Improving microstrip patch antenna performance using EBG substrates

Qu, Dan; Shafai, L.; Foroozesh, Alireza

doi:10.1049/ip-map:20060015

Cited by 94 publications

(45 citation statements)

References 2 publications

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“…One approach suggested is to design antenna and EBG separately like those in [21][22][23][24]. In this case the PEC-backed, FSS-element configuration embedded in dielectric layers is considered.…”

Section: Methods Of Designing Antenna-ebg Systemsmentioning

confidence: 99%

Bandwidth Enhancement of Microstrip Patch Antenna Using Jerusalem Cross-Shaped Frequency Selective Surfaces by Invasive Weed Optimization Approach

Monavar¹,

Komjani²

2011

PIER

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Abstract-In this paper, we present a novel approach for improving the bandwidth of a microstrip patch antenna using Jerusalem crossshaped frequency selective surfaces (JC-FSSs) as an artificial magnetic ground plane. The invasive weed optimization (IWO) algorithm is employed to derive optimal dimensions of the patch antenna and JC-FSS element in order for the whole structure to work at 5.8 GHz with consideration of gain. For the most efficient design, the antenna and FSS ground plane are optimized together, rather than as separate components. Simulation results demonstrate that this optimum configuration (the microstrip patch antenna over the artificial magnetic ground plane) have a broad bandwidth of about 10.44%. This wide bandwidth is obtained while the thickness of the whole structure is limited to 0.1λ. Further more desirable radiation characteristics have been successfully realized for this structure. The radiation efficiency of the AMC antenna configuration was found to be greater than 85% over the entire bandwidth. In general by introducing this novel Jerusalem cross artificial magnetic conductor (JC-AMC) in lieu of the conventional perfect electric conductor (PEC) ground plane, the bandwidth enhancement of about 67% and a thinner and lighter weight design has been obtained. Sample antenna and EBG layer are also fabricated and tested, to verify the designs. It is shown that the simulation data in general agree with the measurement results for the patch antennas implemented with FSS ground plane.

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Section: Methods Of Designing Antenna-ebg Systemsmentioning

confidence: 99%

Bandwidth Enhancement of Microstrip Patch Antenna Using Jerusalem Cross-Shaped Frequency Selective Surfaces by Invasive Weed Optimization Approach

Monavar¹,

Komjani²

2011

PIER

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“…However, using a thicker substrate causes generation of spurious radiation and there are some practical problems in decreasing the dielectric constant. The spurious radiation degrades the antenna parameters [2][3]. Now days defected ground microstrip patch antennas have been rapidly developed for multi-band and broadband in wideband communication systems [4][5][6].…”

Section: Introductionmentioning

confidence: 99%

Dual Band Gap Coupled Antenna Design with DGS for Wireless Communications

Kandwal

Sharma²,

Khah³

2014

AEM

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A novel gap coupled dual band multiple ring antenna with a defected ground structure (DGS) has been successfully implemented. A different technique is used in this communication where both gap coupling and defected ground are applied to obtain better results for wireless applications. The designed antenna operates in two different frequency bands. The antenna shows a wideband in C-band and also resonates in the X-band. The main parameters like return loss, impedance bandwidth, radiation pattern and gain are presented and discussed. The gain is increased and the side lobe level is considerably reduced to a good extent. Designed antenna is tested and the results show that the simulation and experimental results are in good agreement with each other.

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“…Unlike other normal conductors, EBG does not support propagating surface waves, and it reflects electromagnetic waves with no phase reversal [11]. The gain of antenna can be improved by using EBG structure in two different ways; EBG structure as a superstrate [12,13] and EBG structure as a ground plane [14,15]. The gain of any antenna can be increased by EBG structure in the frequency band where the EBG structure is having high surface impedance behaviour or band stop property such that in that band the propagation of surface wave is suppressed which improves the antenna gain or radiated power [16].…”

Section: Introductionmentioning

confidence: 99%

An Uwb Fractal Antenna With Defected Ground Structure and Swastika Shape Electromagnetic Band Gap

Kushwaha¹,

Kumar²

2013

PIER B

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Abstract-In this paper, an ultra wideband antenna employing a defected ground structure is presented. The radiating element is a circular patch on which a fractal based geometry is inscribed in the form of slots and excited by a tapered feed-line for impedance matching. The antenna has an impedance bandwidth of 8.2 GHz (117% at centre frequency of 7 GHz) and a peak gain around 6 dB. To improve the impedance bandwidth and gain, a Swastika shape Electromagnetic band gap (EBG) structure is proposed. The unit cell of the proposed EBG has a compact size of 3 mm×3 mm and is obtained by introducing discontinuities in the outer ring of the Cross-Hair type EBG. The stop band (−20 dB) achieved with this EBG is 3.6 GHz (7.5 GHz-11.1 GHz) which is 1.6 GHz more than that achieved by a standard mushroomtype EBG of the same size and same number of elements. After application of the proposed EBG, there is an improvement of 12% in the impedance bandwidth while the peak gain increases by about 2-3 dB. The radiation of the antenna shows a dumb-bell shaped pattern in the E-plane and Omni-directional pattern in the H-plane. All the measured results are in good agreement with simulated results.

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Improving microstrip patch antenna performance using EBG substrates

Cited by 94 publications

References 2 publications

Bandwidth Enhancement of Microstrip Patch Antenna Using Jerusalem Cross-Shaped Frequency Selective Surfaces by Invasive Weed Optimization Approach

Bandwidth Enhancement of Microstrip Patch Antenna Using Jerusalem Cross-Shaped Frequency Selective Surfaces by Invasive Weed Optimization Approach

Dual Band Gap Coupled Antenna Design with DGS for Wireless Communications

An Uwb Fractal Antenna With Defected Ground Structure and Swastika Shape Electromagnetic Band Gap

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