Open AccessMicrostrip patch back radiation reduction using metamaterial superstrate
Author(s) -
Jafargholi Amir,
Jafargholi Ali,
Choi Jun H.,
Veysi Mehdi,
Soleimani Ali
Publication year - 2020
Publication title -
iet microwaves, antennas and propagation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.555
H-Index - 69
eISSN - 1751-8733
pISSN - 1751-8725
DOI - 10.1049/iet-map.2018.6237
Subject(s) - materials science , patch antenna , metamaterial , microstrip antenna , antenna (radio) , microstrip , optics , metamaterial antenna , attenuation , dielectric , optoelectronics , acoustics , antenna factor , physics , electrical engineering , engineering
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 0.6λ × 0.8λ × 0.14λ. 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.