Performance analysis of electrically coupled SRR bowtie antenna for wireless broadband communications
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Performance analysis of electrically coupled SRR bowtie antenna for wireless broadband communications P. Dhanaraj1
•
S. Uma Maheswari2
Ó Springer Science+Business Media, LLC, part of Springer Nature 2020
Abstract This paper presents a broadband Bowtie antenna with metamaterial periodical structure for broadband wireless systems and emerging 5G communication frequency band. The modified Bowtie antenna operating from 4 to 6.8 GHz with electrically coupled split-ring resonator (ECSRR) unit cells are proposed and analyzed. In two element Bowtie antenna, the third tuning arms are included to improve matching in the proposed operating frequency band. Four different shaped electrically coupled split-ring resonator (triangle, elliptical, hexagon and pentagon) with negative permeability and negative permittivity metamaterial unit cells are proposed and their reflection properties are analyzed. The triangle shaped ECSRR have the broadband reflection phase property which can be used to enhance the gain of the Bowtie antenna. The 5 6 periodical ECSRR unit cell embedded with modified Bowtie antenna in FR4 epoxy substrate (r = 4.4, thickness = 1.6 mm, tan d = 0.025) was designed and fabricated. The presented Bowtie antenna design achieves a wide impedance bandwidth of 50% from 4 to 6.8 GHz (S11 10 dB) and maximum gain of 5.75 dBi. The designed metamaterial periodical structure has the reflection bandwidth of 4–6 GHz within 90 to ? 90 in reflection phase and zero degrees phase reflection at 5.5 GHz. The metamaterial embedded bowtie antenna achieves a maximum gain of 11.08 dBi at 5.5 GHz. By tilting the metamaterial periodical structure, the major lobe direction of the modified Bowtie antenna can also be tilted. The experimental results show that the major lobe of the antenna can be tilted 34 approximately for 30 tilting of metamaterial structure with maximum gain of 9.8 dBi. Keywords Antenna Broadband wireless systems 5G communication networks Performance analysis Bowtie Metamaterial
1 Introduction In recent periods, there are many kinds of researches evolving to satisfy the needs of 5G wireless networks. The 5G having very high spectrum efficiency, very high data rate, and low latency when compared to previous generation communication systems [1, 2]. Antennas are very important in the broadband wireless networks and 5G wireless network communications to improve the channel capacity and quality of the transmission. For compact and & P. Dhanaraj [email protected] 1
Department of ECE, RVS College of Engineering and Technology, Coimbatore, Tamilnadu, India
2
Department of ECE, Coimbatore Institute of Technology, Coimbatore, Tamilnadu, India
efficient 5G systems and broadband wireless applications, the design of antennas plays a vital role. To meet the very high demand for the 5G spectrum, the design of antennas for the emerging frequency band (C-band 4.4–5 GHz) is very crucial [21]. The design of broadband and higher gain antennas are significant for the c
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