Gain Enhancement and Wideband RCS Reduction of a Microstrip Antenna Using Triple-Band Planar Electromagnetic Band-Gap Structure

Abstract

Abstract-A triple-band planar electromagnetic band-gap (EBG) structure used for gain enhancement and wideband radar cross section reduction (RCSR) of antenna is presented in this paper. Three bandgaps of an EBG structure are realized by introducing two planar spiral inductances on a planar EBG structure. An equivalent model of EBG is given to further understand the formation of three band-gaps. The proposed EBG is placed around antenna units and arrays to calculate the affection of the RCS and the gain. Due to the band-gaps of the EBG structure, RCS of antennas is reduced, and the gain of antennas is enhanced. Results show that the RCS is reduced as much as 20 dB from 9 GHz to 21 GHz, and both of bandwidth and gain of antennas can be slightly enhanced. Two antenna units operating at 8.6 GHz are fabricated and measured to verify the correctness of simulation. Measured and simulated results are in good agreement.

Gain enhancement of a wideband rectangular ring monopole millimeter‐wave antenna using artificial magnetic conductor structure

“…[6][7][8] Moreover, various methods of metamaterials and reflectors have been reported to improve predominantly the radiation properties of the antennas. [9][10][11][12][13][14][15][16] A defected ground structure (DGS), 9 a metamaterial structure with 2 Â 5 unit cells in ground plane, 10 electromagnetic bandgap surfaces (EBG), 11 frequency selective surfaces (FSS), 12 metasurfaces (MTS), 13 high impedance surfaces (HIS), 14 and artificial magnetic conductor (AMC) surfaces 1,2, [15][16][17][18][19] were used to enhance mainly the radiation performance of the reported antennas.…”

“…In the categories of techniques, [9][10][11][12][13][14][15][16][17][18][19] the AMC structures (periodic arrangement of unit cells) have great interest in research due to their high impedance surface and in-phase reflection property. This indicates that it can be used to reflect the incident wave with a 0 (inphase) reflection phase, like a perfect magnetic conductor (PMC).…”

“…The broadband, wideband, and high gain antennas are preferable because they met the requirement of very high channel capacity and low latency of 5G communication. The numerous antennas for different categories are reported for sub‐6 GHz and mmWave systems by the researchers and focused mainly on the enhancement of the bandwidth and radiation performance of the antenna 1–34 . The bandwidth of the diverse antennas was enhanced by introducing various elementary techniques such as multilayer configuration, 1 tapering of the structure, 2 waveguide aperture/proximity coupled/differential feeding and parasitic elements, 3–5 and embedding stubs/strips/slots in the ground plane/radiating patches 6–8 .…”

“…The bandwidth of the diverse antennas was enhanced by introducing various elementary techniques such as multilayer configuration, 1 tapering of the structure, 2 waveguide aperture/proximity coupled/differential feeding and parasitic elements, 3–5 and embedding stubs/strips/slots in the ground plane/radiating patches 6–8 . Moreover, various methods of metamaterials and reflectors have been reported to improve predominantly the radiation properties of the antennas 9–16 . A defected ground structure (DGS), 9 a metamaterial structure with 2 × 5 unit cells in ground plane, 10 electromagnetic bandgap surfaces (EBG), 11 frequency selective surfaces (FSS), 12 metasurfaces (MTS), 13 high impedance surfaces (HIS), 14 and artificial magnetic conductor (AMC) surfaces 1,2,15–19 were used to enhance mainly the radiation performance of the reported antennas.…”