Photonic integrated circuits for ultra-fast steering in phased-array antennas

Amato, Francesco; Serafino, Giovanni; Scotti, Filippo; Hussain, Bilal; Toccafondo, V.; Chiesa, Marco; Porzi, Claudio; Bogoni, Antonella; Ghelfi, Paolo

doi:10.1117/12.2536179

Cited by 2 publications

(3 citation statements)

References 7 publications

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“…This agrees well with the principal listening directions derived in Eq. (16). As a result, in practical applications, the frequency ( f ) and incident angle ( θ ) of the incoming beam can be figured out by inspecting the FFT amplitudes of the received voltages only.…”

Section: Numerical Validation and Methodsmentioning

confidence: 99%

“…This hypothesis can be easily tested out by inspecting the principal directions of each mode described by Eqs. (9) and (16). For a relatively slow temporal modulation of ω m /ω ≤ 0.1 , a binomial approximation can be used to obtain from Eq.…”

Section: Nonreciprocal Behaviormentioning

confidence: 99%

“…Using a similar configuration, acoustically controlled holograms have been most recently reported 14 . Nowadays, phased arrays are being used in the development of the SpaceX Starlink constellation to enhance global internet connectivity by exploiting its beam forming properties 15,16 . They have also been explored to enhance wireless capabilities of in-home WiFi and cellular networks 17,18 .…”

Section: Introductionmentioning

confidence: 99%

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Frequency selective wave beaming in nonreciprocal acoustic phased arrays

Adlakha

Moghaddaszadeh

Attarzadeh

et al. 2020

Sci Rep

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Acoustic phased arrays are capable of steering and focusing a beam of sound via selective coordination of the spatial distribution of phase angles between multiple sound emitters. Constrained by the principle of reciprocity, conventional phased arrays exhibit identical transmission and reception patterns which limit the scope of their operation. This work presents a controllable space–time acoustic phased array which breaks time-reversal symmetry, and enables phononic transition in both momentum and energy spaces. By leveraging a dynamic phase modulation, the proposed linear phased array is no longer bound by the acoustic reciprocity, and supports asymmetric transmission and reception patterns that can be tuned independently at multiple channels. A foundational framework is developed to characterize and interpret the emergent nonreciprocal phenomena and is later validated against benchmark numerical experiments. The new phased array selectively alters the directional and frequency content of the incident signal and imparts a frequency conversion between different wave fields, which is further analyzed as a function of the imposed modulation. The space–time acoustic phased array enables unprecedented control over sound waves in a variety of applications ranging from ultrasonic imaging to non-destructive testing and underwater SONAR telecommunication.

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Section: Numerical Validation and Methodsmentioning

confidence: 99%

Section: Nonreciprocal Behaviormentioning

confidence: 99%