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
A Slotted Elliptical patch antenna with a shorting pin for C-band Applications Anisha S. Gill1, Anil Kumar 2, Ekta Chauhan3, A.K Jaiswal4 1 M.Tech
scholar, Department of Electronics and Communication, SIET, SHUATS, Uttar Pradesh, India Professor, Department of Electronics and Communication, SIET, SHUATS, Uttar Pradesh, India 3Assistant Professor, Department of physics, SBS, SHUATS, Uttar Pradesh, India 4Professor, Department of Electronics and Communications, SIET, SHUATS, Uttar Pradesh, India. ---------------------------------------------------------------------***--------------------------------------------------------------------2 Assistant
Abstract - In this paper, a novel design of an elliptical patch
antenna is presented for ultra wideband wireless communication applications. Designed Microstrip patch antenna consists of an elliptical patch which is found to resonate at frequencies 4.4897 GHz and 6.6938 GHz, with return loss -12.37 dB and -20.21 dB respectively with satisfactory radiation properties. The results are simulated by using a software called High Frequency Structure Simulator (HFSS 13.0). The proposed antenna is a compact design of 30mm × 30 mm2 area on the FR4-epoxy substrate with dielectric constant of 4.4 and thickness of 1.8 mm. The designed antenna structure with o.91 dBi and 5.77 dBi gain is planar, simple and compact hence it can be easily embedded in wireless communication systems and integrated with microwave circuitry for low manufacturing cost, this design is mainly suitable for C-band applications.
Key Words: Elliptical Patch, C-Band, Microstrip Patch Antenna, shorting pin, slot, HFSS
1.INTRODUCTION With the rapid development and advancement of the wireless communication systems, antennas have become an essential part of any wireless communication [1]. Out of many types of miniature antennas, microstrip patch antennas have drawn the maximum attention of researchers over past few decades [2],[3],[4],[5] because they provide significant advantages like low profile, low weight, low manufacturing cost, polarization diversity, ease of fabrication etc [1]. A microstrip antenna can simply be defined as a sandwich of two parallel conducting layers separated by a dielectric substrate. The upper conductor is a metallic patch and the lower conductor is a ground plane [6],[7]. The efficiency of a microstrip antenna depends upon patch size, shape, substrate thickness, dielectric constant of substrate, feed point type and its location, etc. The patch of microstrip antenna can be of shapes like circular, elliptical, triangular, helical, rectangular, etc. [8]. Since microstrip antenna has a drawback of narrow bandwidth, for this many solutions have been suggested including the use of different shapes of the patch, which covers multiple mode surface current waves, © 2017, IRJET
|
Impact Factor value: 5.181
|
which causes resonance at multiband frequencies and finally widen the impedence bandwidth across UWB range. [6], [7]. The UWB operates over an ultra wide bandwidth with satisfactory radiation properties over the entire frequency range, a good impulse response with minimal distortion and low power utilization [9]. Microstrip patch antenna with elliptical shape also called as EMSA are the ones considered for antenna design of this paper as their geometry has greater potential for a variety of low-profile antenna applications. Elliptical shapes are advantageous as they provide larger flexibility and they have largest bandwidth in the range of GHz [11], [12]. It is also found that elliptical shaped patch antennas may give better return loss, directivity, gain and radiation pattern when we are ready to compromise with the size of antenna [10]. But there is also a need for miniaturization of antenna so as to conveniently integrate within the compact communication equipment and devices. This need has opened large interest for developing compact antennas and their miniaturization techniques [13], [14]. There has been many techniques proposed and applied to microstrip patch antenna such as using dielectric substrate of high permittivity, slot on the radiating patch, defected ground structure at the ground plane or a combination of them [15], [16]. In this paper elliptical microstrip patch antenna using slot on the radiating patch.
2.PROPOSED ANTENNA DESIGN Substrate FR4-epoxy of dielectric constant 4.4 has been taken for this design. The antenna has been designed and simulated using Ansoft HFSS. The radiating patch of elliptical shape is considered with major axis as 14mm and ratio as 0.4mm and a slot is made at the center of the elliptical patch. The feed point is taken at position (-7,3,0) . A shorting pin of material copper is also used in this design of height 1.8mm and radius 0.5mm. Various parameters considered are indicated in the table below. Table -1: Antenna parameters Antenna design Parameters Substrate material Substrate thickness ‘H’
Values FR4 1.8mm
Length of Substrate ‘L’
30mm
ISO 9001:2008 Certified Journal
|
Page 2474