Designing band notch features in ultra-wideband antenna

Kamal, Mian Muhammad; Ullah, Inam; Ashraf, Adnan; Ullah, Naveed

doi:10.1109/mape.2017.8250805

Cited by 4 publications

(3 citation statements)

References 5 publications

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“…CNN is an artificial neural network with an architecture similar to ordinary neural networks [41]. CNN has a three-part structure, namely, input neurons, learnable weights, and deviations, and is widely used in the field of handwritten character recognition [42][43][44][45][46] and face recognition [47]. e explicit assumption that the image is input is made by the CNN architecture, which allows us to encode certain attributes into the architecture.…”

Section: Cnnmentioning

confidence: 99%

Efficient Algorithms for E-Healthcare to Solve Multiobject Fuse Detection Problem

Ahmad¹,

Ullah

Khan

et al. 2021

Journal of Healthcare Engineering

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Object detection plays a vital role in the fields of computer vision, machine learning, and artificial intelligence applications (such as FUSE-AI (E-healthcare MRI scan), face detection, people counting, and vehicle detection) to identify good and defective food products. In the field of artificial intelligence, target detection has been at its peak, but when it comes to detecting multiple targets in a single image or video file, there are indeed challenges. This article focuses on the improved K-nearest neighbor (MK-NN) algorithm for electronic medical care to realize intelligent medical services and applications. We introduced modifications to improve the efficiency of MK-NN, and a comparative analysis was performed to determine the best fuse target detection algorithm based on robustness, accuracy, and computational time. The comparative analysis is performed using four algorithms, namely, MK-NN, traditional K-NN, convolutional neural network, and backpropagation. Experimental results show that the improved K-NN algorithm is the best model in terms of robustness, accuracy, and computational time.

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Section: Cnnmentioning

confidence: 99%

Efficient Algorithms for E-Healthcare to Solve Multiobject Fuse Detection Problem

Ahmad¹,

Ullah

Khan

et al. 2021

Journal of Healthcare Engineering

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“…A sufficient distance between nearby patches is required to reduce mutual coupling [4]. To solve this problem, several methods have been explored to reduce mutual coupling, such as an electromagnetic band gap (EBG) structure [5][6][7], defected ground structure (DGS) [8,9], neutralization lines [10], stub loading technique [11], slots [12], meta-material [13], and resonator structures [14]. A wide-band two-port circularly polarized MIMO printed antenna is obtained by designing the ground plane and employing asymmetric Z-shaped radiating patches to improve isolation [15].…”

Section: Introductionmentioning

confidence: 99%

Designed Circularly Polarized Two-Port Microstrip MIMO Antenna for WLAN Applications

Khan

Ullah

et al. 2022

Applied Sciences

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The proposed work describes a corner square-cut square-patch multiple-input multiple-output (MIMO) antenna with reduced mutual coupling for circular polarization (CP). A two-port MIMO-CP antenna was designed and operated at 5.6 GHz for wireless local area network (WLAN) applications. The dimensions of the MIMO-CP antenna were 22.5×50mm2(0.43λ0×0.933λ0) and the FR4 substrate height was 1.6 mm. Between the two-elements, the edge-to-edge distance was 12.2 mm (0.227 λ0), where λ0 was the free space wavelength at 5.6 GHz. A slot was created in the middle of the ground in the proposed MIMO antenna to reduce mutual coupling and improve CP. The ground slot improves impedance matching and provides a better S-parameter and axial ratio (AR), according to the antenna results. According to the simulated results, the proposed antenna bandwidth of 5.23–6.42 GHz (21.4%) for S11 were <−10 dB, isolation was −37 dB with a peak gain of 6 dB and AR ≤3 dB from 5.37 to 5.72 GHz (6.25%). The proposed antennas are simple to fabricate, have low profiles, are inexpensive, have good isolation, and are CP. The diversity gain (DG) and envelop correlation coefficient (ECC) results are better in the simulated frequency band. A MIMO-CP antenna geometry prototype is built and measured for comparison, yielding good results when compared to the simulated and measured results. The MIMO-CP antenna, as designed, is suitable for WLAN applications.

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“…In different papers, different feeding techniques such as microstrip line, coaxial probe, and CPW feed are used to excite multiple modes in DRA [21][22][23][24]. In some cases, pentagon and hexagon shapes of feeding structures have been used to achieve multiple bands [25]. In [26], Hamsakutty et al achieved a triple band by using two segments of rectangular DRA, which make the overall structure bulky.…”

Section: Introductionmentioning

confidence: 99%

Bidirectional CPW Fed Quad-Band DRA for WLAN/WiMAX Applications

Iqbal

Owais

Kaabar

et al. 2022

Wireless Communications and Mobile Computing

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Due to the size constraint, antennas with compact size are required that can support multibands with single radiating element. Dielectric resonator antenna (DRA) can support multiple modes with good efficiency and gain using single radiating element. In this paper, a quad-band DRA is proposed for WLAN/WiMAX bands using a single CPW feed. Out of four bands, WLAN (2.37-2.55) GHz, (5.15-5.35) GHz, and (5.6-5.83) GHz are achieved by the excitation of fundamental and higher-order modes whereas WiMAX (3.58-3.72) GHz band is achieved by dielectric loading of the DR. Dielectric loading makes it possible to operate the antenna at desired frequency band. Due to the partial ground plane and single coplanar waveguide (CPW) feed radiation pattern of the proposed antenna is bidirectional. The design is efficient in terms of radiation efficiency. Simulated and measured results show that it can be a suitable candidate for WLAN and WiMAX applications.

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Designing band notch features in ultra-wideband antenna

Cited by 4 publications

References 5 publications

Efficient Algorithms for E-Healthcare to Solve Multiobject Fuse Detection Problem

Efficient Algorithms for E-Healthcare to Solve Multiobject Fuse Detection Problem

Designed Circularly Polarized Two-Port Microstrip MIMO Antenna for WLAN Applications

Bidirectional CPW Fed Quad-Band DRA for WLAN/WiMAX Applications

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