Statistically Thinned Array Antennas for Simultaneous Multibeam Applications

Buonanno, Giovanni; Costanzo, Sandra; Solimene, Raffaele

doi:10.1109/access.2022.3181168

Cited by 7 publications

(7 citation statements)

References 26 publications

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“…In future developments, the concept of fractals will be further exploited to enhance the miniaturization level of MA-based sensors. Additionally, the proposed MA absorber will be integrated with reconfigurable materials or components, such as PIN diodes, to implement switchable functions like absorption/polarization conversion [16], which can increase sensing capabilities, even exploiting a random distribution of elements, such as that adopted in the various design schemes for statistical arrays [71][72][73][74][75][76][77].…”

Section: Discussionmentioning

confidence: 99%

Fractal Metamaterial Surfaces for UHF Sensing Applications

Venneri,

Costanzo,

Borgia

et al. 2024

IEEE Access

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A dual-band fractal metamaterial absorber is proposed as a promising alternative for sensing applications. A preliminary prototype, useful to validate the proposed configuration, is designed to operate in the Ultra-High Frequency (UHF) range. The inherent miniaturization skills of fractal geometries are effectively exploited to design and fabricate multiband/broadband absorbers with a small lattice size (0/2 at the smaller operating frequency f0) and a very thin profile (0/100). Two pairs of Minkowski fractal patches, alternately arranged in four different quadrants and properly sized to achieve two distinct absorption peaks, are assumed for the absorber-sensor configuration. Good sensing performance in terms of sensitivity and quality factor (Q) is achieved in the framework of dielectric material diagnostics. Very high absorption rates (>99%) and a quite good angular stability are demonstrated both numerically as well as through experimental validations, thus proving the applicability of the proposed absorber sensor in low-frequency sensing applications.

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Section: Discussionmentioning

confidence: 99%

Fractal Metamaterial Surfaces for UHF Sensing Applications

Venneri,

Costanzo,

Borgia

et al. 2024

IEEE Access

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“…Recently, a rigorous and complete statistical description of STAs has been provided in [21]. Also, STAs are usually employed for single-beam patterns, whereas in [22] it is shown that STAs can be employed to generate multi-beam patterns.…”

Section: Introductionmentioning

confidence: 99%

Broadband Statistically Designed Thinned-Binned Array Antennas

Buonanno

Costanzo

Solimene³

2023

IEEE Trans. Antennas Propagat.

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Statistically thinned arrays are obtained by thinning a reference filled array, according to a probabilistic law which is dictated by the reference current. The remaining radiators are still separated by commensurable distances, even if randomly located. Hence, wide-band operations are prevented by grating lobes occurrence. To overcome the above limitation, a new and simple strategy is presented in this paper for randomly deploying the elemental radiators across the array aperture. More in detail, unlike classic thinned arrays, elements surviving the thinning are not positioned on a priori fixed deterministic lattice. Instead, their positions are modeled as random variables, which are determined by exploiting the binned strategy. Numerical examples reveal that the new proposed scheme allows for a considerable enlargement of the frequency band, without incurring in grating lobes appearance.

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“…The focus beam synthesis method based on the genetic algorithm, proposed in [26] to optimize the frequency offset increment, can synthesize single-point and multipoint transmission beams, and can also suppress sidelobes. FDA can also use adaptive [27], multibeam [28], broadband applications [29], and reconfigurable [30] thinned array methods to reduce sidelobe levels and reduce interference.…”

Section: Introductionmentioning

confidence: 99%

Beampattern Synthesis and Optimization for Frequency Diverse Arc Array Based on the Virtual Element

Huang

Tan

et al. 2023

Electronics

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With its special, arch-shaped array structure, a frequency diverse arc array (FDAA) can perform beam scanning in 360 degrees in azimuth and in arbitrary ranges by selectively activating array elements in different positions, utilizing array element phase compensation, and adopting a frequency offset design. In this paper, a beampattern synthesis and optimization method for FDDA using the virtual array element based on the geometric configuration of FDDA is proposed. First, the position of the virtual array element is determined by the direction of the target, and then activated array elements are selected. Afterwards, the frequency offset of each array element is set up on the equiphase surface to obtain the dot-shaped beampattern. Finally, amplitude weighting is introduced to suppress the increased sidelobe level of the dot-shaped beampattern, which is caused by inverse density weighting of the arch-shaped array structure. Simulation results validate the proposed method for beampattern synthesis and optimization in FDAA.

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Statistically Thinned Array Antennas for Simultaneous Multibeam Applications

Cited by 7 publications

References 26 publications

Fractal Metamaterial Surfaces for UHF Sensing Applications

Fractal Metamaterial Surfaces for UHF Sensing Applications

Broadband Statistically Designed Thinned-Binned Array Antennas

Beampattern Synthesis and Optimization for Frequency Diverse Arc Array Based on the Virtual Element

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