Design of a folded UWB MIMO antenna for an on‐body application

Joo, Eunman; Kwon, Kyeol; Choi, Jaehoon

doi:10.1002/mop.28591

Cited by 4 publications

(14 citation statements)

References 8 publications

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“…The omnidirectional radiation pattern [20][21][22][23][24] obtained causes radiation exposure when tested on body tissues. From the aforementioned literature, the issues found are as follows: large antenna dimension , high profile [1,2,7,10,13,15,17], low gain and efficiency [18][19][20][21][22][23][24][27][28][29][30][31][32][33], and MIMO antenna elements providing omnidirectional radiation pattern [18][19][20][21][22][23][24][27][28][29][30][31][32] suitable only for on-body communication but it results in electromagnetic exposure as tested on the body. The proposed antenna design mitigates the above-mentioned issues by providing features such as low profile, better isolation, good radiation efficiency, and gain, and the pattern diversity providing diverse functions such as the omnidirectional and directional patterns on a single platform suitable for both on/ off-body communication respectively.…”

Section: Introductionmentioning

confidence: 99%

Compact ultra-wideband pattern diversity antenna for body-centric communications

Kanagasabai

Sambandam

Alsath³

2022

Int. J. Microw. Wireless Technol.

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This paper presents a pattern diversity UWB antenna for Wireless Body Area Network (WBAN) communications. Pattern diversity antenna comprises two antenna elements with directional and omnidirectional patterns suitable for off-body and on-body communications respectively. Several broad-banding techniques such as Co-Planar waveguide, parasitic patches, and cavity resonant techniques are incorporated in microstrip antenna to achieve an ultra-wideband of 7.5 GHz (3.1 to 10.6 GHz) with a directional pattern. Monopole radiator topology is utilized to achieve a UWB frequency range of 2.6–10.6 GHz with an omnidirectional pattern. Pattern diversity is achieved using an orthogonal arrangement of the antenna elements in a compact size of 40 mm × 34 mm, maintaining the isolation >20 dB between the antennas. Gain varies from 2.2 to 4.6 dBi and 2.5 to 7.5 dBi for omnidirectional and directional antenna respectively. The simulated radiation efficiency for the directional antenna and the omnidirectional antenna are 74–86% and 52–66.5% respectively. The proposed design provides a good diversity performance in the entire UWB bandwidth with ECC<0.1 and a diversity gain of approximately 10 dB. SAR impact evaluated under various conditions is found to be <1.6 W/Kg for 1 gram of tissue.

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Section: Introductionmentioning

confidence: 99%

Compact ultra-wideband pattern diversity antenna for body-centric communications

Kanagasabai

Sambandam

Alsath³

2022

Int. J. Microw. Wireless Technol.

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“…In the past few years, lots of MIMO antennas have been designed for S -band application and human interfaces devices. The effect of human body on the MIMO antenna parameters in near-field region was discussed and analyzed [25]. The various antennas [26–29] were designed with octagonal-shaped geometry, which covers wideband and UWB applications with isolation of at least −10 dB.…”

Section: Introductionmentioning

confidence: 99%

Octagonal-shaped wideband MIMO antenna for human interface device and S-band application

Chouhan

Panda

Kushwah

et al. 2018

Int. J. Microw. Wireless Technol.

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A four-element wide-band octagonal ring-shaped antenna is proposed for human interface device and S-band applications. The isolation structure comprises a parasitic element and a T-shaped structure. The antenna has −10 dB impedance bandwidth 63% (2.1–4.0 GHz) with miniaturized dimension of 54.98 mm × 76 mm. The multiple input multiple output (MIMO) antenna gain is 2.83 dBi at the 2.4 GHz resonant frequency. The designed MIMO has envelop correlation coefficient of 0.026 in the 2:1 VSWR band. The −10 dB total active reflection coefficient bandwidth of 1.2 GHz has been achieved in the entire frequency band, and has MEG value of ≤−3 dB. The specific absorption rate has found below the safety limit near the human head, palm and wrist.

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“…Various UWB MIMO antennas have been reported in recent years [3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18]. But some of them are not compact enough for the small wireless devices [3][4][5].…”

Section: Introductionmentioning

confidence: 99%

“…Various UWB MIMO antennas have been reported in recent years . But some of them are not compact enough for the small wireless devices .…”

Section: Introductionmentioning

confidence: 99%

A miniaturized triple band‐notched MIMO antenna for UWB application

Yang

Hong

et al. 2016

Micro & Optical Tech Letters

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A MIMO/Diversity antenna with triple notch characteristics is proposed in this article. The proposed antenna has triple notches in the WiMAX band (3.3-3.6 GHz), WLAN band (5-6 GHz), and X-band satellite communication (7.2-8.4 GHz) band. Defected Ground Compact Electromagnetic Band Gap (DG-CEBG) is a design used to accomplish band notches. Defected ground planes are utilised so as to achieve compactness in conventional EBG structures. The proposed WiMAX band, WLAN band, and X-band satellite communication band DG-CEBG structures show a compactness of around 46%, 50%, and 48%, respectively, over a conventional EBG structure. In these structures, decoupling strips and a slotted ground plane are used to enhance the isolation between two closely spaced UWB monopoles. The individual monopoles are 90 • angularly separated with a stepped structure which helps to reduce mutual coupling and also contributes towards impedance matching by increasing the current path length. |S 21 | or mutual coupling is found to be less than 15 dB over the whole UWB frequency range. The Envelope Correlation Coefficient (≤ 0.5) is within the acceptable limits over the whole UWB frequency range. Notched frequency depends on the parameters of DG-CEBG structures; when there is a change in these parameters notch frequency is also changed. A low cost FR-4 substrate with thickness (h) = 1.6 mm, permittivity (ε) = 4.4 and loss tangent (δ) = 0.02 is used for the proposed antenna, and it has a compact size of 58 × 45 × 1.6 mm 3 .

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Design of a folded UWB MIMO antenna for an on‐body application

Cited by 4 publications

References 8 publications

Compact ultra-wideband pattern diversity antenna for body-centric communications

Compact ultra-wideband pattern diversity antenna for body-centric communications

Octagonal-shaped wideband MIMO antenna for human interface device and S-band application

A miniaturized triple band‐notched MIMO antenna for UWB application

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