Results 1 to 10 of about 19,714 (168)

Tunable-filter imaging of quasar fields at z~1. I. A cluster around MRC B0450-221 [PDF]

, 2000
Using a combination of multicolour broad- and narrow-band imaging techniques and follow-up spectroscopy, we have detected an overdensity of galaxies in the field of quasar MRC B0450-221, whose properties are consistent with a cluster at the quasar ...
Baker J. C., Bland-Hawthorn J., Bland-Hawthorn J., Bower R. G., Brinkmann W., Eales S. A., Ellis R. S., Fioc M., Hunstead R. W., Joanne C. Baker, Jordi Barr, Joss Bland-Hawthorn, Madau P., Malcolm N. Bremer, Ramana M. Athreya, Richard W. Hunstead, Saracco P., Smail I., Snellen I. A. G., Thimm G. J., Thompson   +20 more
core   +3 more sources

ECCCII-Based Current-Mode Universal Filter with Orthogonal Control of w_o and Q [PDF]

, 2014
This paper presents a new current-mode current-controlled four-input five-output universal filter employing one current-controlled current conveyor (CCCII), one electronically tunable CCCII and two grounded capacitors. The proposed configuration provides
Junnapiya, S., Khateb, F., Kumngern, M., Phasukkit, P., Tungjitkusolmun, S.   +4 more
core   +1 more source

High-extinction VIPA-based Brillouin spectroscopy of turbid biological media

, 2016
Brillouin microscopy has recently emerged as powerful technique to characterize the mechanical properties of biological tissue, cell and biomaterials.
Fiore, Antonio, Scarcelli, Giuliano, Shao, Peng, Yun, Seok Hyun, Zhang, Jitao   +4 more
core   +1 more source

Harnessing optical micro-combs for microwave photonics

, 2018
In the past decade, optical frequency combs generated by high-Q micro-resonators, or micro-combs, which feature compact device footprints, high energy efficiency, and high-repetition-rates in broad optical bandwidths, have led to a revolution in a wide ...
Chu, Sai Tak, Little, Brent E., Mitchell, Arnan, Morandotti, Roberto, Moss, David J., Moss, DJ (reprint author), Swinburne Univ Technol, Ctr Microphoton, Hawthorn, Vic 3122, Australia., Nguyen, Thach G., Wu, Jiayang, Xu, Xingyuan   +8 more
core   +1 more source

Quantum Transduction of Telecommunications-band Single Photons from a Quantum Dot by Frequency Upconversion

, 2011
The ability to transduce non-classical states of light from one wavelength to another is a requirement for integrating disparate quantum systems that take advantage of telecommunications-band photons for optical fiber transmission of quantum information ...
A Stintz, A Vandevender, AD Boozer, AJ Shields, BD Gerardot, C Langrock, C Santori, C Simon, C Zinoni, C Zinoni, E Knill, G Krauss, G Ribordy, GD Boyd, H Xu, I Marcikic, J Shah, JC Knight, JM Huang, K Srinivasan, Kartik Srinivasan, L Chanvillard, L Duan, L Ma, L Ma, Lijun Ma, M Albota, M Davanço, M Pelton, M Varnava, M Wallquist, Matthew T. Rakher, MD Eisaman, MM Fejer, O Kuzucu, Oliver Slattery, P Kok, P Michler, Q Zhang, RH Hadfield, RT Thew, S Olmschenk, S Strauf, S Tanzilli, T Chanelìere, Xiao Tang, Y-H Kim   +46 more
core   +1 more source

TUNABLE BANDPASS FILTER USING RF MEMS SWITCHES

IIUM Engineering Journal, 2010
A band pass tunable RF filter is proposed by using Radio Frequency (RF) Microelectro Mechanical Systems (MEMS). The tunability is obtained by using capacitive MEMS switches that can be tuned within the bandwidth of 3.6 GHz to 4.4 GHz. The performance of the filter depends on geometry and location and types of the MEMS switches.
openaire   +3 more sources

Accurate automatic tuning circuit for bipolar integrated filters [PDF]

, 1990
An accurate automatic tuning circuit for tuning the cutoff frequency and Q-factor of high-frequency bipolar filters is presented. The circuit is based on a voltage controlled quadrature oscillator (VCO).
Heij, Wim J.A. de, Hoen, Klaas, Seevinck, Evert   +2 more
core   +1 more source

Photonic RF and microwave reconfigurable filters and true time delays based on an integrated optical Kerr frequency comb source

, 2018
We demonstrate advanced transversal radio frequency (RF) and microwave functions based on a Kerr optical comb source generated by an integrated micro-ring resonator.
Chu, Sai T., Little, Brent E., Mitchell, Arnan, Morandotti, Roberto, Moss, David J., Nguyen, Thach G., Shoeiby, Mehrdad, Wu, Jiayang, Xu, Xingyuan   +8 more
core   +1 more source

Tunable Bandpass Filter With Independently Controllable Dual Passbands

IEEE Transactions on Microwave Theory and Techniques, 2013
This paper presents a two-pole dual-band tunable bandpass filter (BPF) with independently controllable dual passbands based on a novel tunable dual-mode resonator. This resonator principally comprises a λ/2 resonator and two varactor diodes. One varactor is placed at the center of the resonator to determine the dominant even-mode resonant frequency ...
Huang, Xiaoguo, Zhu, Lei, Feng, Quanyuan, Xiang, Qianyin, Jia, Dinghong   +4 more
openaire   +1 more source

Tunable Versatile High Input Impedance Voltage-Mode Universal Biquadratic Filter Based on DDCCs [PDF]

, 2012
A high input impedance voltage-mode universal biquadratic filter with three input terminals and seven output terminals is presented. The proposed circuit uses three differential difference current conveyors (DDCCs), four resistors and two grounded ...
Jiun-Wei Horng, To-Yao Chiu, Zih-Yang Jhao   +2 more
core   +1 more source