Travelling Wave Antenna Based MIMO for 5GHz WLAN Band Application With Pattern Diversity. Issue 12 (2nd December 2022)

• Record Type: Journal Article
• Authors: Sharma, Vinay; Upadhayay, Madhur Deo; Singh, Atul Vir
• Is Part Of: International journal of electronics. Volume 109:Issue 12(2022)
• Page Start: 2035
• Page End: 2052
• Publication Date: 2022-12-02
• Subjects: Frequency scanning -- pattern diversity -- dual polarisation -- WLAN; Electronics -- Periodicals; Electronic control -- Periodicals; 621.381
• DOI: 10.1080/00207217.2021.2001867
• Languages: English
• ISSNs: 0020-7217

Abstract

ABSTRACT: A single-layer, four-element multiple-input-multiple-output (MIMO) antenna for 5 GHz (5150–5850 MHz) band WLAN application is proposed. Each unit element consists of three sections and this behaves as a travelling wave antenna, which enables frequency scanning feature. The combination of orthogonal feeds and placement of elements introduce dual-polarisation, and pattern diversity respectively. Thus, the proposed MIMO antenna offers a higher degree of freedom (pattern diversity, frequency scanning and dual polarisation), which makes it exceptional. The proposed MIMO antenna has a maximum impedance bandwidth of 17% (4.93–5.87 GHz) corresponding to port 4 and isolation of 17.5 dB, which is achieved without additional decoupling/isolation enhancement circuits. The envelope correlation coefficient of 0.25, capacity loss less than 0.4 bits/sec/Hz, and the mean effective gain (MEG) ratio of 0 dB in the desired frequency band quantifies the diversity performance for WLAN applications. The proposed MIMO has gain from 2 to 5.5 dB and occupies a compact volume of 1.3 λ × 1.3 λ × 0.02 λ mm 3, which may be one of the most miniaturised electrical configurations.