Multiband UWB Antenna design for WiFi, LTE and 5G

Abstract

In this thesis, a new design of an ultra-wideband planar slot antenna is presented. The antenna is made on FR4 and the design is compact with a size of 109.2 mm × 156 mm. The bandwidth of the antenna was measured to be 7.5 GHz ranging from 1.2 GHz to 8.7 GHz. The antenna is installed with a reflector plate at the distance of 30 mm which increases the directivity of the antenna and increases the antenna gain. The bandwidth is from 560 MHz to 8.7 GHz when the reflector plate is removed. The antenna was first designed and simulated in CST and later produced and measured in an antenna lab at NTNU. The antenna is linear horizontal polarized and the beam pattern have a wide beam of 60 degree in the horizontal and vertical plane for frequencies under 2.5 GHz. In simulations, an absorbent was added to improve the beam patterns for the antenna. The absorbent was not added to the produced antenna that was measured.