Multiple-open-ended-slot antenna for integrated 4G/5G mobile application

Abstract

This paper demonstrates how multiple open-ended slot structures can be employed to design an integrated antenna that simultaneously covers the lower 4G/LTE band (800 MHz), upper 4G/LTE band (2 GHz), sub 6-GHz 5G band (3.5 GHz) and millimeter-wave 5G band (28 GHz). In this configuration, three open-ended slots with different sizes operating at the low frequencies range and an array of four Vivaldi antennas are placed altogether in a compact footprint of only 73 x 8:5 mm². The design is suitable for mobile application and can also be adapted for different devices.