Microstrip patch back radiation reduction using metamaterial superstrate

Amir Jafargholi; Ali Jafargholi; Jun H. Choi; Mehdi Veysi; Ali Soleimani

doi:10.1049/iet-map.2018.6237

Microstrip patch back radiation reduction using metamaterial superstrate

Amir Jafargholi
, Ali Jafargholi
, Jun H. Choi
, Mehdi Veysi
, Ali Soleimani

Department of Electrical Engineering

University at Buffalo

Amirkabir University of Technology
University of California at Irvine

Research output: Contribution to journal › Article › peer-review

15 Scopus citations

Abstract

The capability of the capacitively loaded loop (CLL) metamaterial (MTM) superstrate to attenuate surface waves thereby reducing the back radiation of microstrip patch antennas is examined. To understand the surface wave suppression mechanism, theoretical approaches of a grounded dielectric slab waveguide is provided. Both theoretical and numerical analyses show that the proposed superstrate causes a drastic attenuation of surface wave propagation. To confirm the numerical simulations, the proposed antenna is fabricated and tested. The dimensions of the CLL-MTM covered patch antenna are 0.6γ × 0.8γ × 0.14γ. The radiated gain and efficiency are measured at 7.8 dB and 95%, respectively. Measurements show that the front-to-back ratio is enhanced by more than 12 dB. In comparison with the patch antenna without the CLL-MTM superstrate, the proposed antenna reduces the gain and efficiency by less than 0.1 dB and 2%, respectively.

Original language	English
Pages (from-to)	158-164
Number of pages	7
Journal	IET Microwaves, Antennas and Propagation
Volume	14
Issue number	2
DOIs	https://doi.org/10.1049/iet-map.2018.6237
State	Published - Feb 5 2020

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title = "Microstrip patch back radiation reduction using metamaterial superstrate",

abstract = "The capability of the capacitively loaded loop (CLL) metamaterial (MTM) superstrate to attenuate surface waves thereby reducing the back radiation of microstrip patch antennas is examined. To understand the surface wave suppression mechanism, theoretical approaches of a grounded dielectric slab waveguide is provided. Both theoretical and numerical analyses show that the proposed superstrate causes a drastic attenuation of surface wave propagation. To confirm the numerical simulations, the proposed antenna is fabricated and tested. The dimensions of the CLL-MTM covered patch antenna are 0.6γ × 0.8γ × 0.14γ. The radiated gain and efficiency are measured at 7.8 dB and 95\%, respectively. Measurements show that the front-to-back ratio is enhanced by more than 12 dB. In comparison with the patch antenna without the CLL-MTM superstrate, the proposed antenna reduces the gain and efficiency by less than 0.1 dB and 2\%, respectively.",

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T1 - Microstrip patch back radiation reduction using metamaterial superstrate

AU - Jafargholi, Amir

AU - Jafargholi, Ali

AU - Choi, Jun H.

AU - Veysi, Mehdi

AU - Soleimani, Ali

PY - 2020/2/5

Y1 - 2020/2/5

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AB - The capability of the capacitively loaded loop (CLL) metamaterial (MTM) superstrate to attenuate surface waves thereby reducing the back radiation of microstrip patch antennas is examined. To understand the surface wave suppression mechanism, theoretical approaches of a grounded dielectric slab waveguide is provided. Both theoretical and numerical analyses show that the proposed superstrate causes a drastic attenuation of surface wave propagation. To confirm the numerical simulations, the proposed antenna is fabricated and tested. The dimensions of the CLL-MTM covered patch antenna are 0.6γ × 0.8γ × 0.14γ. The radiated gain and efficiency are measured at 7.8 dB and 95%, respectively. Measurements show that the front-to-back ratio is enhanced by more than 12 dB. In comparison with the patch antenna without the CLL-MTM superstrate, the proposed antenna reduces the gain and efficiency by less than 0.1 dB and 2%, respectively.

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JF - IET Microwaves, Antennas and Propagation

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Microstrip patch back radiation reduction using metamaterial superstrate

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