Multilayered Cavity Material Radial Line Slot Array Antenna with Improved Bandwidth for 5G Communication Application

Abstract

Mobile broadband communication systems like the fifth generation (5G) will require large bandwidth allocation. Currently, the sweet spot is congested with no enough spectrum to support higher bandwidth allocation. The millimeter wave band is being explored to provide the needed spectrum with 28 GHz so far identified as a potential carrier frequency. Development of complimentary antennas for transmission and reception on the band therefore become necessary. This paper present the design of linearly polarized radial line slot array antenna at 28 GHz for mobile broadband communication system application. The antenna consists of radiating surface with radius ρ sitting on squared cavity and ground of side 2ρ. It is excited via a rear center mounted modified straight dielectric coated 50 Ω SSMA connector. The cavity is filled with layers of air space, low dielectric constant syntactic foam and high frequency laminate RT/duroid 5880. With ρ = 50 mm and a maximum total cavity height of 3.0 mm, the antenna was simulated using Computer Simulation Technology Microwave Studio 2014 software. A gain of 18.13 dB, directivity of 18.4 dBi, efficiency of 96 % and impedance bandwidth of up to 2.34 GHz were realized.

Highly Efficient Circularly Polarized Radial Line Slot Array Antenna Using Non-Uniform Slot Density for 5G Communication System

“…When the measured gain is compared, the prototype antenna has a better value than the large volume ones [16], [19], after the [30]. In addition, the measured gain value of the designed antenna is higher than both the same sized and smaller sized RLSA antennas [13], [14], [15], [17], [18]. The side lobe level of the new CP RLSA antenna has the second lower value after the [18].…”

“…In recent years, some studies, especially targeting low-cost and simple structures, operating at millimeter wave frequency have used printed circuit board (PCB) technology in antenna designs [13]. Some of these researches focused on increasing bandwidth and reducing sidelobe levels [14]- [16]. Highly efficient RLSA antenna studies which consist of two parallel metal plates have also been published to show some electrical parameters like aperture efficiency, directivity, etc.…”

Radial Line Slot Array Antenna Feeder Design Using Optimization Algorithm

“…Various studies adopted several architectures for the optimization of the RLSA feeder, this was aimed at improving bandwidth, directivity, gain and return loss, notable amongst this studies, is the works of, I. Maina, T. A. Rahman, M. Khalily, and S. I. Zakwoi. (2016), which adopted the use of a syntactic foam and an RT/duroid 5880 dielectric materials for a multilayer feeder design at 28GHz.…”