Open AccessMeta‐surfaces and antennas' radiation characteristics enhancement: planar microstrip and microstrip‐based quasi‐aperture antennas
Author(s) -
NirooJazi Mahmoud,
Denidni Tayeb A.,
Chaharmir Mohammad Reza,
Sebak Abdel R.
Publication year - 2014
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.2014.0117
Subject(s) - microstrip antenna , microstrip , planar , directional antenna , aperture (computer memory) , materials science , metamaterial antenna , optoelectronics , radiation , optics , patch antenna , super high frequency , slot antenna , physics , antenna (radio) , acoustics , electrical engineering , computer science , engineering , computer graphics (images)
Meta‐surfaces as artificial magnetic conductors or high impedance surfaces to control the electromagnetic fields excited by a microstrip patch resonator are investigated for planar and non‐planar structures. In the planar structure, two types of meta‐surfaces are used as electromagnetic transducers to transform the captured non‐radiating waves to radiated space waves, leading to about 4 dBi gain enhancement. Alternatively, by applying these surfaces as E ‐plane fences in two sides of a patch, a compact microstrip‐based quasi‐aperture antenna is proposed. The proposed antenna not only improves the gain up to 8 dBi, but also provides almost a symmetric radiation pattern by controlling the phase distribution of electric fields in the antenna aperture. Using near electric‐field pattern inspection and characterising the meta‐surfaces, the radiation mechanism of the proposed antennas are delineated. Two antenna prototypes are fabricated and tested and, confirming the simulated ones, the corresponding measured results are presented.