[Chalisgaonkar, 2(12): December, 2013] ISSN: 2277-9655 Impact Factor: 1.852 http: // www.ijesrt.com(C)International Journal of Engineering Sciences & Research Technology [3503-3508] IJESRT INTERNATIONAL JOURNAL OF ENGINEERING SCIENCES & RESEARCH TECHNOLOGY Design and Performance Analysis of Patch Antennausing Metamaterial Sachin Chalisgaonkar *1 , Santosh Sharma 2 *1 Department of Electronics and Communication, Student, MPCT Gwalior, India 2 Department of Electronics and Communication, Assistant Professor, MPCT Gwalior, India sachin.chalisgaonkar83@gmail.com Abstract 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. Keywords: Rectangular microstrip patch antenna (RMPA), Metamaterial (MTM) Impedance Bandwidth, Return loss. Introduction The concept of such antennas though introduced in early1950‟s in US by Deschamps& in France by Gutton&Baissinot,it was in 1970‟s only that with advent of Printed Circuittechnology, some serious advancement in this research area had begun [2]. A Microstrip device literally means asandwich of two parallel conducting layers separated bysingle thin dielectric substrate. The lower conductor is called Ground Plane & the upper conductor is a simple resonantCircular/ rectangular Patch. The metallic patch (usually Cu orAu) may take many geometrics viz. rectangular, circular,triangular, elliptical, helical, ring etc.The IEEE definition of Antenna [IEEE std. 145- 1983] says:Antenna is a means “for radiating or receiving radio waves”[1]. In addition to receiving or transmitting energy, an antennain an advanced wireless system is usually required tooptimize or accentuate the radiation energy in some directions and suppress it in others. Thus antenna is a directionaldevice as well as probing device. The field of Antennas isvigorous and dynamic and planar oriented antennas such asMicrostrip Patch has attracted significant attention primarily for space borne applications. A microstrip antenna is characterized by its Length, Width, Input impedance, and Gainand radiation patterns. The microstrip antenna consists ofconducting patch on a ground plane separated by dielectric substrate. This concept was undeveloped until the revolution in electronic circuit miniaturization and large-scale integration in 1970. After that many authors have described the radiation from the ground plane by a dielectric substrate for different configurations.The early work of Munson on micro strip antennas for use as a low profile flush mounted antennas on rockets and missiles showed that this was a practical concept for use in many antenna system problems. Various mathematical models were developed for this antenna and its applications were extended to many other fields. The number of papers, articles published in the journals for the last ten years, on these antennas shows the Importance gained by them. The micro strip antennas are the present day antenna designer’s choice. Low dielectric constant substrates are generally preferred for maximum radiation. The conducting patch can take any shape but rectangular and circular configurations are the most length of the antenna is nearly half wavelength in the dielectric; it is a very critical parameter, which governs the resonant frequency of the antenna. There are no hard and fast rules to find the width of the patch. There are many kinds of materials used to improve the gain of microstrip patch antenna. Among them, Metamaterial [4-6] are found most suitable. Metamaterials have opened an exciting field to realize unexpected physical properties and applications, which are not possible from naturally occurring materials. Conductive or dielectric inclusions in metamaterials can be tailored in shape and size, periodicity, and defects to produce unusual yet exciting properties. Unusual properties such as, negative permittivity and permeability, negative refraction at the interface of two (RH and LH) media [7]. Metamaterial are artificial structure that can be design to exhibit specific electromagnetic proper-ties that doesn't found in the nature. In Greek “Meta‟ means “beyond‟[1]. These