نتایج جستجو برای: microwave technology

تعداد نتایج: 515497  

2017
John Henry April Cridland John Henry Lacy Jonathan Pinder José Verdú

We investigate theoretically the use of an electron in a Penning trap as a detector of single microwave photons. At the University of Sussex we are developing a chip Penning trap technology, designed to be integrated within quantum circuits. Microwave photons are guided into the trap and interact with the electron’s quantum cyclotronmotion. This is an electric dipole transition, where the near ...

Journal: :Current Problems in Diagnostic Radiology 2009

2006
J Roy Sambles Alastair P Hibbins Robert J Kelly James R Suckling Fuzi Yang

Using liquid crystals to control the propagation of microwaves is a potentially interesting technology. By incorporating small amounts of liquid crystal in thin slat metal structures through which the microwaves may resonantly pass a whole new range of voltage tuned microwave devices are becoming available. Metallic sub-wavelength slit structures at microwave frequencies have been constructed w...

2013

At the end of 2012, Ceragon Networks set a new benchmark for microwave communications by introducing the industry’s first multi-core microwave radio, FibeAir IP-20C. A part of Ceragon’s Holistic HetNet Hauling (3H) vision, multi-core radio architecture marks the beginning of a new era in wireless communications, boosting microwave to new levels of capacity heretofore reserved to fiber optic cab...

Journal: :Journal of peptide science : an official publication of the European Peptide Society 2006
Bernadett Bacsa Bimbisar Desai Gábor Dibó C Oliver Kappe

A rapid and efficient microwave-assisted solid-phase synthesis method is described for the preparation of the nonapeptide WDTVRISFK, using conventional Fmoc/Bu(t) orthogonal protection strategy. The synthesis protocol is based on the use of cycles of pulsed microwave irradiation with intermittent cooling of the reaction during the removal of the Fmoc protecting group and during the coupling. Th...

Journal: :Optics express 2010
Weiqi Xue Salvador Sales José Capmany Jesper Mørk

In this work we demonstrate for the first time, to the best of our knowledge, a continuously tunable 360 degrees microwave phase shifter spanning a microwave bandwidth of several tens of GHz (up to 40 GHz). The proposed device exploits the phenomenon of coherent population oscillations, enhanced by optical filtering, in combination with a regeneration stage realized by four-wave mixing effects....

2013
Yashumati R. Bhardwaj Monika Chauhan Ashutosh Pareek Dharma Kishore

Present work describes the synthesis of coumarin Mannich bases 4-7 by the application of Mannich reaction on 7-hydroxy-4-methyl coumarin 3 using conventional as well as microwave technology to compare the feasibility, reaction time and yield of the product. For this, 7-hydroxy-4-methyl coumarin 3 was prepared using Pechmann condensation reaction and Mannich bases (4-7) were synthesized by the r...

Journal: :Molecules 2010
Hong-Wu Wang Yan-Qing Liu Shou-Lian Wei Zi-Jun Yan Kuan Lu

Microwave-assisted hydrodistillation (MAHD) is an advanced hydrodistillation (HD) technique, in which a microwave oven is used in the extraction process. MAHD and HD methods have been compared and evaluated for their effectiveness in the isolation of essential oils from fresh mango (Mangifera indica L.) flowers. MAHD offers important advantages over HD in terms of energy savings and extraction ...

Journal: :IEEE Transactions on Microwave Theory and Techniques 2015

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