UWB monopole patch antenna with two H-shaped slots and dual-band notch for WLAN and WiMAX applications

Abayaje, Furat; Alameri, Ban M.; Mezaal, Yaqeen S.

doi:10.3176/proc.2021.2.05

Cited by 9 publications

(8 citation statements)

References 21 publications

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“…The end output is shown in Figure 15 when a moderately detailed image is used as input. Image filtering by convolution can be adopted along with wireless communication elements as in [10][11][12][13][14], for better wireless transmission of images.…”

Section: Resultsmentioning

confidence: 99%

Image filtering by convolution

Sultan¹,

Taher²,

Maki³

2023

PEN

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Image filtering is a common technique used in digital image processing that can be used to take a picture appear differently aesthetically. Noise, also known as distracting visual artifacts, can lower the overall quality of a picture, which is why image improvement techniques are required to fix the problem. It can be utilized in a variety of ways, including smoothing, sharpening, reducing noise, and detecting borders, to name a few. In this piece, we will be using convolutional techniques to correct the images that were messed up. The first thing that needs to be done is a point-by-point multiplication of the frequency domain representation of the picture that's being entered through a black image that has a small white rectangle in the mid of it. This is the first step. Only the lowest harmonics are kept after we apply a filter that gets rid of the higher ones. Because the high frequencies in the input picture are filtered out, the special domain of the image that is produced should look like a blurrier variation of the original picture. Therefore, a greater degree of detail preservation is indicated when the white rectangle W is larger because this indicates that more high-frequency components of I have been preserved.

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Section: Resultsmentioning

confidence: 99%

Image filtering by convolution

Sultan¹,

Taher²,

Maki³

2023

PEN

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“…This means that the slot is useful to delay the separation of the flow. Using developed wireless monitoring systems for turbines based on compact antennas and filters and Internet of Thing (IoT) are useful future work of this study [20][21][22][23][24].…”

Section: Resultsmentioning

confidence: 99%

Evaluating the effect of unsteady air flow on a slotted aerofoil of wind turbines

Aljuhashy¹,

Al-Bakri²,

Alrubaiy³

2023

PEN

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In this study, three types of aerofoils were examined at various angles of attack and at a steady value then fluctuated of air flow. Then, the findings were compared to the XFOIL prediction results. The experimental and simulation results were consistent to some extent with the XFOIL prediction results. The shape of the chosen aerofoils was modified by making a slot through the blade the aerofoil and studying their effect on the aerodynamics of the modified shape. The slotted aerofoil shape was studied as it faced a fluctuated wind flow. The results revealed that the increase in angles of attack, the lift force increased and approximated its maximum value and then began to decrease with the slot. During the calculations, a case study for the number of elements was done to obtain the best mesh.The experimental and simulations were conducted by using ANSYS CFD at Reynolds number 10 6 and AOA equals (0°, 4°, 8°, 10°, 12°, 15°, 16°, 17°, 18°) for three shapes of aerofoils which are without a slot, two of which are symmetrical, NACA 0012 and NACA 0015, and one asymmetrical, which is NACA 4415. The slotted aerofoil (existence of an opening after 40% from the leading edge) which is the NACA 0015 aerofoil, was simulated.

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“…The results have been presented above. Microstrip filters and antennas can boost power wireless transmission as future trends [32][33][34][35][36].…”

Section: Resultsmentioning

confidence: 99%

A novel approach for coordinated design of TCSC controller and PSS for improving dynamic stability in power systems

Alwan¹

2023

PEN

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The purpose of this article is to present a novel strategy for the coordinated design of the Thyristor Controlled Series Compensator (TCSC) controller and the Power System Stabilizer (PSS). A time domain objective function that is based on an optimization problem has been defined. This objective function takes into account not only the influence that disturbances have on the mechanical power, but also, and this is more accurately the case, the impact that disturbances have on the reference voltage. When the objective function is minimized, potential disturbances are quickly mitigated, and the deviation of the speed of the generator's rotor is limited; as a result, the system's stability is ultimately improved. Particle Swarm Optimization (PSO) and the Shuffled Frog Leaping Algorithm are both components of a composite strategy that is utilized in the process of determining the optimal controller parameters. (SFLA). An independent controller design as well as a collaborative controller design utilizing PSS and TCSC are developed, which enables a direct evaluation of the functions performed by each. The presentation of the eigenvalue analysis and the findings of the nonlinear simulation can help to provide a better understanding of the efficacy of the outcomes. The findings indicate that the coordinated design is able to successfully damp low-frequency oscillations that are caused by a variety of disturbances, such as changes in the mechanical power input and the setting of the reference voltage, and significantly enhance system stability in power systems that are connected weekly.

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UWB monopole patch antenna with two H-shaped slots and dual-band notch for WLAN and WiMAX applications

Cited by 9 publications

References 21 publications

Image filtering by convolution

Image filtering by convolution

Evaluating the effect of unsteady air flow on a slotted aerofoil of wind turbines

A novel approach for coordinated design of TCSC controller and PSS for improving dynamic stability in power systems

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