Elements Failure Detection and Radiation Pattern Correction for Time-Modulated Linear Antenna Arrays Using Particle Swarm Optimization

Malhat, Hend A.; Zainud-Deen, Anas Saber; Rihan, Mohamed; Badway, Mona M.

doi:10.1007/s11277-022-09645-7

Cited by 14 publications

(2 citation statements)

References 26 publications

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“…To observe the element-wise impact on array failure, the different radiation parameters of the pattern with array failure and that corresponding to the corrected pattern are presented in Table 2. As evidence from the reported literatures [20][21][22][23][24][25][26][27], it can be observed that the element failure toward the array edge has less influence on the pattern and the degraded pattern under such cases can be reconfigured closed to that of the original failure free pattern. On the other hand, the element failure near the center elements strongly effects the pattern and the proposed method can be used to correct the same with little compromisation of SLL.…”

Section: Failure Correction Using Rectangular Pulsementioning

confidence: 89%

“…Toward the aim of reconfiguring the far-field pattern in conventional phase arrays (CPAs) by re-estimating the amplitude and phase distributions of the remaining active elements, several methods based on numerical techniques such as a conjugate gradient [22], sparse recovery [23], and stochastic optimization approaches using GA [24] and firefly algorithm [25] have been reported. Also, the potentiality of time-modulation (TM) to reconfigure the center frequency pattern in the presence of element failure is presented in [26, 27].…”

Section: Introductionmentioning

confidence: 99%

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Trapezoidal pulse-switching strategy for failure correction of multi-pattern time-modulated linear array

Mukherjee

Mandal

et al. 2022

Int. J. Microw. Wireless Technol.

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In this paper, a novel approach for simultaneously correcting multiple degraded patterns under the failure condition of time-modulated linear arrays is proposed. The approach is based on the use of trapezoidal pulse with non-zero rise/fall time to control the switching status of the radio frequency switches that enables ON-OFF keying modulation of the array elements. After deriving a closed form expression of harmonic power loss and through the in-depth analysis, it is explored that the proposed trapezoidal pulse, because of having non-zero rise/fall time, provides less undesired harmonic power loss as compared to the conventionally used rectangular pulse with ideally zero rise/fall time. With the aim of reconstructing the degraded patterns with improved directivity and suppressed higher sideband power, three pulse-switching strategies based on rectangular and trapezoidal pulse have been employed, and their comparative performances prove the superiority of the proposed approach.

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Section: Failure Correction Using Rectangular Pulsementioning

confidence: 89%

Section: Introductionmentioning

confidence: 99%

Trapezoidal pulse-switching strategy for failure correction of multi-pattern time-modulated linear array

Mukherjee

Mandal

et al. 2022

Int. J. Microw. Wireless Technol.

View full text Add to dashboard Cite

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Fundamental/harmonics beam control using 1-bit space time-modulated plasma DMA

2023

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This paper investigates a space-time modulated digital metamaterial array (DMA) based on reconfigurable plasma ionization. The DMA consists of 8 × 8 unit-cell elements with total dimensions of 120 × 120 × 3.2 mm3. Each unit-cell consists of a ring container filled with argon gas and is backed with a grounded dielectric substrate. The argon gas is ionized into a plasma state through metallic electrodes. The logic state of the unit cell is controlled via the changing of the plasma frequency, $${\omega }_{p}.$$ ω p . The value of $${\omega }_{p}=6\times {10}^{11}\mathrm{ rad}/\mathrm{sec}$$ ω p = 6 × 10 11 rad / sec represents logic “0”, and $${\omega }_{p}=8\times {10}^{11} \mathrm{rad}/\mathrm{sec}$$ ω p = 8 × 10 11 rad / sec represents logic “bit 1”. The periodic time switching of the plasma ionization controls the radiation at the fundamental and harmonic frequencies. The on-time instants and on-time durations control the number of radiated beams, their directions, amplitudes, and side-lobe levels. Different time-switching sequences are investigated for beam steering, dual-sum beams, broadside beams, end-fire beams, multi-beams, and fan-shaped beams for wireless communications applications. The DMA was investigated under different switching sequences for phase-modulation and amplitude-modulation schemes. A full-wave simulation CST Microwave Studio simulator is used to analyze the proposed DMA and the results are compared with ideal point sources array excited with the same switching sequences.

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Community detection in network using chronological gorilla troops optimization algorithm with deep learning based weighted convexity

2023

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Elements Failure Detection and Radiation Pattern Correction for Time-Modulated Linear Antenna Arrays Using Particle Swarm Optimization

Cited by 14 publications

References 26 publications

Trapezoidal pulse-switching strategy for failure correction of multi-pattern time-modulated linear array

Trapezoidal pulse-switching strategy for failure correction of multi-pattern time-modulated linear array

Fundamental/harmonics beam control using 1-bit space time-modulated plasma DMA

Community detection in network using chronological gorilla troops optimization algorithm with deep learning based weighted convexity

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