COMPACT FOUR-BAND CACTUS-SHAPED ANTENNA FOR 5G AND WLAN APPLICATIONS

Abstract

A low-profile coplanar waveguide fed four-band compact antenna for 5G and WLAN applications is presented in this letter. Multiple bands are generated using a cactus-shaped patch, which consists of several inverted L-shaped slots and branches. The proposed antenna provides 150 MHz (2.10 GHz–2.25 GHz), 400 MHz (3.25 GHz–3.65 GHz), 1022 MHz (4.42 GHz–5.44 GHz), 1400 MHz (5.60 GHz–7.00 GHz) bandwidths of 10 dB return loss, corresponding to the target N1/N78/N79 5G bands and 5.8 GHz WLAN band, respectively. Moreover, the proposed antenna has a low profile of 21mm × 29mm × 1.6 mm, while maintaining tolerable gain in these operation bands. In addition, monopole-like radiation patterns are obtained, which is suitable for wireless communication. In order to verify this design, a prototype has been fabricated and measured. The measured results show satisfactory agreement with the simulated ones.