Title :
Planar, compact ultra-wideband polarisation diversity antenna array
Author :
Khan, Muhammad Saeed ; Capobianco, Antonio-Daniele ; Naqvi, Aftab ; Ijaz, Bilal ; Asif, Sajid ; Braaten, Benjamin D.
Author_Institution :
Dipt. di Ing. dell´Inf., Univ. of Padova, Padua, Italy
Abstract :
A new compact multiple-input multiple-output (MIMO) ultra-wideband (UWB) antenna array is presented. The antenna array initially consisted of two monopoles placed side by side at a distance of 4 mm. A strong mutual coupling was observed so the design was modified by rotating the second radiator at 90° at a distance of 1 mm. Wideband isolation is achieved by exploiting polarisation diversity of antenna elements. Simulation in HFSS and printed prototype results validate the high isolation, over 21 dB on the entire 2.5-12 GHz frequency range. A prototype was fabricated on a low loss substrate of Rogers TMM4 measuring 23 × 39.8 mm2. To evaluate the diversity performance, the envelope correlation coefficient was calculated resulting below -20 dB, thus ensuring good diversity performance. The compactness of the proposed UWB-MIMO design is finally compared against alternative solutions already present in the literature.
Keywords :
HF radio propagation; MIMO communication; correlation theory; diversity reception; electromagnetic wave polarisation; planar antenna arrays; ultra wideband antennas; HFSS; Rogers TMM4; compact MIMO ultra wideband polarisation diversity antenna array; envelope correlation coefficient; frequency 2.5 GHz to 12 GHz; low loss substrate; multiple input multiple output; mutual coupling; planar antenna array; printed prototype; wideband isolation;
Journal_Title :
Microwaves, Antennas Propagation, IET
DOI :
10.1049/iet-map.2015.0371