Impedance bandwidth improvement of a planar antenna based on metamaterial-inspired T-matching network

Alibakhshikenari, Mohammad, Virdee, Bal Singh, Shukla, Pancham, Wang, Yan, Azpilicueta, Leyre, Naser-Moghadasi, Mohammad, See, Chan, Elfergani, Issa, Zebiri, Chemseddine, Abd-Alhameed, Raed, Huynen, Isabelle, Rodriguez, Jonathan, Denidni, Tayeb A., Falcone, Francisco and Limiti, Ernesto (2021) Impedance bandwidth improvement of a planar antenna based on metamaterial-inspired T-matching network. IEEE Access, 9. pp. 67916-679227. ISSN 2169-3536

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Abstract / Description

In this paper a metamaterial-inspired T-matching network is directly imbedded inside the feedline of a microstrip antenna to realize optimum power transfer between the front-end of an RF wireless transceiver and the antenna. The proposed T-matching network, which is composed of an arrangement of series capacitor, shunt inductor, series capacitor, exhibits left-handed metamaterial characteristics. The matching network is first theoretically modelled to gain insight of its limitations. It was then implemented directly in the 50-Ohm feedline to a standard circular patch antenna, which is an unconventional methodology. The antenna's performance was verified through measurements. With the proposed technique there is 2.7 dBi improvement in the antenna's radiation gain and 12% increase in the efficiency at the center frequency, and this is achieved over a significantly wider frequency range by a factor of approximately twenty. Moreover, there is good correlation between the theoretical model, method of moments simulation, and the measurement results.

Item Type: Article
Uncontrolled Keywords: T-matching circuit; microstrip antenna; metamaterial; transmission-line; impedance matching
Subjects: 600 Technology > 620 Engineering & allied operations
Department: School of Computing and Digital Media
Depositing User: Bal Virdee
Date Deposited: 13 May 2021 09:04
Last Modified: 13 May 2021 09:04


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