Influence of EBG Structures on the Far-Field Pattern of Patch Antennas (original) (raw)

Effect of EBG Structures on the Field Pattern of Patch Antennas

International Journal of Electromagnetics ( IJEL )

The incorporation of number of unit cells in EBG arrangement produces two major side effects on the performance of patch antenna. First one is parasitic loading, this causes multi resonance in antenna hence obtains some enhancement in antenna band width. Second one is cavity effect, this reflects some of energy from EBG toward antenna which results in reducing bandwidth. Present paper, rectangular microstrip patch antenna is surrounded by number of EBG rows is designed; and the results of proposed antenna with a conventional patch antenna is presented comparatively.

B3. Improving the Radiation Characterstics of Patch Antenna Arrays Using Two EBG Structures

A method of improving the radiation characteristics of the patch antenna arrays using two different electromagnetic bandgap (EBG) structures is presented. The proposed antenna arrays are designed for low-loss, high-gain and low sidelobe levels (SLL) at far field applications. It is composed of a coaxial probe driven square patch operating at 4 GHz. Two mushroom EBG layers are introduced around the patch array. One is a mushroom while the other is using a planar EBG. By using these EBG structures, both gain and sidelobe levels are improved. All simulation results are demonstrated.

IMPROVING THE PERFORMANCE PARAMETERS OF MICROSTRIP PATCH ANTENNA BY USING EBG SUBSTRATE

The objective of this paper is to analyze the performance of electromagnetic band gap (EBG) antenna for base station applications through simulation. The proposed analysis is carried out using the high frequency structure simulator (HFSS). In our method, to overcome several intrinsic limitations of patch antennas such as constrict bandwidth, low gain, excitation of surface waves, the EBG concept is applied. The patch antenna and patch antenna surrounded by the EBG cells are characterized in terms of return loss and radiation pattern in an anechoic chamber.

Comparative Analysis of EBG Structure and its Application on Microstrip Patch Antenna

2016

In this paper we have presented atwo new EBG structure with its radiation pattern, S-parameter, VSWR and Gain respectively. Also this new EBG structure is compared with different Mushroom-like EBG structure. Both of these EBG structures have a substrate with same size and same material and also there is no connecting via between its ground plane and patch, contrary to Mushroom-Like EBG structure. At the end, it was resulted that the gain of antenna has increased noticeably by using the EBG structures.

Parametric Performance Analysis of Patch Antenna Using EBG Substrate

International Journal of Wireless & Mobile Networks, 2012

In recent years, microstrip antennas become very popular because of their interesting advantages of low cost, low profile, light weight, easy fabrication and ease of analysis. Electromagnetic Band Gap (EBG) substrate is used as a part of antenna structure to improve the performance of the patch antenna. Usually, the performance of a patch antenna depends on the parameters such as Return Loss (RL), Bandwidth (BW), Gain, and Directivity. In this paper, we propose a rectangular microstrip patch antenna with EBG substrates of different EBG patch width and analysis the performance of the proposed antenna compare with a conventional patch antenna using the same physical dimension using HFSS simulator. Here we show four analyses of our designed antenna and compare with the conventional microstip patch antenna. Comparison results show that, the performances of our proposed schemes are better comparing the conventional patch antenna.

EBG Structures Properties and their Application to Improve Radiation of a Low Profile Antenna

Journal of Information Systems and Telecommunication (JIST), 2013

In this paper we have studied the characteristics of mushroom-like Electromagnetic Band Gap (EBG) structure and performance of a low profile antenna over it. Afterward, a novel EBG surface is presented by some modifications in mushroom-like EBG structure. This structure, which has more compact electrical dimensions, is analyzed and its electromagnetic properties are derived. Results show that resonant frequency of this novel structure is about 15.3% lower than the basic structure with the same size. Moreover, the novel EBG structure has been used as the ground plane of antenna. Its application has improved radiation of a low profile dipole antenna. The antenna performance over the new EBG ground plane is compared with the conventional mushroom-like EBG structure. Simulation results show that using this slot loaded EBG surface, results in 13.68dB improvement in antenna return loss, in comparison with conventional mushroom-like EBG, and 33.87dB improvement in comparison with metal ground plane. Besides, results show that, EBG ground planes have increased the input match frequency bandwidth of antenna.

ENHANCED GAIN AND BANDWIDTH OF PATCH ANTENNA USING EBG SUBSTRATES

Microstrip patch antenna becomes very popular day by day because of its ease of analysis and fabrication, low cost, light weight, easy to feed and their attractive radiation characteristics. Although patch antenna has numerous advantages, it has also some drawbacks such as restricted bandwidth, low gain and a potential decrease in radiation pattern. In recent years, attention to use Electromagnetic Band Gap (EBG) substrates to overcome the limitations of patch antenna. In this paper, we propose a rectangular microstrip patch antenna with EBG substrates and compare the performance of the proposed antenna with a conventional patch antenna in the same physical dimension. Due to the presence of the EBG structure in the dielectric substrates, the electromagnetic band gap is created that reduces the surface waves considerably. As a result, the performance of the proposed antenna is better comparing the conventional existing microstrip patch antenna. KEYWORDS Microstrip patch antenna, Electromagnetic band gap (EBG) substrates, Gain and Bandwidth.

Design Anaysis of Patch Antenna Using Ebg Structure

Journal of emerging technologies and innovative research, 2018

Technology has become the most vital part of the daily life. With the development of antenna technology, the wireless devices became more capable of providing the services like Wi-BAN, point-to-point bridge, hotspot, public wireless, Wi-MAX, WLAN, Wi-Fi and wireless video systems. In this research work, we have been demonstrating the design composition of patch antenna backed by the electromagnetic band gap (EBG) structure to be operated at 4.8 GHz of resonant frequency. The dispersion diagram provides the aid to determine the bandgap characteristics of EBG structure. To cover the required band gap of 4.8 GHz, the dimensions of EBG structure are tuned and adjusted. The EBG was analyzed and implemented on coaxial feed microstrip patch antenna in order to determine the S11 parameter performances. Better results have been attained at a distance of -10 mm between the patch antenna and EBG in comparison to other varied distances. Index Terms Dispersion curve, Electromagnetic Band Gap (EB...

Performance enhancement of a compact patch antenna using an optimized EBG structure

Chinese Journal of Physics, 2021

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Electromagnetic Band Gap (Ebg) Structure Antenna Design for Wide Band Applications

International Journal of Advance Engineering and Research Development, 2015

Electromagnetic band gap (EBG) structures that are engineered to achieve desired transmission and reflection characteristics in specific frequency bands, have long been actively studied in the microwave regime for a wide variety of applications. They have also been used as superstrates for directivity enhancement of antennas as well as substrates for height reduction of conformal antennas.In this study we develop some guidelines for systematically designing Enhanced Bandwidth antenna systems, comprising of a microstrip patch antenna (MPA) covered by a planar EBG substrate. At the beginning, the investigations of EBG were mainly on wave interactions of these structures at optical frequencies and hence PBG emerged with the name of photonic band-gap structures.EBG is due to the interplay between macroscopic and microscopic resonances of a periodic structure.The major Area of interest EBG structure gain with its enomourous advantage it offers like Mutual Coupling, Surface Wave Suppression at microwave frequencies. In my study I Concentrate on Mashroom EBG antenna which is a part of planer structure of microstrip patch array and using multiple layers of substrate we can achieve great Bandwidth enhancement.