01-10-2016, 02:57 PM
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Abstract-In this paper,dual bowtie-shaped antenna has been designed and analyzed in the frequency range of 22.2-80 GHz for fifth generation (5G) applications. Rogers RT/duroid material with r = 2.2 is used as substrate.The dimension of antenna is 70×60×1.6 mm3. The performance analysis is carried out at different frequencies taking into account of the results of return loss, radiation pattern, VSWR and gain for 5G applications. The peak gain of 28.9 dB and maximum return loss of -29.20 dB are achieved at frequencies 64.19 GHz and 62.9 GHz respectively. A 50-ohm micro strip line is used to feed the Bow -Tie antenna. High Frequency Structure Simulator (HFSS) is used for the simulation of this design.
I. INTRODUCTION
Compact size, light weight and minimum cost would be the main goal that is being considered in the antenna design .Wide bandwidth is considered to be the advantageous part of Bowtie slot antennas. Way back in the year 1996, the bow-tie structure was first proposed by George and others [1]. A bow-tie patch is an amalgamation of imaginary image of two triangular patches which are fabricated in a single substrate [2].The difference between mm wave communications and existing other communication systems, in terms of high propagation loss, is directivity. These characteristics of mm wave communications pose several challenges to fully utilize the potential of mm Wave communications. Since mobile data demand is on the increase and the fifth generation (5G) mobile network would utilize enormous amount of spectrum in the millimeter wave (mm Wave) bands to greatly increase communication capacity. Due to the explosion of mobile traffic, 5G cellular network requires evolution to increase the system rate 1000 times higher than the current systems in 10 years, while maintaining good performance in terms of gain and efficiency [3].The various mm-wave technologies at 24-GHz and 60-GHz carrier frequencies that offer high and robust wireless connectivity capacities are suitable for future 5G networking architectures and 5G converged networks need to support applications requiring ultra-high speed wireless links exceeding 1 Gb /s [4]. Apart from this a number of papers are published in the literature on bow-tie antennas for the applications in mm wave and 5G wireless communications [5-12].
II. ANTENNA DESIGN
Antenna is designed on Roger RT/duroid substrate with thickness 1.6 and dimension is 70x60 mm2. The top view of antenna is given in Fig.1. Bow - tie shaped antenna is fabricated on substrate and dimensions as follows: a =30mm, b=25mm, c = 2.5mm, d = 5mm, e= 15mm. Antenna is designed in such a way that all the sides are symmetrical and feed line of width 5mm is given and created with a length 15mm till it touches the substrate edge.
RESULTS AND DISCUSSION
The return loss vs. frequency plot for the proposed antenna is shown in fig.2. Different Frequency bands In Millimeter range is obtained in this design .The maximum return loss is obtained at frequency 62.9 GHz as -29.20 dB, which is expected for the 5G applications.
CONCLUSIONS
This paper proposes a compact, simple and multiband antenna for mm wave and 5G applications. Roger RT/duroid substrate is used as substrate with dimension of 70x60x1.6 mm3 and dielectric permittivity (r) as 2.2.Dual bowtie-shaped antenna is designed and simulated for the return loss having less than -10 dB for wide range of frequency range spanning from 22.2 to 80 GHz. The bands are obtained at 65.80GHz, 62.9 GHz, 58.90 GHz, 54.70GHz, 53.00GHz, and 50.90 GHz with the VSWR 1.19, 1.07, 1.20, 1.17, 1.19 and 1.20 respectively. This antenna is useful for different 5G wireless applications.