High Directivity of Microstrip Patch Antenna using Metamaterial

International Journal for Scientific Research and Development, 2015

This paper focuses on improving the directive properties of a conventional patch antenna by using a known technique of applying metamaterial slab as a cover. The metamaterial under consideration is a modification of Pendry‟s SRR structure and is equivalent to two SRRs connected back to back. The unit cells were arranged in an array configuration, investigation of Sparameters was done for checking the Negative index property. As expected with the use of metamaterial as a cover, directionality of conventional patch antenna improved significantly and the 3 dB beam-width reduced. A conventional patch antenna generally shows 3 dB beam-width of ~80deg while the antenna presented in this paper with the metamaterial shows improved 3dB beam-width of 45 deg.

Advanced Computational Techniques in Electromagnetics, 2013

With the numerous increases in the use of microwave frequencies in communication applications, certain antenna potential characteristics should be an integral part of the design process. For example, GPS, WLAN are all applications that share common potential characteristics requirement in their antenna. A "FRAMED SQUARE RINGS" double negative inspired metamaterial structure was introduced as a cover to the rectangular microstrip patch antenna at a height of 3.2 mm from the ground plane, operating at 1.95 GHz. The results showed that the proposed metamaterial cover, effectively improves the patch antenna's gain and bandwidth. The complex permittivity and permeability of the proposed structure has been extracted by Nicolson-Ross-Weir (NRW) approach. The outcomes of this work open the possibility to use the proposed structure as a miniaturized and flexible antenna in L-Band for wireless communication applications.

In this paper we have discussed about different metamaterial structures. Metamaterial structures are artificially designed materials to provide properties that are not readily available in nature. The size minimization & high bandwidth of microstrip antenna plays important role in the development of communication systems. These characteristics can be obtained by the help of this artificial metamaterial structures like split ring resonator (SRR), complementary SRR, Defected ground structures etc. Metamaterial structured microstrip antenna exhibits negative permeability & permittivity which results into enhancement in antenna parameters like return loss, bandwidth, directivity, antenna gain etc. In this paper we have also discussed about different properties of metamaterial structure.

International Journal of Engineering Sciences & Research Technology, 2014

In this work, The drawback of Patch Antenna was impedance bandwidth. For this purpose, Rectangular microstrip patch antenna loaded with metamaterial structure has been proposed for improving the bandwidth by using CST MICROWAVE STUDIO in this paper. The proposed antenna is designed at a height 3.2 from the ground plane by using CST MICROWAVE STUDIO. The bandwidth of Microstrip patch antenna is 12 .1MHz and return loss is -10.36 dB at a band.The bandwidth of desired antenna is increased up 63.7 MHz at 2.865 GHz. The return loss of proposed antenna is reduced up to - 27.48 dB at 2.865 GHz. This proposed design has small size, easy to fabricate and better directivity.

2015

This paper presents the design of metamaterial based microstrip patch antenna for high frequency application. Work is mainly focused on improving the characteristics of microstrip patch antenna. Metamaterials have been intensively researched due to their particular features such as negative permittivity and/or permeability and ultra-refraction phenomenon. To satisfy the demand of commonly used wireless communication systems, an antenna which can operate at higher frequencies and enhanced characteristics are desirable. The arrangement of all elements is done that they provide an improvement into return loss by which we can notice other factors of antenna. The frequency response of a metamaterial can be tailored by varying its characteristics. A new metamaterial structure using square and ring split ring resonator is proposed. Using this metamaterial structure, a microstrip patch antenna is designed with enhanced characteristics such as reduction in return loss from -20 dB to -36 dB w...

