Compact four‐port MIMO dielectric resonator antenna with pattern diversity. Issue 12 (26th July 2019)

• Record Type: Journal Article
• Authors: Varshney, Gaurav; Gotra, Shailza; Chaturvedi, Saumya; Pandey, Vinay S.; Yaduvanshi, Rajveer S.
• Is Part Of: IET microwaves, antennas & propagation. Volume 13:Issue 12(2019)
• Page Start: 2193
• Page End: 2198
• Publication Date: 2019-07-26
• Subjects: dielectric resonator antennas -- broadband antennas -- MIMO communication -- antenna radiation patterns; pattern diversity -- antenna structure -- cylindrical DR elements -- compact four‐port multiinput‐multioutput antenna -- dielectric resonator antenna -- compact four‐port MIMO antenna -- epsilon‐shaped DR elements -- orthogonal modes -- multidirectional coverage -- envelope correlation coefficient -- diversity gain -- single DR element; Microwaves -- Periodicals; Microwave antennas -- Periodicals; Antennas (Electronics) -- Periodicals; Radio wave propagation -- Periodicals; Microwave communication systems -- Periodicals; 621.381305
• DOI: 10.1049/iet-map.2018.5799
• Languages: English
• ISSNs: 1751-8725

Abstract

Abstract : A new compact four‐port multi‐input‐multi‐output (MIMO) dielectric resonator (DR) antenna is proposed with pattern diversity. The antenna contains four DR elements, the epsilon‐shaped and cylindrical. These four DR elements are placed together such that they resonate at the same frequency. The specific geometry of the DR elements allows to place them at separation which is much smaller than operating wavelength. Hence, the combination of the four DR elements acts as a single DR. This helps in maintaining the compactness of the antenna structure. The antenna operates with the hybrid of modes HE M 11 δ and T M 01 δ excited in epsilon‐shaped and cylindrical DR elements, respectively. The excitation of these orthogonal modes helps in obtaining the pattern diversity allowing the antenna for multi‐directional coverage. The antenna provides 15.73% overlapping 10 dB impedance bandwidth with the variation of gain within ranges 4–6 and 6–6.5 dBi at port 1/2 and port 3/4, respectively. In addition, the antenna provides the high radiation efficiency >93% at port 1/2 and 97% at port 3/4. Other parameters required for MIMO applications such as envelope correlation coefficient and diversity gain are within the acceptable limits.