Isolation Improvement in MIMO Dielectric Resonator Antennas

Elahi, Manzoor; Altaf, Amir; Yousaf, Jawad; Majali, Eqab Rateb Al

doi:10.1109/aps/ursi47566.2021.9704396

Cited by 4 publications

(7 citation statements)

References 4 publications

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“…Similarly, EBG, DGS and AMC structures are adapted in [6], [8] and [10] that increase the footprint of the antenna system. Other simple techniques that are proposed in [18][19][20][21] effectively reduce the coupling in MIMO DRA without increasing the footprint or height of the antenna. In [18], the metal strips are printed on the top surface of the DRA, whereas high-order modes in DRA elements are utilized to increase the isolation level is presented in [19].…”

Section: Egmentioning

confidence: 99%

“…Unlikely [18], the strips are printed on the lateral walls of the DRA that are shorted with the ground is presented in [20], however, multiple strips are printed on the two adjacent surfaces as well as the farther edges of the MIMO DRA elements is proposed in [21]. Finally, the proposed technique is very simple that comprises a closed metallic loop printed on the edges of the adjacent walls of the DRA elements.…”

Section: Egmentioning

confidence: 99%

“…The designs in [18] and [19] are simple and have almost same measured isolation performance, however, the E-E separation is larger between the elements. The designs presented in [20] and [21] provide simulation results on DRA mutual coupling reduction. An isolation of 28 dB is obtained in [20] with the E-E distance of 0.005λ 0 .…”

Section: Egmentioning

confidence: 99%

“…This method is based on the excitation of the high order modes in the DRA that are unable to reach the feeding port. In [20], a MIMO DRA with an isolation level of 25 dB at 15 GHz is reported by using the metallic strips on the lateral walls of the DRA elements. The isolation mechanism is very simple and compact.…”

Section: Introductionmentioning

confidence: 99%

“…The proposed technique is based on the use of closed metallic loops printed on the adjacent edges of the two DRAs in such a way that makes them shorted to the ground. This technique is very simple like [18] and [20] and does not need an extra footprint or increase the height of the MIMO DRA. The significant feature of the proposed isolation technique is that the overall design is very compact, i.e., the interelement distance is g = 1mm = 0.016 λ 0 while it provides a very good isolation performance as low as 50 dB.…”

Section: Introductionmentioning

confidence: 99%

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Mutual Coupling Reduction in Closely Spaced MIMO Dielectric Resonator Antenna in H-Plane Using Closed Metallic Loop

et al. 2022

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In this study, the mutual coupling in multiple-input-multiple-output (MIMO) dielectric resonator antenna (DRA) is reduced by employing closed metallic loops. The loops are wrapped around the adjacent edges of the dielectric resonators (DR) where magnetic coupling is significant. The proposed method employs only the conductive metallic strips for mutual coupling reduction and this makes the entire design very simple and compact. The impedance bandwidth varies from 4.73 to 5.1 GHz, covering the Sub-6 GHz 5G band. The realized MIMO DRA has an isolation of 28 dB at the resonant frequency with a measured peak gain at each port of 3.5 dBi and a peak radiation efficiency of 93%. The obtained measured results yield a low correlation coefficient (<0.05) mostly at the entire band that contribute to diversity gain (> 9.8 dB) to increase the capacity of communication system, is reported in this paper. The proposed antenna was fabricated and the closed loop strip is wrapped around using in house facility. Furthermore, some issues related to the fabrications tolerance have been investigated to justify the difference between some simulated and measured results.INDEX TERMS Dielectric resonator antenna, multiple input multiple output, isolation, envelope correlation coefficient, mean effective gain, quality factor, eigenmode analysis.

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Section: Egmentioning

confidence: 99%

Section: Egmentioning

confidence: 99%

Section: Egmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Mutual Coupling Reduction in Closely Spaced MIMO Dielectric Resonator Antenna in H-Plane Using Closed Metallic Loop

et al. 2022

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Performance prediction of dielectric resonator based mm-wave MIMO antenna using machine learning algorithm

Sikandar,

Katiyar,

Gangwar

et al. 2024

Eng. Res. Express

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The alumina ceramic-based dual port radiator is structured and analyzed in this communication. Cylindrical-shaped ceramic is fed by using modified circular aperture. The designed aperture creates dual orthogonal modes i.e. 〖HEM〗_11δ^x and 〖HEM〗_11δ^ymode inside the ceramic with 900 phase shifts. This property generates circularly polarized waves from 27.6 GHz-28.4 GHz. Anti-parallel placements of antenna ports introduce the concept of space diversity and improve the isolation level by more than 25 dB. To reduce the computational time, two machine learning algorithms i.e. Random Forest and XGBoost are utilized to predict the reflection coefficient variation. Testing of a fabricated prototype of the proposed radiating structure confirms that the designed radiator works well between 26.8 GHz-28.7 GHz. Asymmetrical placement of ports concerning substrate tilts the radiation pattern obtained from different ports in different directions i.e. ±300. Stable radiation features and good diversity performance make the designed antenna suitable for mm-wave 5G communication system.

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Isolation and Bandwidth Enhancement in Compact CP MIMO DRA in H-Plane Using Z-Shaped Strip

Elahi

Joung

Lim

2023

Antennas Wirel. Propag. Lett.

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Isolation Improvement in MIMO Dielectric Resonator Antennas

Cited by 4 publications

References 4 publications

Mutual Coupling Reduction in Closely Spaced MIMO Dielectric Resonator Antenna in H-Plane Using Closed Metallic Loop

Mutual Coupling Reduction in Closely Spaced MIMO Dielectric Resonator Antenna in H-Plane Using Closed Metallic Loop

Performance prediction of dielectric resonator based mm-wave MIMO antenna using machine learning algorithm

Isolation and Bandwidth Enhancement in Compact CP MIMO DRA in H-Plane Using Z-Shaped Strip

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