1 Page 1-5 © MAT Journals 2017. All Rights Reserved Journal of Electronics and Communication Systems Volume 2 Issue 1 Tetra Band Floral Patterned Patch Antenna with CSRR in its Ground Plane Dr. R. Gayathri Rajaraman Assistant Professor, Department of Electronics & Communication Engineering, Annamalai University, Chidambaram, India E-mail: Gayathri_rajaraman@yahoo.co.in Abstract A compact floral patterned antenna using a novel metamaterial structure (CSRR) in its ground plane is presented. These metamaterial structures miniaturize the antenna, inducing tetra resonances. The antenna resonates at 4.735, 5.185, 6.08, 6.71 GHz with adequate gains of 2.87, 3.05, 3.76, 4.30 dB’s and a bandwidth of 56, 75, 50, 110 MHz in its resonances. The proposed antenna is targeted to create resonances in Radar and public Bands of frequency spectras. Key Antenna parameters obtained from the simulator are presented along with detailed discussions in this paper. Keywords: Microstrip patch antenna, linear polarization, wireless applications, radar, cable TV relay applications INTRODUCTION The concept of Metamaterials started with the prediction of backward waves and negative permeability, permittivity by Vessalago [1]. These artificial synthesized materials play a key role in antenna design, addressing multiresonances, gain enhancement, bandwidth enhancement requirements of wireless antennas. Two Phi shaped SRR placed back-back miniaturizing the MPA effectively is suggested by S. Vipul et al. This may find utility in space applications [2]. H. M. Lee suggested a modified planar antenna by designing a single unit cell of MTM using CRLH technique. Metal insulator metal (MIM) capacitor and microstrip stub inductors are used in this design as elements of CRLH. The design equations for design of micro strip stub inductor and capacitor are also explained in [3]. J. D. Baena et al. studied the equivalents of SRR and CSRR [4]. They also extracted the parameters of these structures both analytically as well as experimentally, particularly for microstrip technologies. X. Cheng et al. used CSRR in a flexible substrate to miniaturize the size of antenna down to 74%. This finds application in medical implantable antennas but the gain is found to be negative, which is a pre-requisite for such applications [5]. C. Wenquan et al. proposed the use of CSRR on the ground of MPA specially for beam steering while no metamaterial loading is seen on patch [6]. Many research articles using metamaterials for antenna design are seen in [8–13]. In this paper a floral patch design with CSRR in its ground plane resulting in a tetra band resonances is discussed. DESIGN OF PROPOSED ANTENNA The antenna is designed with RT Duroid substrate with relative permittivity of 2.2 and a thickness of 62 mils. Coaxial feeding is carried out [7]. Four turns of CSRR which exhibit negative permittivity features supporting backward waves are etched on ground planes besides etching a total of 24 triangles on patch surface yielding a floral pattern patch resonating at four different wireless spectras.