Results 31 to 40 of about 185,099 (167)
A basic lock-in amplifier experiment for the undergraduate laboratory [PDF]
, 2003 We describe a basic experiment for the undergraduate laboratory that demonstrates aspects of both, the science and the art of precision electronic measurements. The essence of the experiment is to measure the resistance of a small length of brass-wire to
Black, E. D. +2 more
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Bragg reflection waveguide as a source of wavelength-multiplexed polarization-entangled photon pairs
, 2012 We put forward a new highly efficient source of paired photons entangled in polarization with an ultra-large bandwidth. The photons are generated by means of a conveniently designed spontaneous parametric down-conversion process in a semiconductor type ...
Abolghasem +33 more
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Ring-resonator-based wavelength filters [PDF]
, 2006 Microring resonators (MR) represent a class of filters with characteristics very similar to those of Fabry–Perot filters. However, they offer the advantage that the injected and reflected signals are separated in individual waveguides, and in addition ...
Driessen, A., Geuzebroek, D.H.
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IEEE AccessIn this paper, a two-path electric complementary coupling scheme is proposed for tunable bandpass filters (BPFs) with constant absolute bandwidth (ABW) and wide stopband.
Jiacheng Xie +3 more
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Residual Entropy of the Mott Insulator with No Symmetry Broken [PDF]
, 2012 The half-filled ground state of the Hubbard model on the hypercubic lattice in D dimensions is studied by the Kondo-lattice theory, which is none other than the 1/D expansion theory, but within the constrained Hilbert subspace where no symmetry is ...
ANDERSON, F. J. Ohkawa, Hubbard, Hubbard
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Tunable balanced bandpass filter with constant absolute bandwidth and high common mode suppression [PDF]
IET Microwaves, Antennas & Propagation, 2019 A reconfigurable balanced bandpass filter with constant absolute bandwidth (ABW) and high common‐mode (CM) suppression by using the interdigital coupling compensation circuit structure is presented here. The odd‐ and even‐mode equivalent circuits of the presented balanced bandpass filter are presented and analysed.
Kaijun Song +6 more
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374~747 MHz digital tunable microstrip filter
Tongxin xuebao, 2016 A novel digital microstrip tunable bandpass filter based on digitally tunable capacitor loading microstrip open ring resonators was proposed.The novel non-uniform open ring resonances with mixed coupling structure was used to make the coupling ...
Deng-yao TIAN +2 more
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FREQUENCY-TUNABLE BANDPASS FILTERS WITH CONSTANT ABSOLUTE BANDWIDTH AND IMPROVED LINEARITY
Progress In Electromagnetics Research Letters, 2012 This paper presents a frequency-tunable bandpass fllter with constant absolute bandwidth and improved linearity. The proposed resonator is composed of an open-ended transmission line with back-to-back varactor diodes loaded at one end. The back-to-back varactor diodes are used to enhance the linearity of the fllter, which is better than that of the ...
Feng Lin Yu, Xiu Yin Zhang, Yi Bin Zhang
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Quantum-limited time-frequency estimation through mode-selective photon measurement [PDF]
, 2018 By projecting onto complex optical mode profiles, it is possible to estimate arbitrarily small separations between objects with quantum-limited precision, free of uncertainty arising from overlapping intensity profiles. Here we extend these techniques to
Ansari, Vahid +7 more
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Tunable lumped-element bandpass filters with constant bandwidth
Известия высших учебных заведений России: Радиоэлектроника, 2015 Lumped-element bandpass filters using LC-tanks and immittance inverters are considered. Tuning of the central frequency is provided by using variable capacitors of LC-tanks and immittance inverters.
A. E. Baskakova +2 more
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