Modified circular common element four‐port multiple‐input‐multiple‐output antenna using diagonal parasitic element. Issue 2 (1st September 2018)

• Record Type: Journal Article
• Authors: Chouhan, Sanjay; Panda, Debendra Kumar; Kushwah, Vivek Singh
• Is Part Of: International journal of RF and microwave computer-aided engineering. Volume 29:Issue 2(2019)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2018-09-01
• Subjects: common element antenna -- envelop correlation coefficient -- isolation -- mean effective gain -- multiple‐input‐multiple‐output -- Wi‐Fi applications; Microwave devices -- Computer-aided design -- Periodicals; Computer-aided engineering -- Periodicals; 621.3813
• DOI: 10.1002/mmce.21527
• Languages: English
• ISSNs: 1096-4290

Abstract

Abstract: A four‐port multiple input multiple‐output (MIMO) antenna with common radiating element is proposed for 2.4 GHz Wi‐Fi applications. It comprises a modified circular radiator fed by four identical modified feedlines, partial ground planes, and a diagonal parasitic element (DPE). The parasitic element is used to enhance the interport isolation. The antenna has a 2:1 Voltage standing wave ratio (VSWR) impedance band 2.34‐2.56 GHz and nearly omnidirectional radiation patterns. The radiation efficiency is more than 79% and gain is 2 dBi at resonant 2.43 GHz. The isolation in the given frequency band is 10 dB. At the 2.43 GHz, the isolation between adjacent ports (1, 2 and 1, 4) is 14 dB and between opposite ports (1, 3) is 12 dB. The mean effective gain (MEG) ≤ −2.7 dB and envelope correlation coefficient is <0.01. The −10 dB total active reflection coefficient bandwidth is 202 MHz. The antenna is designed for a Wi‐Fi device and the effectiveness of antenna has been checked for distance of ½ feet from the human head. The specific absorption rate (SAR) is found to be ≤0.17 W/Kg by CST simulation tool.