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Spurious-Mode Suppression in Sc0.2Al0.8N Film Lamb Wave Resonators and Filters with Arc-Shaped Apodization [PDF]
MicromachinesLamb wave devices have the advantage of monolithic multi-frequency integration and show great application potential in mobile communications. However, their performance is often limited by spurious modes. In this work, an arc-shaped apodization electrode
Kai Cai +4 more
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Towards the Optimization of Apodized Resonators [PDF]
MicromachinesBulk Acoustic Wave (BAW) resonators are essential components in modern RF communication systems due to their high selectivity and quality factor. However, spurious resonances caused by Lamb wave mode propagation along the in-plane directions degrade the ...
Ana Valenzuela-Pérez +2 more
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Azimuth apodization for autoregressive synthetic‐aperture radar imaging
IET Radar, Sonar & Navigation, 2021 Autoregressive backprojection (ARBP) approximates the procedure of forming synthetic‐aperture radar (SAR) sequential images as an autoregressive (AR) process, avoiding redundant computation between adjacent images.
Guo Zhang, Maoqiang Jing
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Photonics, 2021 A schematic diagram of a RoF radio-optic system with vortex signals is presented, in which the radio frequency is determined by the difference between the wavelengths of two lasers.
Irina Vinogradova +8 more
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Spectral Domain Sparse Representation for DOA Estimation of Signals with Large Dynamic Range
Sensors, 2021 Recently, we proposed a Spectral Domain Sparse Representation (SDSR) approach for the direction-of-arrival estimation of signals incident to an antenna array. In the approach, sparse representation is applied to the conventional Bartlett spectra obtained
Jacob Compaleo, Inder J. Gupta
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Laser beam shaping in an apodizer with a rectangular serrated aperture
Компьютерная оптика, 2023 Profile transformation of a uniform monochromatic beam with a flat wavefront after the propagation through an apodizer comprising a square serrated aperture and a spatial filter is theoretically considered at the apodizer exit and behind it.
I.M. Sizova
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Frontiers in Materials, 2021 Traditional radio frequency filters cannot meet the demands of miniaturization, high frequency operation, integration, and broadband capacity in new-generation communication system owing to their larger volumes. A thin film bulk acoustic resonator (FBAR)
Pingying Jiang +8 more
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Optimal parameters for fiber Bragg gratings for sensing applications: a spectral study
SN Applied Sciences, 2021 The spectral characteristics viz. reflectivity, bandwidth, and sidelobes’ intensity for uniform and apodized (Gaussian, hyperbolic tangent, apod1, sine, and raised sine) fiber Bragg gratings (FBGs) were studied as a function of grating length and index ...
P. V. Raja Shekar +3 more
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Компьютерная оптика, 2022 In this paper, attempts have been made to study the joint effects of apodization and aperture masking on the diffraction images of coherently illuminated straight edge. The Edge-Ringing, Edge-Shift and Edge-Eradient of the edge images have been evaluated
M. Venkanna, K.D. Sagar
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Femtosecond Laser Fabricated Apodized Fiber Bragg Gratings Based on Energy Regulation
Photonics, 2021 In this paper, an energy regulation method based on the combination of a half-wave plate (HWP) and a polarization beam splitter (PBS) is proposed for the fabrication of apodized fiber gratings, which can effectively improve the side lobe suppression ...
Qi Guo +7 more
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