A compact CPW-fed band-notched UWB-MIMO flexible antenna for WBAN application

Du, Chengzhu; Jin, Gao-Ya

doi:10.1080/09205071.2020.1868354

Cited by 18 publications

(10 citation statements)

References 22 publications

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“…as well, the efficiency of the individual antenna can be affected 12 which leads to the use of decoupling structures to reduce the mutual coupling which in turn increases the complexity of the design 10 , 13 . Both 2-port and 4-port with rigid and flexible substrates and with suitable isolation can be utilized in the MIMO systems 13 – 23 .…”

Section: Introductionmentioning

confidence: 99%

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A systematic investigation of four ports MIMO antenna depending on flexible material for UWB networks

Ibrahim

Ahmed

2022

Sci Rep

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A flexible quad-port MIMO antenna with good isolation features with both flat and bending configurations is presented and investigated in this work. The single unit of the MIMO is composed of a crescent-shaped monopole antenna connected with a curved coplanar waveguide (CPW) fed to enhance the operating bandwidth. A thin and flexible Roger 3003 material with thickness = 0.13 mm, εr = 3, and tan δ = 0.001 is used. To improve the isolation between ports which in turn improves the performance of the MIMO system, the single unit antenna is repeated four times and placed orthogonal to each other. A 54 mm × 54 mm × 0.13 mm (0.63λo × 0.63λo × 0.0015λo @ 3.5 GHz) is the total size of the quad ports MIMO antenna. The flexible MIMO antennas in both flat and bending layouts are simulated, tested and the outcomes achieved S11 < − 10 dB from 3.5 GHz up to 11 GHz with mutual coupling ≤ − 17 dB between ports. The radiation patterns of the MIMO antenna are tested with 5 dB peak gain and with semi-omnidirectional and bidirectional patterns in both two planes. The Diversity Gain (DG) values ≥ 9.9 dB through the designed working band, Envelop Correlation Coefficient (ECC) lower than 0.03 from 3.5 GHz to 4 GHz and lower than 0.01 from 4 to 11 GHz, and Channel Capacity Loss (CCL) value ≤ 0.5 bit/s/Hz over the worked band are calculated and extracted in flat and bending configurations and achieved suitable values which support the suggested antenna in the UWB flexible networks.

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Section: Introductionmentioning

confidence: 99%

“…In 20 , a 4 ports monopole antenna was placed on a flexible Rogers's substrate operating from 3.2 to 14 GHz and producing isolation and peak gain higher than 22 dB and 4.5 dBi. In 21 , 22 , and 23 a 2 ports MIMO antenna added on a flexible substrate with a large size operating are presented and investigated.…”

Section: Introductionmentioning

confidence: 99%

A systematic investigation of four ports MIMO antenna depending on flexible material for UWB networks

Ibrahim

Ahmed

2022

Sci Rep

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“…As for these overlapping frequency bands, a variety of notch band UWB antennas have been designed to form resistance characteristics in such corresponding frequency bands, including WiMAX, WLAN and X-Band. Notching techniques can be achieved by several methods, such as slotting the antenna structure [22,23,24], including U-shaped slot [25], H-shaped slot [26], etc. In [27], the notch property is realized by introducing an inverted U-shaped parasitic resonator.…”

Section: Introductionmentioning

confidence: 99%

A butterfly-like slot UWB antenna with WLAN band-notch characteristics for MIMO applications

Wang

Chen

et al. 2022

IEICE Electron. Express

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An ultra-wideband (UWB) antenna with butterfly-like coupling slot for 4-element multiple-input multiple-output (MIMO) applications is introduced in this letter. In the design of the UWB antenna unit, the proposed butterfly-like slot is adopted to improve the impedance matching and achieves the operating bandwidth of 3-12 GHz. At the same time, a symmetrical T-shaped meandering strip etched on the ground and connecting with the patch through via produces a notch at 5.1-5.37 GHz, which suppresses the signal interference in WLAN band simultaneously. The results show that the proposed antenna array consisting of four orthogonal elements realized good isolation of lower than −15 dB without any additional decoupled structures. Also, the proposed 2 × 2 MIMO design exhibited good diversity performance in terms of envelop correction coefficient (ECC<0.015), diversity gain (DG>9.92 dB). The gain reaches a maximum value of 6.8 dBi. Simulated and Measured results are in good accordance. All of this reveals the effectiveness of the proposed antenna in MIMO system and it can be suggested as a suitable candidate for UWB applications.

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“…To overcome the problem of mutual coupling, different decoupling structures are designed in [7][8][9][10]. UWB system also has some electromagnetic interference with coexisting narrow bands, thus different notch structures are presented to stop this interference [11][12][13][14][15][16][17][18][19][20][21][22][23].…”

Section: Introductionmentioning

confidence: 99%

“…The improved −18 dB isolation is secured by joining a T-structured stub to the antenna ground plane. In article [14], a CPW-fed flexible MIMO antenna having a WiMAX stopband is recommended for WBAN uses. The submitted antenna works from 2.4 to 11.3 GHz.…”

Section: Introductionmentioning

confidence: 99%

Design and Experimental Validation of Uwb Mimo Antenna With Triple Band-Notched Characteristics

Khan¹,

Feng²

2021

PIER C

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A compact pot-shaped Multiple Input Multiple Output (MIMO) Antenna with triple notched band characteristics is presented for Ultra Wide Band (UWB) applications. The comprehensive dimension of the presented antenna is 17 × 32 mm 2 . The presented antenna has two identical potshaped radiators, 7-shaped stubs, T-shaped strips, M-and C-shaped slots. Two novel 7-shaped stubs are connected to the antenna ground plane to obtain −22 dB enhanced isolation. The presented antenna works from 2.95 to 12.1 GHz with triple stopped WiMAX, WLAN, and X bands. A novel T-shaped strip is connected to the antenna ground plane to stop the WiMAX band (3.3-4.4) GHz. C-and M-shaped slots are etched in the antenna radiators to stop WLAN (5.20-6.12) GHz and X (7.6-8.15) GHz bands, respectively. The peak gain of the proposed antenna is from 1.5 to 5 dB with a radiation efficiency of 80-90%. The Envelope Correlation Coefficient (ECC) of the proposed antenna is less than 0.01 with a Diversity Gain greater than 9.99 except for the notched bands.

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A compact CPW-fed band-notched UWB-MIMO flexible antenna for WBAN application

Cited by 18 publications

References 22 publications

A systematic investigation of four ports MIMO antenna depending on flexible material for UWB networks

A systematic investigation of four ports MIMO antenna depending on flexible material for UWB networks

A butterfly-like slot UWB antenna with WLAN band-notch characteristics for MIMO applications

Design and Experimental Validation of Uwb Mimo Antenna With Triple Band-Notched Characteristics

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