Abstract
A wideband multiple-input-multiple-output (MIMO) antenna system with common elements suitable for SCADA wireless communication backhaul application which is operating frequency of 0.85-2.6GHz that can cover global system for mobile communication (GSM) 900MHz and 1.8GHz, The Universal Mobile Telecommunication System (UMTS) 2GHz, Wi-Fi (2.4GHz) and Long Term Evolution (LTE) 2.6GHz is proposed. The proposed MIMO antenna system consists of four microstrip feedline with common radiating element and a frame shaped ground plane. A single port antenna also was designed and presented in this paper to show the process to design wideband MIMO antenna structure. The radiator of the MIMO antenna system is designed as the shape of modified rectangle with straight line at each corner to enhance the bandwidth frequency. To improve the isolation between ports, the ground plane is modified by inserting four L-slots in each corner to reduce mutual coupling. For an antenna efficiency of more than 60%, the simulated reflection coefficients are below -10dB for all ports at expected frequency. Simulated isolation is achieved greater than -10dB by using a modified ground plane. Also, a low envelope correlation coefficient (ECC) less than 0.1 and polarization diversity gain of about 10dB with the orthogonal mode of linear polarization and omnidirectional pattern during the analysis of the radiation characteristic are achieved. Therefore, the proposed design can be used for SCADA wireless communication backhaul application.
Highlights
Supervisory Control and Data Acquisition (SCADA) systems are used in industrial and engineering applications to monitor and control distributed systems from master location
SCADA communication is intended to provide the means by which data can be transferred between master stations and Remote Terminal Units (RTUs)
RTUs communicate with master station using few types of communication via Remote Front End (RFE) [1]
Summary
Supervisory Control and Data Acquisition (SCADA) systems are used in industrial and engineering applications to monitor and control distributed systems from master location. GPRS is a packet oriented mobile data standard on 2G and 3G cellular communication network’s global system for mobile communication (GSM) and The Universal Mobile Telecommunication System (UMTS) respectively. This communication needs to be improved up to 4G/LTE since there always have intermittent wireless communication link between RTUs and master station. The proposed MIMO antenna system need to cover the frequency range up to LTE frequency band. The proposed MIMO antenna system consists symmetrical four port microstrip feedline, straight line on monopole patch antenna with single radiating edges and a frame shaped ground on ground plane.
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