We are developing a 95 GHz, 200 W, wideband vacuum electronic amplifier based on a 20 kV, 120 mA electron beam. The serpentine circuit is fabricated by multilayer UV-LIGA using an embedded polymer monofilament, which produces an all-copper monolithic structure with beam tunnel. We also discuss extension of the technique to upper millimeter-wave circuits at 670 GHz.

INTRODUCTION While most of us have a general idea of distortion and know that it deteriorates the signal, it may be useful to re-state what is distortion. When a signal is processed through an electronic circuit, the output of the circuit often contains unwanted signals which were not part of the input. These unwanted output signal's frequency is usually related to the input signal's frequency....

I. A. Shelykh 1, , M. M. Glazov , D. D. Solnyshkov , N. G. Galkin, A. V. Kavokin, and G. Malpuech 1 LASMEA, UMR 6602 CNRS, Université Blaise-Pascal, 24, av des Landais, 63177 Aubière, France 2 St. Petersburg State Polytechnical University, 29, Polytekhnicheskaya, 195251 St-Petersburg, Russia 3 A.F. Ioffe Physico-Technical Institute, 26, Polytekhnicheskaya, St-Petersburg, Russia 4 Mordovian Stat...

Ultrashort light pulses are nowadays used for a wide range of applications including metrology, communications, spectroscopy, terahertz science, ophthalmology, and material processing. Given this great diversity, it is not surprising that the required pulse parameters such as pulse energy and duration, repetition rate and wavelength are spread over a huge region of the multidimensional paramete...

The requirements for high speed driver amplifiers present a tough challenge to circuit designers. The two key requirements are a very broad instantaneous bandwidth and very good phase linearity. Allied to the broad band requirement is the need for constant gain and output power with frequency. Achieving all of these simultaneously requires careful consideration and understanding of the issues i...

This project explores the design of a type of direct-conversion ADC called a Residue Amplifier Pipeline ADC. Direct-conversion ADCs are a class of ADCs that operate at very high speeds, because the input signal is converted to a digital value in a single iteration. Other types of ADCs require many comparison iterations to convert the signal, resulting in much slower conversion times. This desig...

— We perform the exact numerical diagonalization of the Hamiltonians that describe both degenerate and nondegenerate parametric amplifiers, by exploiting the conservation laws pertaining each device. We clarify the conditions under which the parametric approximation holds, showing that the most relevant requirement is the coherence of the pump after the interaction, rather than its undepletion.

Pecuniary externalities have regained the interest of researchers as they seek policy interventions and regulations to remedy externality-induced distortions, e.g., balance sheet effects, amplifiers and fire sales. We show how bundling, exclusivity and additional markets internalize these pecuniary externalities; ex ante competition can achieve a constrained-efficient allocation. We cover a lar...