Compact wearable MIMO antenna with improved port isolation for ultra‐wideband applications

Biswas, Ashim Kumar; Chakraborty, Ujjal

doi:10.1049/iet-map.2018.5599

Cited by 82 publications

(42 citation statements)

References 28 publications

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“…Simulated and measured capacity loss are shown in Figure . The acceptable capacity loss for a MIMO system is less than <0.4 b/s/Hz, and it can be found that the proposed antenna provides capacity loss <0.1 b/s/Hz except at the notch band.…”

Section: Resultsmentioning

confidence: 92%

“…Capacity Loss is a measure of channel capacity loss provided by a MIMO system. It is calculated by using the following equation:

C_{loss} = - \log_{2} \det ((), [\begin{matrix} center \\ 1 - ({(||, S_{11})}^{2} + {(||, S_{12})}^{2}) & - (S_{11}^{*} S_{12} + S_{21}^{*} S_{12}) \\ - (S_{22}^{*} S_{21} + S_{12}^{*} S_{21}) & 1 - ({(||, S_{22})}^{2} + {(||, S_{21})}^{2}) \end{matrix}])

…”

Section: Resultsmentioning

confidence: 99%

“…The approaches reported till now can be broadly classified into polarization diversity, pattern diversity, quasi‐complementary structures, and the use of additional decoupling structures techniques.…”

Section: Introductionmentioning

confidence: 99%

“…Quasi‐complementary antenna elements are implemented as in Reference and are arranged in an orthogonal manner and excited, to achieve high isolation due to the self‐complementary structure of the antenna. In Reference , G‐shaped antenna elements are collocated to each other, and mutual coupling between the elements is reduced by placing a T‐shaped strip on the ground plane. In Reference , two closely placed ring‐ shaped antenna elements are utilized, and high isolation is achieved by placing an 8‐shaped stub on the ground plane.…”

Section: Introductionmentioning

confidence: 99%

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Compact hybrid Sierpinski Koch fractal UWB MIMO antenna with pattern diversity

Rajkumar¹,

Selvan²

2019

Int J RF Microw Comput Aided Eng

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Section: Resultsmentioning

confidence: 92%

“…Capacity Loss is a measure of channel capacity loss provided by a MIMO system. It is calculated by using the following equation:

C_{loss} = - \log_{2} \det ((), [\begin{matrix} center \\ 1 - ({(||, S_{11})}^{2} + {(||, S_{12})}^{2}) & - (S_{11}^{*} S_{12} + S_{21}^{*} S_{12}) \\ - (S_{22}^{*} S_{21} + S_{12}^{*} S_{21}) & 1 - ({(||, S_{22})}^{2} + {(||, S_{21})}^{2}) \end{matrix}])

…”

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Compact hybrid Sierpinski Koch fractal UWB MIMO antenna with pattern diversity

Rajkumar¹,

Selvan²

2019

Int J RF Microw Comput Aided Eng

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“…This technology can immensely improve the channel capacity, data rate, and link safety of wireless systems by multi-path data communication [6]. These systems conduct the power through multiple antennas at the transmitter and receiver thereby enhancing the channel capacity without the use of supplementary bandwidth or power [7]. These systems are at present engaged in 4G user material and are a rising technology for service in the eventual 5G mobile terminals.…”

Section: Introductionmentioning

confidence: 99%

A CPW fed two and four element antenna with reduced mutual coupling between the antenna elements for wireless applications

2021

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Mutual coupling between the multiple antenna designs is a critical problem which deteriorates the performance of multiple input multiple output (MIMO) system. It affects the antenna efficiency and influences the correlation. In this paper, a study on the isolation between the multiple antenna elements is presented. The antennas are placed on a cost-effective compact dielectric substrate with different orientations to minimize the correlation. A CPW fed antenna is designed using FR4 substrate, using which two and four element antenna structures are developed. The performance parameters are analysed, wherein the envelope correlation coefficient (ECC) has to be less than 0.5, diversity gain nearer to 10 dB in the operating bandwidth, mean effective gain (MEG) less than 3 dB, channel capacity loss (CCL) less than 0.4 bits/s/Hz and the isolation between the antenna elements well above 20 dB. Acceptable gain, high radiation efficiency, and stable radiation pattern of the proposed design are analysed and the fabricated prototype of two and four element is measured for its performance parameters. All the necessary simulations are carried out in the EM simulator Ansys HFSS v.14.0 and a detailed comparison study is done based on the existing antennas.

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A compact four‐element MIMO antenna for WLAN/WiMAX/satellite applications

Saadh

Khangarot²,

Sravan³

et al. 2020

Int J Communication

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SummaryThis paper presents a four‐element wideband monopole MIMO antenna. Initially, a single‐element wideband CPW‐fed antenna is designed operating in the range of 4.30 to 6.45 GHz. Using this design, an approach towards MIMO structure is studied. A two‐element structure is designed keeping them adjacent to each other, and the isolation between the antennas is observed. After which, a four‐element structure is designed having the best orientation in order to achieve good isolation between the antenna elements. The proposed antenna configuration has four identical CPW‐fed elements. The proposed configuration has a fractional bandwidth of 40.27% and has a simulated peak gain of 5.5 dBi. This antenna is intended to be used for WLAN, WiMAX, and satellite bands of range corresponding to 4.70–6.19, 5.5–5.7, and 5–6 GHz. All the necessary antenna simulations are simulated using Ansys HFSS and verified on NI AWR Design Environment. The fabricated model of the proposed design is measured for its performance parameters and validated.

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Compact wearable MIMO antenna with improved port isolation for ultra‐wideband applications

Cited by 82 publications

References 28 publications

Compact hybrid Sierpinski Koch fractal UWB MIMO antenna with pattern diversity

Compact hybrid Sierpinski Koch fractal UWB MIMO antenna with pattern diversity

A CPW fed two and four element antenna with reduced mutual coupling between the antenna elements for wireless applications

A compact four‐element MIMO antenna for WLAN/WiMAX/satellite applications

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