Results 31 to 40 of about 815,097 (318)
Ridge Gap Waveguide Based Liquid Crystal Phase Shifter
IEEE Access, 2020 In this paper, the gap waveguide technology is examined for packaging liquid crystal (LC) in tunable microwave devices. For this purpose, a line based passive phase shifter is designed and implemented in a ridge gap waveguide (RGW) topology and filled ...
Matthias Nickel +13 more
doaj +1 more source
Dispersive Fourier Transformation for Versatile Microwave Photonics Applications [PDF]
, 2014 : Dispersive Fourier transformation (DFT) maps the broadband spectrum of an ultrashort optical pulse into a time stretched waveform with its intensity profile mirroring the spectrum using chromatic dispersion.
Baraniuk +10 more
core +3 more sources
Wideband image-reject RF channelization based on soliton microcombs (invited paper)
APL Photonics, 2023 Wideband radio frequency (RF) channelization is essential for the reception and detection of cross-band RF signals in various applications, including communications, radar, and spectrum sensing. However, digital channelizers are inefficient at performing
Jiewen Ding +7 more
doaj +1 more source
Microwave Liquid Crystal Technology
Crystals, 2018 Tunable Liquid Crystal (LC)-based microwave components are of increasing interest in academia and industry. Based on these components, numerous applications can be targeted such as tunable microwave filters and beam-steering antenna systems.
Holger Maune +5 more
doaj +1 more source
Reference frequencies comb generation for microwave photonics ADC with signal spectral-interval estimation [PDF]
ITM Web of Conferences, 2019 Formation of a reference frequency comb in a circuit comprising a highly stable continuous laser and an amplitude Mach- Zehnder modulator with two independent RF inputs working with large modulation index for use in a high-speed microwave photonics ADC ...
Kulagin Victor +4 more
doaj +1 more source
Passive Radar Imaging of Moving Targets Using WiFi Signals
Leida xuebao, 2015 In recent years, the wireless local networks are constructed rapidly and their coverage greatly increase. The passive radar imaging of moving targets using WiFi signals is studied in this paper, which may lead to wider applications of passive radars ...
Zhuang Xu-sheng +3 more
doaj +1 more source
Controlling phonons and photons at the wavelength-scale: silicon photonics meets silicon phononics [PDF]
, 2018 Radio-frequency communication systems have long used bulk- and surface-acoustic-wave devices supporting ultrasonic mechanical waves to manipulate and sense signals. These devices have greatly improved our ability to process microwaves by interfacing them
Baets, Roel +3 more
core +2 more sources
RF and Microwave Fractional Differentiator Based on Photonics [PDF]
IEEE Transactions on Circuits and Systems - II - Express Briefs, 2020 We report a photonic radio frequency (RF) fractional differentiator based on an integrated Kerr micro-comb source. The micro-comb source has a free spectral range (FSR) of 49 GHz, generating a large number of comb lines that serve as a high-performance ...
M. Tan +10 more
semanticscholar +1 more source
Photonics-Based Microwave Image-Reject Mixer
Photonics, 2018 Recent developments in photonics-based microwave image-reject mixers (IRMs) are reviewed with an emphasis on the pre-filtering method, which applies an optical or electrical filter to remove the undesired image, and the phase cancellation method, which ...
Dan Zhu, Shilong Pan
doaj +1 more source
Biology, 2021 A multiobjective optimization method for a dual-mode microwave applicator is proposed. Dual-modality means that microwaves are used apart from the treatment, and also for the monitoring of the microwave ablation intervention. (1) The use of computational
Carolin Hessinger +4 more
doaj +1 more source