A compact band-notched antenna with high isolation for UWB MIMO applications

Masoodi, Issmat Shah; Ishteyaq, Insha; Muzaffar, Khalid; Magray, M. Idrees

doi:10.1017/s1759078720001427

Cited by 27 publications

(18 citation statements)

References 17 publications

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“…These techniques are, defected ground structure [9,10], decoupling network [11,12], space diversity [13], parasitic elements [14,15], neutralization rings [16], different stub and slots [17][18][19][20][21][22], shorting pins [23], metamaterials [24], and non-uniform transmission line using nonlinear model predictive to reduce mutual coupling [25].…”

Section: Introductionmentioning

confidence: 99%

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Isolation and Gain Improvement of a Rectangular Notch UWB-MIMO Antenna

Abbas

Hussain

Sufian

et al. 2022

Sensors

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This paper presents the performance improvement of a co-planar waveguide rectangularly notched UWB-MIMO antenna. The isolation and gain of the antenna are enhanced by using a parasitic isolator. The antenna consists of four microstrip patch antennas and an isolator. The UWB characteristic of the antenna is achieved by truncating the lower ends of the radiating patch by a semicircle. The rectangular notch characteristic is obtained by adding two electromagnetic bandgap structures on the backside of the antenna, which is attached to the radiator via shorting pin. The performance, especially the decoupling of the MIMO antenna is improved by using a novel parasitic decoupler, which is placed between the antennas to receive uncorrelated signals. The decoupling structure consists of a square shape metallic element with a circular slot inside and a half-semicircle slot edged at each corner. Four rectangular metallic stubs are extended from opposite parallel sides to improve further isolation. The simulated and measured results show that the antenna has a rectangular notch band (5.25–5.85 GHz) across the working band of 3–12.8 GHz. In addition, the antenna has a planar structure with an overall size of 60 × 60 × 1.52 mm3 and offers stable gain, reduced mutual coupling (<−21 dB), and lower envelop correlation (<0.001).

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Section: Introductionmentioning

confidence: 99%

“…The defective ground systems have been widely used in the literature to improve isolation [9,10]. Moreover, a T-shaped ground stub is used in [11] and a strip is placed beneath the radiation patch which is connected through via serving as a decoupler to improve isolation [12].…”

Section: Introductionmentioning

confidence: 99%

Isolation and Gain Improvement of a Rectangular Notch UWB-MIMO Antenna

Abbas

Hussain

Sufian

et al. 2022

Sensors

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show abstract

“…Polarization orthogonal elements [11], Electromagnetic band-gap (EBG) structure [12], Meanderline EBG [13], neutralization line [14,15], stubs [16,17,18], parasitic elements [19,20], shorting pin [21], metamaterials with neutralization lines [22], [23], slots or carbon black film [24] have been presented in the literature. In [11], a MIMO system with two antenna elements that achieve orthogonal polarization with dimensions of 27 × 21 mm2 and an isolation level of 22.5 dB has been presented.…”

Section: Introductionmentioning

confidence: 99%

Quad-Port MIMO Filtenna With High Isolation Employing BPF With High Out-of-Band Rejection

2022

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A quad-port multiple-input multiple-output (MIMO) filtenna with compact dimensions of 50 × 50 mm2 are configured, in which each element is placed orthogonally to its adjacent to enhance the isolation. The MIMO element is configured based on the novel COVID-19 virus shape with a co-planar waveguide feeding structure (CPW) and dimensions 17 × 22 mm2. The element bandwidth is ranging from 3.3 GHz to more than 60 GHz. Three frequency notches are designed at 3.5 GHz for WiMAX and 5.5 GHz for WLAN, and 8.5 GHz for X-band applications. A bandpass filter (BPF) with high out of band rejection is used as a decoupling structure (DS) to improve the isolation to more than 30 dB across most of the bandwidth. The equivalent circuit model is scrutinized to investigate the enactment of the decoupling structure. The proposed MIMO filtenna system provides an impedance bandwidth of 2.4-18 GHz, a peak gain of 13.2 dBi, and an envelope correlation coefficient (ECC) less than 0.00021. In turn, channel capacity loss does not exceed 0.2. The MIMO filtenna is fabricated and measured. Good agreement between the measured and simulation results is achieved.

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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 −20 dB enhanced isolation is attained by adding a compact I-shaped stub to the antenna ground. An asymmetrical cup-shaped MIMO antenna having UWB communication properties is designed in [18]. The antenna operating bandwidth is from 3.1 to 11 GHz having a WLAN notched band.…”

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 band-notched antenna with high isolation for UWB MIMO applications

Cited by 27 publications

References 17 publications

Isolation and Gain Improvement of a Rectangular Notch UWB-MIMO Antenna

Isolation and Gain Improvement of a Rectangular Notch UWB-MIMO Antenna

Quad-Port MIMO Filtenna With High Isolation Employing BPF With High Out-of-Band Rejection

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

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