CPW Fed Compact UWB 4-Element MIMO Antenna with High Isolation

Yin, Wenfei; Chen, Shaoxiang; Chang, Jie; Li, Chunhua; Khamas, S.K.

doi:10.3390/s21082688

Cited by 30 publications

(29 citation statements)

References 21 publications

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“…The multiplexing efficiency (η mux ) is defined as the signal-to-noise ratio between imperfect and an ideal MIMO antenna systems. Equation ( 11) demonstrates how η mux can be calculated [36].…”

Section: Multiplexing Efficiencymentioning

confidence: 99%

A Compact Dual Band MIMO Dielectric Resonator Antenna with Improved Performance for mm-Wave Applications

Alanazi

Khamas

2022

Sensors

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A compact multiple-input-multiple-output (MIMO) dielectric resonator antenna (DRA) that is suitable for internet of things (IoT) sensor networks is proposed with reduced coupling between elements. Two rectangular-shaped DRAs have been placed on the opposite sides of a Rogers substrate and each is fed using a coplanar waveguide (CPW) feed with slots etched in a dedicated metal ground plane that is located under the DRA. Moreover, locating the elements at the opposite sides of the substrate has improved the isolation by 27 dB without the need to incorporate additional complex structures, which has reduced the overall antenna size. Furthermore, a dual band operation is achieved since each antenna resonates at two frequencies: 28 GHz and 38 GHz with respective impedance matching bandwidths of 18% and 13%. As a result, the corresponding data rates are also increased independently. In addition to the advantages of improved isolation, compact size and dual band operation, the proposed configuration offers a diversity gain (DG), envelope correlation coefficient (ECC) and channel capacity loss (CCL) of 9.98 dB, 0.007, 0.06 bits/s/Hz over the desired bands, respectively. A prototype has been built with good agreement between simulated and measured results.

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Section: Multiplexing Efficiencymentioning

confidence: 99%

A Compact Dual Band MIMO Dielectric Resonator Antenna with Improved Performance for mm-Wave Applications

Alanazi

Khamas

2022

Sensors

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“…These techniques are, defected ground structure [9,10], decoupling network [11,12], space diversity [13], parasitic elements [14,15], neutralization rings [16], different stub and slots [17][18][19][20][21][22], shorting pins [23], metamaterials [24], and non-uniform transmission line using nonlinear model predictive to reduce mutual coupling [25].…”

Section: Introductionmentioning

confidence: 99%

“…Furthermore, to produce high isolation between MIMO antenna elements F-shaped stubs are introduced in the ground plane in [17], and a pair of L-shaped slots are introduced in the feed line for good agreements of isolation in [18]. In [19][20][21][22] high isolation is realized by using slotted stubs decoupling structure. The mutual coupling between antenna elements of the MIMO system is kept down by utilizing different types of metamaterials configurations [24].…”

Section: Introductionmentioning

confidence: 99%

Isolation and Gain Improvement of a Rectangular Notch UWB-MIMO Antenna

Abbas

Hussain

Sufian

et al. 2022

Sensors

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This paper presents the performance improvement of a co-planar waveguide rectangularly notched UWB-MIMO antenna. The isolation and gain of the antenna are enhanced by using a parasitic isolator. The antenna consists of four microstrip patch antennas and an isolator. The UWB characteristic of the antenna is achieved by truncating the lower ends of the radiating patch by a semicircle. The rectangular notch characteristic is obtained by adding two electromagnetic bandgap structures on the backside of the antenna, which is attached to the radiator via shorting pin. The performance, especially the decoupling of the MIMO antenna is improved by using a novel parasitic decoupler, which is placed between the antennas to receive uncorrelated signals. The decoupling structure consists of a square shape metallic element with a circular slot inside and a half-semicircle slot edged at each corner. Four rectangular metallic stubs are extended from opposite parallel sides to improve further isolation. The simulated and measured results show that the antenna has a rectangular notch band (5.25–5.85 GHz) across the working band of 3–12.8 GHz. In addition, the antenna has a planar structure with an overall size of 60 × 60 × 1.52 mm3 and offers stable gain, reduced mutual coupling (<−21 dB), and lower envelop correlation (<0.001).

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“…The associate editor coordinating the review of this manuscript and approving it for publication was Shah Nawaz Burokur . channel efficiency and increase data integrity, the multiple input multiple output (MIMO) system has been one of the most suitable and promising technology as it is well suited for high capacity, high data rate and high reliability requirements [2]. In addition, MIMO antenna system can alleviate the effect of multipath, conduct diversity gain and multiplexing efficiency [3].…”

Section: Introductionmentioning

confidence: 99%

SIGW Based MIMO Antenna for Satellite Down-Link Applications

et al. 2022

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In this paper, a 4-port multi-input multi-output (MIMO) antenna based on substrate integrated gap wave guide (SIGW) is presented for down-link satellite applications. The proposed MIMO antenna consists of four rectangular-shaped radiating slots, which are fed via SIGW to minimize dispersion and insertion loss. Firstly, single antenna element (reference antenna) is designed to have impedance matching and stable radiation pattern over the bandwidth 13.4-13.65 GHz. Afterward, different antenna configurations are studied to combine four identical elements of the reference one for the sake of minimizing mutual coupling between them. In this work, the edge-to-edge separation between the antenna elements for orthogonal and opposite orientations are 9.3mm and 17.3mm, respectively. The mutual coupling between antenna elements is suppressed by etching the upper ground in the region between the antenna elements. Moreover, further optimization is carried out by changing the dimensions of the etched slot to reach higher isolation between radiating slots for better MIMO diversity performance. With this approach, the realized gain is increased by 3-dBi and the maximum mutual coupling achieved at 13.5 GHz between port (1,2) and port (1,3) are -63 dB and -78 dB, respectively with isolation enhancement of 38 dB between port (1,2) and 48 dB between port (1,3). Both simulated and measured results indicate that the proposed antenna has a bandwidth of 13.3-13.8 GHz, with a high isolation greater than 40 dB. Furthermore, the realized antenna gain is around 9-dBi with radiation efficiency of 86%. In addition, the designed MIMO antenna offers excellent radiation characteristics and stable gain over the whole operating band. To explore the diversity of the MIMO system the envelope correlation coefficient (ECC), multiplexing efficiency (ME), diversity gain (DG), channel capacity loss (CCL) and total active reflection coefficient (TARC) are studied. Finally, good consistency between simulation and measured outcomes is obtained confirming the validity of the MIMO antenna for real life satellite application systems.INDEX TERMS MIMO antenna, SIGW, satellite downlink applications.

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CPW Fed Compact UWB 4-Element MIMO Antenna with High Isolation

Cited by 30 publications

References 21 publications

A Compact Dual Band MIMO Dielectric Resonator Antenna with Improved Performance for mm-Wave Applications

A Compact Dual Band MIMO Dielectric Resonator Antenna with Improved Performance for mm-Wave Applications

Isolation and Gain Improvement of a Rectangular Notch UWB-MIMO Antenna

SIGW Based MIMO Antenna for Satellite Down-Link Applications

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