A compact four-port UWB MIMO antenna with connected ground and wide axial ratio bandwidth

Kumar, Sachin; Lee, Gwan Hui; Kim, Donghwi; Mohyuddin, Wahab; Choi, Hyun Chul; Kim, Kang Wook

doi:10.1017/s1759078719000874

Cited by 39 publications

(27 citation statements)

References 37 publications

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“…1. The proposed antenna covers multiple bands, including UWB, whereas other antennas reported in the literature [38][39][40][41][42][43][44][45][46][47][48][49][50][51][52][53] operate on a single wideband frequency. 2.…”

Section: On-car Scenariomentioning

confidence: 99%

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Quad-Port Multiservice Diversity Antenna for Automotive Applications

Kannappan

Palaniswamy

Wang

et al. 2021

Sensors

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A quad-element multiple-input-multiple-output (MIMO) antenna with ultra-wideband (UWB) performance is presented in this paper. The MIMO antenna consists of four orthogonally arranged microstrip line-fed hexagonal monopole radiators and a modified ground plane. In addition, E-shaped and G-shaped stubs are added to the radiator to achieve additional resonances at 1.5 GHz and 2.45 GHz. The reliability of the antenna in the automotive environment is investigated, with housing effects taken into account. The housing effects show that the antenna performs consistently even in the presence of a large metal object. The proposed MIMO antenna has potential for various automotive applications, including vehicle-to-vehicle (V2V), vehicle-to-infrastructure (V2I), vehicle-to-everything (V2X), intelligent transport system (ITS), automatic vehicle identifier, and RFID-based electronic toll collection.

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Section: On-car Scenariomentioning

confidence: 99%

“…2. The proposed antenna requires less space than the antenna configurations reported in [39][40][41][42][44][45][46][47][48][49][50][51][52][53][54][55]. 3.…”

Section: On-car Scenariomentioning

confidence: 99%

Quad-Port Multiservice Diversity Antenna for Automotive Applications

Kannappan

Palaniswamy

Wang

et al. 2021

Sensors

Self Cite

View full text Add to dashboard Cite

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“…However, it is quite difficult to retain circular polarization behavior of the antenna elements in the ground radiating CP MIMO structures when the ground patches are connected together. This is due to the fact that the connecting strip is made up of conductor, and, therefore, it will leak some amount of current toward the neighboring antenna elements [65]. To avoid this effect the antenna is thus loaded with MTM structure.…”

Section: Mavamentioning

confidence: 99%

Wearable Metamaterial Dual-Polarized High Isolation UWB MIMO Vivaldi Antenna for 5G and Satellite Communications

et al. 2021

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A low-profile Multiple Input Multiple Output (MIMO) antenna showing dual polarization, low mutual coupling, and acceptable diversity gain is presented by this paper. The antenna introduces the requirements of fifth generation (5G) and the satellite communications. A horizontally (4.8–31 GHz) and vertically polarized (7.6–37 GHz) modified antipodal Vivaldi antennas are simulated, fabricated, and integrated, and then their characteristics are examined. An ultra-wideband (UWB) at working bandwidths of 3.7–3.85 GHz and 5–40 GHz are achieved. Low mutual coupling of less than −22 dB is achieved after loading the antenna with cross-curves, staircase meander line, and integration of the metamaterial elements. The antennas are designed on a denim textile substrate with = 1.4 and h= 0.5 mm. A conductive textile called ShieldIt is utilized as conductor with conductivity of 1.8 × 104. After optimizing the proposed UWB-MIMO antenna’s characteristics, it is increased to four elements positioned at the four corners of a denim textile substrate to be employed as a UWB-MIMO antenna for handset communications, 5G, Ka and Ku band, and satellite communications (X-band). The proposed eight port UWB-MIMO antenna has a maximum gain of 10.7 dBi, 98% radiation efficiency, less than 0.01 ECC, and acceptable diversity gain. Afterwards, the eight-ports antenna performance is examined on a simulated real voxel hand and chest. Then, it is evaluated and compared on physical hand and chest of body. Evidently, the simulated and measured results show good agreement between them. The proposed UWB-MIMO antenna offers a compact and flexible design, which is suitably wearable for 5G and satellite communications applications.

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“…Therefore, techniques like polarization/pattern diversity were used to reduce far-field correlation without any increase in the antenna size [ 8 , 9 ]. The polarization diversity not only decreases the inter-element coupling, but also offers superior antenna performance by improving diversity gain and channel capacity [ 10 , 11 ].…”

Section: Introductionmentioning

confidence: 99%

Dual Circularly Polarized Planar Four-Port MIMO Antenna with Wide Axial-Ratio Bandwidth

Kumar

Lee

Kim

et al. 2020

Sensors

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A broadband compact-sized planar four-port multiple-input–multiple-output (MIMO) antenna with polarization diversity is presented. The proposed dual circularly polarized (CP) MIMO antenna consists of four G-shaped monopole elements, two of which are left-hand CP and the other two are right-hand CP. A vertical line strip in the G-shaped radiating element acts in balancing the vertical and horizontal electric field components to obtain 90° phase difference between them for circular polarization. Also, an I-shaped strip is incorporated between the ground planes of the G-shaped antenna elements to obtain equal voltage level in the proposed MIMO configuration. The dual circular polarization mechanism of the proposed MIMO/diversity antenna is analysed from the vector current distributions. The impedance bandwidth (S11 ≤ –10 dB) of the MIMO antenna is 105.9% (4–13 GHz) and the 3 dB axial ratio bandwidth (ARBW) is 67.7% (4.2–8.5 GHz), which is suitable for C-band applications. The overall size of the MIMO antenna is 70 × 68 × 1.6 mm3, and the minimum isolation between the resonating elements is 18 dB. The envelope correlation coefficient is less than 0.25, and the peak gain within the resonating band is 6.4 dBi.

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A compact four-port UWB MIMO antenna with connected ground and wide axial ratio bandwidth

Cited by 39 publications

References 37 publications

Quad-Port Multiservice Diversity Antenna for Automotive Applications

Quad-Port Multiservice Diversity Antenna for Automotive Applications

Wearable Metamaterial Dual-Polarized High Isolation UWB MIMO Vivaldi Antenna for 5G and Satellite Communications

Dual Circularly Polarized Planar Four-Port MIMO Antenna with Wide Axial-Ratio Bandwidth

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