Results 11 to 20 of about 26,377 (290)
Alexandria Engineering Journal, 2022 A 4 × 4 Butler Matrix (BM) without phase shifter is proposed to provide bandwidth enhancement and size reduction by removing a conventional 0 dB/90° crossover, two 0° phase shifters and two 45° phase shifters. Two proposed 3 dB/45° patch couplers replace
Nazleen Syahira Mohd Suhaimi +3 more
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Toward Higher Integration Density in Femtosecond-Laser-Written Programmable Photonic Circuits
Micromachines, 2022 Programmability in femtosecond-laser-written integrated circuits is commonly achieved with the implementation of thermal phase shifters. Recent work has shown how such phase shifters display significantly reduced power dissipation and thermal crosstalk ...
Riccardo Albiero +5 more
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Adaptive Beamforming With Continuous/Discrete Phase Shifters via Convex Relaxation
IEEE Open Journal of Antennas and Propagation, 2022 Adaptive antenna array employing phase shifters only can reduce the hardware cost and power consumption, but the related optimization is well understood to be difficult to solve.
Yinman Lee
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Verification of Phase Shifter Measurements of a Reflective Array Antenna
Известия высших учебных заведений России: Радиоэлектроника, 2021 Introduction. Large-size phased antenna arrays (PAA) frequently incorporate optical excitation schemes, whose main elements include the feed and the reflective aperture. In turn, the reflective aperture consists of several tens of thousands of radiators
M. D. Parnes
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Column-row addressing of thermo-optic phase shifters for controlling large silicon photonic circuits [PDF]
, 2020 We demonstrate a time-multiplexed row-column addressing scheme to drive thermo-optic phase shifters in a silicon photonic circuit. By integrating a diode in series with the heater, we can connect $N \times M$ heaters in an matrix topology to $N$ row and $
Alves Júnior, Antônio Ribeiro +5 more
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Integrated research of the phase-shifting properties of a step structure of class II on connected transmission lines with mismatched loads [PDF]
Известия Саратовского университета. Новая серия: Физика, 2021 Background and Objectives: Fixed phase shifters on the transmission line are passive devices that provide a constant phase shift between the signals to the outputs of the reference and phase-shifting channels.
Korchagin, Alexey I. +5 more
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Design of microstrip microwave phase shifters for antenna arrays
Tekhnologiya i Konstruirovanie v Elektronnoi Apparature, 2017 The analysis of the features of microstrip discrete reflective phase shifters is given. The principle of forming multi-bit phase shifters based on the transmission-type phase shifter is presented.
E. M. Glushechenko
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Hybrid Beamforming for Large Antenna Arrays with Phase Shifter Selection [PDF]
, 2016 This paper proposes an asymptotically optimal hybrid beamforming solution for large antenna arrays by exploiting the properties of the singular vectors of the channel matrix. It is shown that the elements of the channel matrix with Rayleigh fading follow
Dianati, Mehrdad +2 more
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IEEE Photonics Journal, 2021 The optical-phased array (OPA) has gained special interest in recent years as a high-speed and compact imaging device. While large-scale OPAs have been demonstrated in single-pixel imaging, the complexity of the driver circuit is becoming a crucial ...
Samar Emara +6 more
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Millimeter-wave diode-grid phase shifters [PDF]
, 1988 Monolithic diode grids have been fabricated on 2-cm square gallium-arsenide wafers with 1600 Schottky-barrier varactor diodes. Shorted diodes are detected with a liquid-crystal technique, and the bad diodes are removed with an ultrasonic probe.
Chen, Howard Z. +5 more
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