Offset planar MIMO antenna for omnidirectional radiation patterns

Malviya, Leeladhar; Kartikeyan, M. V.; Panigrahi, Rajib Kumar

doi:10.1002/mmce.21274

Cited by 31 publications

(14 citation statements)

References 18 publications

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“…Reference [] has very high value of isolation but its size is very big, single band, and having two elements only. Reference [] has slightly lower bandwidth and higher area than the proposed design. Similarly, reference [] has single band and very big area for the four elements.…”

Section: Mimo Antenna Design and Experimental Resultsmentioning

confidence: 99%

“…These techniques have space utilization and pattern grooming capabilities . Offsetting in feed or patch may improve the diversity performance in terms of bandwidth and isolation . Similarly, the effect of diversity in choosing the shape of the radiating element may improve the performance parameters and direction of radiation pattern …”

Section: Introductionmentioning

confidence: 99%

“…[15][16][17] Offsetting in feed or patch may improve the diversity performance in terms of bandwidth and isolation. 18 Similarly, the effect of diversity in choosing the shape of the radiating element may improve the performance parameters and direction of radiation pattern. 19 In this article, a multi-standard, multi-band planar MIMO antenna with compact size radiators is proposed with the microstrip wave port to cover industrial, scientific, and medical (ISM) band, and 3.5 GHz frequency band, with more than 12.5 dB of isolation between ports.…”

Section: Introductionmentioning

confidence: 99%

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Multi-standard, multi-band planar multiple input multiple output antenna with diversity effects for wireless applications

Malviya

Kartikeyan

Panigrahi

2018

Int J RF Microw Comput Aided Eng

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Wireless generations require the miniaturized radiating elements for the portable devices. This research article presents a miniaturized multiple input multiple output (MIMO) antenna for IEEE 802.11 (WLAN) and IEEE 802.16 (WiMAX) wireless standards. The multi‐standard, multi‐band MIMO with 1 × 2 diversity arms is impedance matched with 50 Ω microstrip line on FR‐4 dielectric substrate having dielectric constant 4.4 and 1.524 mm thickness. The simple low profile design covers16.46% (2.23‐2.64 GHz) and 12.37% (3.26‐3.70 GHz) microwave frequency bands, with voltage standing wave ratio (VSWR) ≤ 2 achieves more than 12.5 dB of isolation between radiating ports. The proposed MIMO with inverted L shaped slot exhibits more than 73% efficiency, and more than 4 dBi gain at resonant frequencies. The presented MIMO is designed on FR‐4 dielectric substrate of size 45.1 × 90.2 mm2. The compact size of the radiating element is 6.7 × 6.7 mm2. The effect of radiations on the body has been evaluated using specific absorption rate (SAR) and found to be in safety limit.

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Section: Mimo Antenna Design and Experimental Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Multi-standard, multi-band planar multiple input multiple output antenna with diversity effects for wireless applications

Malviya

Kartikeyan

Panigrahi

2018

Int J RF Microw Comput Aided Eng

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“…Millimeter-wave (MMW) circuit integrated substrate waveguide feeds the antenna element. The frequency band of 22.5–32.0 GHz having VSWR <1.45 and gain between 8.2 and 9.6 dBi were achieved in the design [86].…”

Section: Introductionmentioning

confidence: 99%

5G multi-element/port antenna design for wireless applications:a review

Gupta

Malviya

Charhate

2019

Int. J. Microw. Wireless Technol.

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Fifth generation (5G) is the current hot topic of the world's leading telecommunication companies. The compact designs of antennas made it possible for them to resonate at higher frequencies, thus to enable the devices to attain higher data rate as compared to 4G technology. Data rate of 5G technology for low mobility users is expected to be 50.0 Gbps and for high mobility users it is 5.0 Gbps. On the other hand, International telecommunication union's objective for 5G is 3 times more spectrally efficient thanlong-term evolution (LTE). The paper has carried out meticulous study over the impact of 5G antennas on the size of antenna, size/type of substrate, gain, efficiency, and isolation, etc. Also, different arrays andmultiple input multiple outputs (MIMOs) with patch antenna, magneto electric-dipole, microstrip grid array antenna, folded dipole, series-fed array, connected antenna array, MIMO are studied. The paper also includes the existing technology i.e 4G LTE and their isolation enhancement approaches. Many of the designs used the reflector plates to reduce the back lobe radiation problem in MIMO/array antennas to increase front-to-back ratio. The gain in 5G antennas can be increased by using balun, parasitic element as directors, multiple notch structures, three identical slot sub-arrays, etc. Mathematical equations of multi-element/port antennas are included to model the designed antennas. The beam steering is also included for the 5G technology in this paper.

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“…Some other meander line based antenna with meandered feeding lines [10], MIMO antenna with dual band meander line [11], and meander line frequency selective surface [12] etc., are used with folding for compactness. Some UWB [13], circularly polarized [14], offset planner antenna [15], and terahertz antenna [16] are used for isolation enhancement.…”

Section: Introductionmentioning

confidence: 99%

Two element folded meander line MIMO antenna for Wireless applications

Chouhan¹,

Malviya²

2019

ELS

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Compact antenna, appropriate gain, high efficiency, wide bandwidth, minimum envelope correlation coefficient (ECC), large total active reflection coefficient (TARC) bandwidth, and low specific absorption rate (SAR) are certain conditions set on the present/future generations of wireless communication antennas with the lowest cost of implementation. A compact low profile folded MIMO antenna has been designed using CST tool to cover application at 5.2 GHz. The reported folded MIMO antenna has bandwidth of 600 MHz (5.0-5.6 GHz) and has fractional bandwidth of 11.32 % along with the compact size of 37.5 × 17.0 mm2 . The reported MIMO antenna has ECC of < 10-2. The proposed folded MIMO antenna resonates at 5.2 GHz and has return loss of -44.0 dB. The inter-port isolation in antenna ports is > 11.50 dB in the defined frequency band. The response of TARC shows > 580 MHz of bandwidth with pair of excitation angles at antenna ports. The gain of antenna is > 3.0 dBi in the operating band. The reported radiating geometry makes the design very compact. To check the radiation effect on human body in different positions, the SAR is evaluated for indoor environment.

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Offset planar MIMO antenna for omnidirectional radiation patterns

Cited by 31 publications

References 18 publications

Multi-standard, multi-band planar multiple input multiple output antenna with diversity effects for wireless applications

Multi-standard, multi-band planar multiple input multiple output antenna with diversity effects for wireless applications

5G multi-element/port antenna design for wireless applications:a review

Two element folded meander line MIMO antenna for Wireless applications

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