Antipodal Vivaldi Antenna Array for 5G mmWave Applications at 28 GHz

In this paper antipodal Vivaldi antenna (AVA) array is proposed for fifth generation mmWave applications. The proposed AVA array consists of 1×4 antenna elements and with dimensions $55.3\times 26.6\times 0.79\text{mm}^{3}$. The antenna is designed using Rogers RT/duroid 5880 material having dielectric constant 2.2 and this material have low dielectric losses and is suitable for high frequencies. Triangular corrugations, rhombus parasitic patches and SIW (substrate integrated waveguide) are used in antenna design for improvement of gain, bandwidth, and low radiation losses. The proposed antenna is operating from 25.78 GHz–30.74 GHz frequency range and antenna is resonating at 28.56 GHz. Gain is varies from 9.45 to 14.88 dBi in specified frequency band. The proposed antenna is designed using ansys HFSS tool.

I. Introduction

In fifth generation(5G) frequency range2(24.25 GHz–71.0 GHz) communication systems to reduce propagation losses, there is need of wide bandwidth and high gain antennas [1]. In recent times printed Vivaldi antennas are also frequently used in 5G applications [2]. Antipodal Vivaldi antennas (AVA) are suitable to provide wide bandwidth and high gain because of the tapered curve. Different methods like arrays, corrugations, parasitic patches, metamaterials and SIWs are also added to AVA antenna to obtain wide bandwidth and high gain [3].