International Research Journal of Engineering and Technology (IRJET)
e-ISSN: 2395-0056
Volume: 04 Issue: 07 | July -2017
p-ISSN: 2395-0072
www.irjet.net
Re-configurable Microstrip patch antenna applicable for Ultra wide (UW) band Arita Basumatary1, Anil Kumar2, Rajeev Paulus3 , A.K. Jaiswal4 , Ekta Chauhan5 1M.Tech
Scholar, Faculty of Electronics & Communication Engineering, SIET SHUATS, U.P, India Assistant Professor, Dept. of Electronics & Communication Engineering, SIET SHUATS, U.P., India 4Head of the Dept. Electronics & Comm. Engineering, SIET SHUATS, U.P., India 5Dept. of Physics, SIET SHUATS, U.P., India. ---------------------------------------------------------------------***--------------------------------------------------------------------2,3
Abstract: The designed antenna is about elliptical Microstrip patch antenna with a slot where two diodes are placed on the slot. The design of the antenna is based on diode conditions ON and OFF. This antenna is tested and simulated and the gain of antenna is being improved for different conditions at two frequencies 8.5306GHz and 8.7143GHz. Slot antenna works in single band and multiband frequency. The antenna has a substrate designed on FR4epoxy. A variation in parameters like radiated power, gain and directivity is achieved. Working and testing is done by utilizing simulator Ansoft HFSS. The results are checked and evaluated for the proposed antenna.
Key Words: Reconfigurable, Elliptical, Ultra Wide band, Slots, Diodes. 1. INTRODUCTION More than the past period of years the antennas have played very decisive role in the area of wireless communication. With the growing and increasing of the broadband technologies microstrip patch antenna is mostly favored. [1][3] It is utilized in numerous areas like satellite communication, aircrafts, missiles, GPS system and broadcasting. Certain credits of antenna are low cost light weight low profile, small size, polarization.[4][6] Basically the advancement of dual band antennas for the extension in the wired antennas was done . The configuration of internal handset antennas are accomplished by rectifying the size of small antenna.[6] With broadening of the cellular communication the dual frequency came into scenario having a useful benefit comparatively exquisite electric aspects, compressed in geometry, cheap and adequate function that can be established for a single coaxial feeding.[7][8] Likewise, the Reconfigurable Antennas has a great significance in wireless communication consist extensively for defense and in the market. The antenna could be reconfigured making use of the diodes.[9] It has the potential to modify the operating frequency, radiation pattern & polarization in form of real time.[11]Moreover, when the antennas are Reconfigurable the polarization involves linear, right- hand & left- hand polarization.[12] The extreme hindrances of patch antenna bandwidth is restricted, gain is not high, little efficiency, lesser power and inadequate polarization. Therefore, in order to conquer the indicated numerous obstacles few resolutions have been Š 2017, IRJET
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recommended for instance slots, coaxial probe feeding techniques and diodes. [1-2] Furthermore another specific approach is the utility of peculiar model of the patch which aims resonance at frequency & hides surface current waves considering modes. Since the relevance of the applicability of Elliptical Patch antenna came into existence the consequence of the fact that category regarding insignificant character sketch of antenna have larger capacity. We can also regulate contrasting shapes in the manner of circular, rectangular, square, helical & elliptical shape.[2] Considering the polarization of ellipse the tangential part of the elliptical angle shows the proportion of minor axis to major axis.[10] Including the consideration of slots where diodes are positioned the gain, low permittivity & bandwidth of patch antennas can be progressed. Through controlled slots, Patch antennas get impacted. Diodes and capacitor have a positive display on patch antenna.[4] Henceforth this conditions can execute the demands for the evolution of wireless technologies. 1.1 Antenna Configuration In this antenna the dimension of the substrate is 30mm x 30mm x 1.8mm at position -15, -15, 0. The material used for the substrate is FR4epoxy. Dimensions are 0mm x 0mm x 1.8mm where radius is taken as 7mm and ratio 2. The elliptical patch has been divided into two section by a slot and in between the divided section two square slots are notched placing two diodes into square shape. The material of the diode taken is copper. Both the dimension of diode is 2mm x 2mm x 1mm. The copper diodes behaves as a switch. The coaxial feeding is terminated using cylinder 2 and cylinder 3 as pec. Slot with two diodes are attached to the patch.
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