Easily extendable four port MIMO antenna with improved isolation and wide bandwidth for THz applications

A novel compact planar 2 × 2 antenna system with super-wide bandwidth is presented in this paper. The MIMO antenna has four square-shaped patches with two slots in each that are interconnected with each other using four strip lines printed on a substrate of Rogers Duroid RT 5880 with relative permittivity of εr = 2.2 and tangent loss of δ = 0.0009. The proposed antenna system has a partial ground plane with two enhancement fractured slots. The design is characterized by a super-wide impedance starting from 15.2 to 62 GHz (a bandwidth of 46.8 GHz) and compact total system size of 11.2 × 15.25 mm2 with a thickness of 0.12 mm. The proposed MIMO design has omnidirectional radiation pattern for far field and the achieved peak gain reaches 13.5 dBi. The presented planar antenna which relies on computer aided design, has been designed and simulated using an industrial standard simulation code. Its performance results showed that the MIMO design is characterized by super wide bandwidth, omnidirectional radiation pattern, and high-power gain with miniaturized physical size; thus, it is suitable for radio-frequency identification (RFID) systems, fifth-generation applications, ultra-wideband systems, and others.

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Fractal loaded planar super wide band four element MIMO antenna for THz applications

Nano Communication Networks ◽

10.1016/j.nancom.2021.100374 ◽

2021 ◽

pp. 100374

Author(s):

Swarup Das ◽

Debasis Mitra ◽

Sekhar Ranjan Bhadra Chaudhuri

Keyword(s):

Wide Band ◽

Mimo Antenna ◽

Thz Applications

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A Novel High Gain Wideband MIMO Antenna for 5G Millimeter Wave Applications

Electronics ◽

10.3390/electronics9061031 ◽

2020 ◽

Vol 9 (6) ◽

pp. 1031 ◽

Cited By ~ 3

Author(s):

Daniyal Ali Sehrai ◽

Mujeeb Abdullah ◽

Ahsan Altaf ◽

Saad Hassan Kiani ◽

Fazal Muhammad ◽

...

Keyword(s):

Millimeter Wave ◽

Performance Metrics ◽

Wave Spectrum ◽

High Gain ◽

Antenna System ◽

Impedance Bandwidth ◽

Total Efficiency ◽

Wide Bandwidth ◽

Mimo Antenna ◽

Radiating Element

A compact tree shape planar quad element Multiple Input Multiple Output (MIMO) antenna bearing a wide bandwidth for 5G communication operating in the millimeter-wave spectrum is proposed. The radiating element of the proposed design contains four different arcs to achieve the wide bandwidth response. Each radiating element is backed by a 1.57 mm thicker Rogers-5880 substrate material, having a loss tangent and relative dielectric constant of 0.0009 and 2.2, respectively. The measured impedance bandwidth of the proposed quad element MIMO antenna system based on 10 dB criterion is from 23 GHz to 40 GHz with a port isolation of greater than 20 dB. The measured radiation patterns are presented at 28 GHz, 33 GHz and 38 GHz with a maximum total gain of 10.58, 8.87 and 11.45 dB, respectively. The high gain of the proposed antenna further helps to overcome the atmospheric attenuations faced by the higher frequencies. In addition, the measured total efficiency of the proposed MIMO antenna is observed above 70% for the millimeter wave frequencies. Furthermore, the MIMO key performance metrics such as Mean Effective Gain (MEG) and Envelope Correlation Coefficient (ECC) are analyzed and found to conform to the required standard of MEG < 3 dB and ECC < 0.5. A prototype of the proposed quad element MIMO antenna system is fabricated and measured. The experimental results validate the simulation design process conducted with Computer Simulation Technology (CST) software.

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