Design of a highly miniaturized novel electromagnetic bandgap (EBG) material for performance improvement in microwave components

Author:

Mohan C,Esther Florence S,Vimal Samsingh R,Ahmed Naveed

Abstract

Abstract In this paper, a new uniplanar compact spiral-shaped asymmetric electromagnetic bandgap structure for a low-profile antenna is proposed. The proposed EBG design is constructed, with four spiral-shaped radiators are combined with centre element, which printed on an FR-4 dielectric material. The miniaturisation of the EBG unitcell has been achieved by increasing the electrical length of the radiating element. The overall dimensions of the proposed EBG structure is very low about only 0.03 λ0 × 0.03 λ00 is the free space wavelength at the resonating frequency of 2.4 GHz). Miniaturization of the proposed EBG structure is 86 % obtained when compared to conventional EBG structure for 2.4 GHz. This spiral-shaped EBG design can adequately suppress surface wave and it exhibits effective band-stop response at resonant frequency 2.4 GHz. The proposed EBG structure also provides improved performance especially peak gain, when it is placed beneath the antenna. A significant improvement in peak gain up to 1.7 dB and 15 % bandwidth at resonant frequency 2.4 GHz has been achieved after integration with proposed EBG design.

Publisher

IOP Publishing

Subject

General Medicine

Reference20 articles.

1. EBG structures: Practical tips and advice for antenna engineers;Kovacs;Radio Engrg,2012

2. Development of Electromagnetic Band Gap Structures in the Perspective of Microstrip Antenna Design;Shahidul Alam;International Journal of Antennas and Propagation,2013

3. Design and optimization of uniplanar EBG structures for low profile antenna applications and mutual coupling reduction;Assimonis;IEEE Trans. Antennas Propag,2012

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