5G Broadband Antenna for sub-6 GHz Wireless Applications

This paper presents a single antenna supporting all sub-6 GHz bands of 2G/3G/4G/5G, Bluetooth, and WiFi radio in a very thin and compact form-factor of 50 × 19.75 × 0.8 mm
³
for mobile devices. The antenna consists of branched monopole antennas, T-shaped element, passive element, and one matching stub applied with tapering and meandering techniques, while the coupling among elements are optimized to minimize the size and boost performance. Impedance matching is better than -6 dB and the efficiency is between 60-90% within very wide bands up to 6 GHz. The proposed antenna design may enable further form-factor shrinking of 5G mobile devices.