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Omnidirectional Microstrip MIMO Antenna for Intelligent Vehicle RADAR Communication

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Wireless Personal Communications Aims and scope Submit manuscript

A Correction to this article was published on 24 November 2022

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Abstract

The Multiple Input Multiple Output (MIMO) antenna was developed to enhance many wireless communications with the diverse range of antenna elements. Multiple antennas focus energy into smaller regions of space with improved directional gain and radiation efficiency. Omnidirectional antenna achieves radiation in all directions. This paper has proposed a compact micro-strip circular patch antenna, which operates at 5.8 GHz in C-band for Intelligent Vehicle RADAR (IV RADAR) application. This antenna adopted FR4 as substrate, which has relative permittivity, εr = 4.4 and dielectric tangent loss, δ = 0.02. A compact high gain 4 × 4 MIMO circular patch antenna with inset feed has been designed and simulated. Sixteen (4 × 4) circular patch elements have been arranged with 0.5 λo spacing between the consecutive patches in x–y plane. Each circular patch radius is 0.1446 λo and substrate dimension is 3.4800 λo × 2.5133 λo ×  0.0309 λo \(\uplambda\) \(\uplambda\). The circular patch array antenna was designed and simulated with a combination of inset and corporate feed. The simulated results provide average return loss of − 27.46 dB at 5.8 GHz with realized gain of 11.25 dBi and directivity of 15.80 dB. The Bandwidth of 470 MHz was observed in inset feed method. In order to achieve the omnidirectional radiation pattern, six substrates of dimension 1.546 λo × 1.546 λo ×  0.0309 λo were arranged in cuboid shape. Four (2 × 2) circular patches with radius 0.1446 λo each and 0.5 λo spacing between them excited with inset feed have been designed on each substrate. Twenty-four microstrip circular patches were arranged in cuboid shape to achieve high omnidirectional gain. In the corporate feed, a quarter wave transformer is employed for impedance matching. Six combinations of inset and corporate feed excite the combination of four (2 × 2) circular patch antennas on each surface of cuboid. The simulated results provide average return loss of about − 19.56 dB at 5.83 GHz; realized gain of 8.20 dBi; directivity of 15.86 dB and 197 MHz bandwidth in omni-direction. The proposed antenna demonstrably accomplishes antenna miniaturization as well as higher omnidirectional gain with a smaller patch radius. For possible applications in MIMO systems, the proposed configurations remain exceedingly compact. Finally, the low cast FR4 material is used for fabrication to reduce the overall system cost. The fabricated antenna had been tested for its radiation characteristics.

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Change history

  • 23 November 2022

    The original version of this article was revised: In this article the affiliation details for A. Rajeswari were incorrectly given as 'Department of Electronics and Communication Engineering, Government College of Technology, Coimbatore, India' but should have been 'Department of Electronics and Communication Engineering, Coimbatore Institute of Technology, Coimbatore, India'. The original article has been corrected.

  • 24 November 2022

    A Correction to this paper has been published: https://doi.org/10.1007/s11277-022-10117-1

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Authors and Affiliations

  1. Department of Electronics and Communication Engineering, Government College of Technology, Coimbatore, India

    Somasundaram Mathivanan

  2. Department of Electronics and Communication Engineering, Coimbatore Institute of Technology, Coimbatore, India

    A. Rajeswari

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  1. Somasundaram Mathivanan
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  2. A. Rajeswari
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Correspondence to Somasundaram Mathivanan.

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Mathivanan, S., Rajeswari, A. Omnidirectional Microstrip MIMO Antenna for Intelligent Vehicle RADAR Communication. Wireless Pers Commun 127, 3407–3421 (2022). https://doi.org/10.1007/s11277-022-09923-4

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