2012 International Conference on Communication Systems and Network Technologies, 2012

In this paper a rectangular microstrip patch antenna along with a metamaterial structure is proposed at a height of 3.2mm from the ground plane, which consists of a Double F Shaped Resonator (DFR) with Horizontal Rectangular Strips. This work is mainly focused on increasing the bandwidth of low profile microstrip patch antennas. The patch antenna along with the proposed metamaterial structure is designed to resonate at 1.45GHz. The impedance bandwidth of the patch antenna along with the proposed metamaterial structure is improved by 19.7MHz. All the simulation work is done by using CST-MWS Software. Double-Negative properties (Negative Permeability and Permittivity) of the proposed metamaterial structure have also been verified using Nicolson-Ross-Weir method (NRW).

2013 International Conference on Electrical Information and Communication Technology (EICT), 2014

This article investigates how to enhance the gain of an edge feed rectangular patch array antenna for 5G application using two novel double negative metamaterial (DNG). After designing a unit cell at same frequency (28 GHZ) to the patch array antenna, we scale the unit cell to 10x5 and 5x4. By placing these metamaterial structures at a distance of 6mm in front of the patch array antenna, the gain was significantly improved as compared to the conventional edge feed antenna without metamaterial. The DNG metamaterial has a complex shape on one side of dielectric medium and a wire on other side. The first metamaterial is composed of 2.5 mm × 2.5 mm FR-4 with 0.254 mm thickness and dielectric constant of 4.3 and the second design is composed of 3 mm x 3 mm Rogers RO4460 with 0.254 mm thickness and permittivity 6.15. The antenna consist of Rogers/RT5880 material with dielectric constant of 2.2. Scattering parameters as well as permittivity, permeability and refractive index are determined from the Simulation of DNG structure using Computer simulation technology (CST) in microwave studio (MWS). This is a novel and promising design approach in the world of 5G communication to enhance the gain of antenna due to its simplicity, compatibility and characteristics of double-negative material.

Applied Physics A, 2016

A miniaturized dual-band antenna array using a negative index metamaterial is presented for WiMAX, LTE, and WLAN applications. This left-handed metamaterial plane is located behind the antenna array, and its unit cell is a combination of split-ring resonator, square electric ring resonator, and rectangular electrical coupled resonator. This enables the achievement of a metamaterial structure exhibiting both negative permittivity and permeability, which results in antenna size miniaturization, efficiency, and gain enhancement. Moreover, the proposed metamaterial antenna has realized dual-band operating frequencies compared to a single frequency for normal antenna. The measured reflection coefficient (S 11) shows a 50.25% bandwidth in the lower band (from 2.119 to 3.058 GHz) and 4.27% in the upper band (from 5.058 to 5.276 GHz). Radiation efficiency obtained in the lower and upper band are [95 and 80%, respectively.

IJEER, 2015

This work demonstrates integration of an artificial material onto a Rectangular Microstrip Patch Antenna to improve its performance. Such antennas are gaining a high interest as system designer require more complex function to be implemented in reduced area. The artificial material used is commonly called “Metamaterial” or “Left-Handed-Metamaterial (LHM)” and it exhibit some peculiar electromagnetic properties that don’t exist in nature. So, when a microstrip patch antenna is integrated using Left-Handed-Metamaterial, potential parameters like return loss, bandwidth, directivity, gain & efficiency etc. shows improvement. These antennas are cost-effective, more powerful and highly efficient in comparison to the basic microstrip antenna and have their applications in various commercial and military equipments. Proposed Antenna along with RMPA is designed to simulate at 2.4GHz. The designing and analysis has been done using the Computer Simulation Technology (CST-2010) software. The various parameters are compared and the results were deduces.

International Journal of Engineering Sciences & Research Technology, 2013

In this paper, a Symmetrical Rectangular Structure has been chosen to construct the metamaterial substrate due to the ability of constructing this shape, this structure produces a better performance compared to the other shapes. The implementation of the metamaterial as the substrate in a rectangular microstrip patch antenna produces high value of return loss. This high value of return loss indicates that only small amount of reflection waves were returned back to the source and most of the power will be radiated from the patch.CST MICROWAVE STUDIO isused to design the metamaterial based rectangular microstrip patch antenna.