Design and Implementation of a Low-Profile Patch Antenna for Industrial NB-IOT Applications

Abstract

For the requirement of NB-IOT applications, rectangular micro strip slot antennas have been developed with sufficient bandwidth of 112.5 MHz. The above 50% size of the antennas has been reduced by making multiple rectangular slots on the patch surface. Fr4 material has been utilized as a dielectric substrate. The position of the transmission line has been varied to match the perfect impedance matching. The proposed antenna model has been simulated on HFSS software. To check the practical behavior of the designed antenna, it has been fabricated and tested by using vector network analyzer. The proposed antenna has resonance frequency band from 1718.75 MHz – 1831.25 MHz with minimum return loss performance as below -20 dB.