s): AMER ABBOOD AL-BEHADILI, TEODOR PETRESCU, IULIA ANDREEA MOCANU,
Abstract: In this work, a new approach for extracting electrical parameters of the equivalent circuit of complementary split ring resonators
(CSRRs) loaded transmission line, based on the frequency band where negative electrical permittivity occurs, is proposed. For this
reason, CSRR coupled to microstrip transmission line has been proposed and the behavior of the frequency band where negative
permittivity appears is investigated, in order to specify the fundamental frequencies that are needed to calculate the electrical
parameters of equivalent circuit. The procedure provides the electrical characteristics of CSRR (inductance, Lc , capacitance, Cc and
intrinsic resonant frequencies). The obtained equivalent circuit model of CSRR loaded transmission line has been simulated and a
good agreement is achieved between the results derived from the simulation and the ones form the equivalent circuit model. Further
validity of the usage circuit is confirmed by applying different lengths of transmission line (host line); in this case, the frequency
interval of negative permittivity band decreases and shifts to lower frequencies due to change in host line capacitance per unit cell.
Nevertheless, the results of minimum insertion loss which were determined by the provided equivalent circuit model (which are
proposed by the approach) are remaining compatible with the simulation. Ansoft HFSS (High Frequency Structure Simulator)
simulator and Matlab are used for structures’ design and analyzing the results.
Keywords: Metamaterials, Equivalent circuit of complementary split ring resonators (CSRRs), Split ring resonators (SRRs),
Microstrip technology Year: 2020 | Tome: 65 | Issue: 1-2 | Pp.: 81-85
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