A compact planar dual band two‐port
            <scp>MIMO</scp>
            antenna with high isolation and efficiency

Dong, Guiting; Huang, Jianlin; Chen, Zhizhou; Liu, Gui

doi:10.1002/mmce.23245

Cited by 8 publications

(5 citation statements)

References 19 publications

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“…A Meta surface-based decoupling method is suggested in [25] to reduce the mutual couplings between the patches operating at two separate bands. A MIMO antenna consisting of a tilting square loop with a U-slot embedded in the defected ground is reported in [26]. Moreover, in a U-shaped slot, a rectangular metallic patch is fitted to achieve good isolation.…”

Section: Introductionmentioning

confidence: 99%

Circumferential slots based decoupled wideband MIMO antenna for 5G and sub-6 GHz applications

Sharma,

Tiwari,

Singh

2024

Phys. Scr.

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This paper investigates a small size 2×2 wideband multiple input multiple output (MIMO) antenna covering frequency band of 2.61 to 5.52 GHz. The antenna structure consists of elliptical ring patch with multiple circumferential slots. The edge-to-edge separation between the patches are kept 3.6 mm with volumetric dimensions of 30×46×1.6 mm3. The narrow slits are etched in the tapered ground plane to obtain the wideband characteristics. The electromagnetic coupling is improved more than 16 dB by employing the neutralization technique. The measured average gain and radiation efficiency of the proposed antenna are above 2.61dBi and 83.54%, respectively across the operating band. In addition to that, the important MIMO diversity parameters are investigated. The group delay and signal analysis in different orientations are also studied to ensure the quality performance of the antenna. The proposed MIMO antenna is simulated using CST microwave studio and further validated with the measurements. In addition to that, the parallel and orthogonal configuration of 4×4 MIMO antennas are analyzed by extending the proposed 2×2 MIMO design. The 4-port MIMO antennas exhibit the operating frequency bands varying from 2.80 to 5.58 GHz and 3.4 to 5.52 GHz, respectively for parallel and orthogonal MIMO configurations. The diversity parameters of 4-port MIMO antennas are calculated and compared with the measured results to verify its practical applications. Finaly, the SAR analysis of the antenna is presented at 3.08 and 5.20 GHz for 1/10 g tissues and are found 0.111/0.106 and 0.079/0.063 W/Kg, respectively. The proposed MIMO antenna designs are suitable for modern high-speed communication for 5G and sub-6 GHz frequency bands.

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Section: Introductionmentioning

confidence: 99%

Circumferential slots based decoupled wideband MIMO antenna for 5G and sub-6 GHz applications

Sharma,

Tiwari,

Singh

2024

Phys. Scr.

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“…The progression of research works on the DGSs in RF and microwave for the last 10 years have shown evidences of improvement towards design realizations and performances. DGS has several advantages on the circuit [12], unwanted frequency suppression [13]- [15], bandwidth enhancement of antennas [16], [17], size compactness [18], [19], high power handling capability [20], isolation in antenna designs [21]- [23], and compensating parasitic capacitance of switching element to improve isolation [24], [25].…”

Section: Introductionmentioning

confidence: 99%

High isolation of SPDT PIN diode switch using switchable dumbbell-shaped DGS in millimeter wave 28 GHz band

Mohd Yasin,

Shairi,

Othman

et al. 2023

Bulletin EEI

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This paper proposes a high isolation of single pole double throw (SPDT) PIN diode switch using switchable dumbbell-shaped defected ground structure (DGS). The proposed SPDT switch was designed for radio frequency (RF) front-end transceiver of antenna array multiple input multiple output (MIMO) in millimeter wave 28 GHz band. The switchable dumbbell-shaped DGS can be switched between allpass and bandstop responses where the bandstop response of the DGS can be utilized as a high isolation in the SPDT PIN diode switch circuit. A simple mathematical analysis is explained in this paper for the bandstop and allpass responses of the switchable dumbbell-shaped DGS. The propose SPDT switch was designed based on Roger RT/Duroid 5880 with 0.254 mm thickness and relative dielectric constant of 2.2. The simulated result showed that the proposed SPDT PIN diode switch produced an isolation of 36.36 dB at 27.3 GHz (center of 28 GHz band), which was 63% higher than the conventional SPDT design.

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“…Multiple input-multiple output (MIMO) technology possesses promising application prospects in improving the data rate. Recently, many sub-6 GHz 5G smartphone MIMO antennas have been developed [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16], such as four-element MIMO antennas [2][3][4][5], eight-port smartphone antennas [6][7][8][9][10], and even twelve-element MIMO antennas [11,12]. One nonnegligible challenge encountered during the design process is the method to effectively weaken the mutual electromagnetic coupling between antenna elements in a MIMO antenna array.…”

Section: Introductionmentioning

confidence: 99%

“…One nonnegligible challenge encountered during the design process is the method to effectively weaken the mutual electromagnetic coupling between antenna elements in a MIMO antenna array. However, numerous decoupling mechanisms have been put forward, such as polarization diversity [9], defected ground structure (DGS) [12,13], decoupling branches [14], neutralization lines [15], and orthogonal mode [16]. More attention still needs to be focused on the decoupling design in the MIMO antenna array.…”

Section: Introductionmentioning

confidence: 99%

A Dual-Band Eight-Element MIMO Antenna Array for Future Ultrathin Mobile Terminals

et al. 2022

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An ultrathin dual-band eight-element multiple input–multiple output (MIMO) antenna operating in fifth-generation (5G) 3.4–3.6 GHz and 4.8–5 GHz frequency bands for future ultrathin smartphones is proposed in this paper. The size of a single antenna unit is 9 × 4.2 mm2 (0.105 λ × 0.05 λ, λ equals the free-space wavelength of 3.5 GHz). Eight antenna units are structured symmetrically along with two sideboards. Two decoupling branches (DB1 and DB2) are employed to weaken the mutual coupling between Ant. 1 and Ant. 2 and between Ant. 2 and Ant. 3, respectively. The measured −10 dB impedance bands are 3.38–3.82 GHz and 4.75–5.13 GHz, which can entirely contain the desired bands. Measured isolation larger than 14.5 dB and 15 dB is obtained in the first and second resonant modes, respectively. Remarkable consistency between the simulated and measured results can be achieved. Several indicators, such as the envelope correlation coefficient (ECC), diversity gain (DG), total active reflection coefficient (TARC), and multiplexing efficiency (ME), have been presented to assess the MIMO performance of the designed antenna.

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A compact planar dual band two‐port MIMO antenna with high isolation and efficiency

Cited by 8 publications

References 19 publications

Circumferential slots based decoupled wideband MIMO antenna for 5G and sub-6 GHz applications

Circumferential slots based decoupled wideband MIMO antenna for 5G and sub-6 GHz applications

High isolation of SPDT PIN diode switch using switchable dumbbell-shaped DGS in millimeter wave 28 GHz band

A Dual-Band Eight-Element MIMO Antenna Array for Future Ultrathin Mobile Terminals

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