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Compact Four-Port Circularly Polarized MIMO X-Band DRA.

Ahmed A Ibrahim1, Hijab Zahra2, Syed Muzahir Abbas2

  • 1Electronics and Communications Engineering Department, Minia University, El-Minia 61519, Egypt.

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Summary
This summary is machine-generated.

This study presents a compact four-port circularly polarized (CP) multi-input multi-output (MIMO) dielectric resonator antenna (DRA). The novel design enhances port isolation using a defected ground structure (DGS) for improved performance in X-band applications.

Keywords:
MIMOX-bandantennacircular polarizationdielectric resonator

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Area of Science:

  • Electrical Engineering
  • Electromagnetics
  • Antenna Theory

Background:

  • Circularly polarized (CP) antennas are crucial for mitigating polarization mismatch losses.
  • Multi-input multi-output (MIMO) systems enhance wireless communication capacity and reliability.
  • Dielectric resonator antennas (DRAs) offer advantages in terms of size and bandwidth.

Purpose of the Study:

  • To design and implement a compact four-port CP MIMO DRA.
  • To investigate the use of defected ground structures (DGS) for improved port isolation.
  • To evaluate the antenna's performance for X-band applications.

Main Methods:

  • A deformed dielectric resonator geometry was utilized for CP radiation.
  • Aperture-coupled feeding was employed to excite the DRA.
  • A defected ground structure (DGS) was integrated to enhance isolation while preserving phase differences between orthogonal modes.

Main Results:

  • The implemented antenna achieved a 10 dB impedance bandwidth of 38% (8.5-12.5 GHz) and a 3 dB axial ratio (AR) bandwidth of 9.32% (9.2-10.1 GHz).
  • A peak gain of approximately 6 dBi was observed in the CP radiation band.
  • MIMO performance parameters were within acceptable limits, indicating good isolation and correlation.

Conclusions:

  • The proposed compact four-port CP MIMO DRA with DGS offers a viable solution for advanced wireless communication systems.
  • The design effectively balances miniaturization, CP radiation, and high port isolation.
  • The antenna is well-suited for various X-band applications requiring efficient polarization diversity and spatial multiplexing.