Results 31 to 40 of about 472,445 (299)
Suppressing the spurious states of the centre of mass
, 2008 Following Dirac's ideas concerning the quantization of constrained systems, we suggest to replace the free centre of mass Hamiltonian H_{CM} by another operator which commutes with all the elements of the algebra generated via the commutation relations by H_{CM} and the constraints which fix the centre of mass position. We show that the new Hamiltonian
Dita, P., Micu, L.
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Design of a K-band frequency conversion module
Dianzi Jishu YingyongIn this article, a K-band frequency conversion module is designed, which includes up and down conversion channels to achieve frequency conversion between K-band RF signals and intermediate frequency signals.
Gu Jiangchuan, Liu Yuankun, Hu Yue
doaj +1 more source
Stable and Low-Spurs Optoelectronic Oscillators: A Review
Applied Sciences, 2018 An optoelectronic oscillator (OEO) is an optoelectronic hybrid oscillator which utilizes ultra-low-loss fiber as an electro-magnetic energy storage element, overcoming the limits of traditional microwave oscillators in phase noise performance.
Anni Liu, Jian Dai, Kun Xu
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IEEE Photonics JournalIn microwave photonic frequency synthesis, pulse-repetition-rate multiplication (PRRM) mitigates photodetection saturation of optical frequency combs (OFCs), yet spurious-tone suppression is seldom quantified, especially at high frequencies. We present a
Hao Zhang +5 more
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A Suppressing Method for Spur Caused by Amplitude Quantization in DDS
IEEE Access, 2019 Direct digital synthesis (DDS) technology is widely used in navigation, communications, aerospace, and other fields. Due to the technical limitations in the process of DDS digitization, the output spectrum of DDS is inevitably spurious.
Sheng Tang, Changlong Li, Yuqing Hou
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Advanced Engineering Materials, EarlyView.Building machine‐readable vocabularies for materials science is slow, expert‐driven work. This study benchmarks 13 large language models on two of its first steps: finding candidate terms in engineering articles and deciding where they belong in a class hierarchy.
Thomas Bjarsch +3 more
wiley +1 more source
IEEE Access, 2019 This paper presents a comprehensive study on a new family of slotted hemispherical resonators and their applications in waveguide bandpass filters (BPFs) to extend the spurious-free stopbands.
Jin Li, Kai-Dong Hong, Tao Yuan
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Optical Signature of Moiré Superlattices Formed by Twisted SrTiO3 Membranes
Advanced Functional Materials, EarlyView.We discover optical signatures from bonded interfaces in twisted SrTiO3 moiré superlattices, including low‐frequency Raman vibrational modes and strong second‐harmonic generation, consistent with strong interlayer coupling inferred from cross‐sectional electron microscopy and ab initio calculations. ABSTRACT Moiré superlattices formed at the interfaces
T. A. M. Ragib Shahriar +13 more
wiley +1 more source
Advanced Functional Materials, EarlyView.A scalable, solution‐processed WSe2/ZrO2‐x van der Waals heterostructure realizes a light‐induced field‐tunneling synapse (LIFTS) that activates exclusively under bright illumination, emulating the photopic adaptation of the human retina at the device level.
Kijeong Nam +10 more
wiley +1 more source
A SPURIOUS-POWER SUPPRESSION TECHNIQUE FOR DSP APPLICATIONS
International Journal of Engineering Technologies and Management Research, 2020 To assist a solution to the problem of the test environment spanning multiple platforms, this This report presents the arrangement examination and employments of a Spurious-Power Suppression Technique (SPST) which can essentially decrease the power dissipating of combinational VLSI diagrams for intuitive media/DSP purposes. The proposed SPST disengages
M.S. Gaikwad, Vishal Shivaji Bari
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