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.