Design and Analysis of a Slotted MIMO-Based Antenna for WLAN Applications

Abstract

AbstractThis research presents a slotted MIMO antenna for improved isolation. The proposed antenna is designed on an FR-4 substrate with a dielectric constant of 4.4 and a height of 1.6 mm. The operating frequency is 5.4 GHz, which is useful for WLAN applications. Initially, a two-element MIMO is constructed without any isolation technique, but the desired antenna shows self-isolation with required values. After that an analysis was performed to enhance isolation. For further improvement, a parasitic element like a series of diamond-shaped structures is proposed. A further 2 × 2 meander line structures is proposed. The distance between the two radiating elements is 5 mm and is maintained for both the designs. For impedance matching, a quarter-wave feeding technique is proposed. As a result of the investigation, the meander line structure enhanced isolation by 7 dB while simultaneously achieving a low return loss. S-parameters, antenna radiation characteristics, envelope correlation coefficients (ECCs), and diversity gains are explored to evaluate the performance of the suggested MIMO antenna systems. The proposed antenna has a diversity gain (DG) of > 9 dB and ECC (envelope correlation coefficient) of 0.01. For the simulation, CSTMW 2018 was used. The proposed antenna has an overall dimension of 46 × 20 × 1.6 mm. There is a lot of evidence that MIMO with a meander line structure is a good choice for wide LAN applications.KeywordsSlottedMIMO antennaECCDGParasitic element