Results 171 to 180 of about 9,744 (208)

High-sensitivity MOS varactor

Solid-State Electronics, 1986
Abstract A simple method of realizing high-sensitivity capacitors is proposed. The analysis of the new structure proposed and the experimental results on devices fabricated are presented.
P.R.S. Rao, K.N. Bhat, K.R. Rao
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Varactor-diode parametric amplifiers

Electronics and Power, 1964
The principles of parametric amplification are discussed. Amplifiers are distinguished from one another in terms of the allowed frequencies and of basic circuit connections. The small-signal and noise properties of varactor diodes are outlined and their effect on amplifier performance is demonstrated.
D.A. Bell, F.J. Hyde
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Design parameters for varactor frequency triplers using idealized punchthrough varactors

Proceedings of the IEEE, 1976
This letter gives the design parameters for a varactor frequency tripler using idealized punchthrough varactors. It is shown that there are many operating points that give approximately the same efficiency, and that the matching network will determine which one is chosen.
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High Performance Varactor

Advances in Science and Technology, 2010
A multi-components multi-layer co-fired ceramic varactor with superior performance is here presented. The concept combines a tunable capacitor with optimized properties in a restricted temperature range with PTCR layers to control the overall device temperature. Different prototypes are produced as demonstrator units; one of them is described in detail.
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Varactor Tuned Microwave Filters

MTT-S International Microwave Symposium Digest, 2005
The design and realization techniques of varactor tuned microwave filters are presented. Novel filter circuits are used and these are realized using Suspended Substrate Stipline. Experimental devices exhibit broad tuning bandwidths and low dissipation loss. Both bandpass and band-stop filters are described.
I.C. Hunter, J.D. Rhodes
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Nonlinear effects in varactor-tuned resonators

IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control, 2004
This paper describes the effects of RF power level on the performance of varactor-tuned resonator circuits. A variety of topologies are considered, including series and parallel resonators operating in both unbalanced and balanced modes. As these resonators were designed to produce oscillators with minimum phase noise, the initial small signal ...
Jeremy, Everard, Liang, Zhou
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Gallium arsenide varactor diodes

Radio and Electronic Engineer, 1966
From consideration of the factors influencing the design of varactor diodes for use in high-frequency parametric amplifiers and multipliers it appears that GaAs is the most suitable choice of semiconductor. The high carrier mobility of this material over a wide range of temperatures should enable high cut-off frequency varactor diodes tobe fabricated ...
C.A.P. Foxell, K. Wilson
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Analog varactor phase shifter

2017 Progress In Electromagnetics Research Symposium - Spring (PIERS), 2017
The paper presents a novel design of analog phase shifter based on varactor-tuned reflective loads. Each device's reflective load comprises two microstrip stubs with varactor diode, where the stubs are connected in a specific way for average losses and transmission ripple minimization.
Artem Vilenskiy, Mikhail Makurin
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Varactor tunable helical antenna

2nd European Conference on Antennas and Propagation (EuCAP 2007), 2007
In this paper, a varactor tunable helical antenna for DVB-H (Digital Video Broadcasting for Handheld devices) at 470 - 702 MHz is presented. The frequency tuning is implemented by using a varactor which capacitance value is changed with a reverse bias voltage. The varactor is placed as a series component to the feed of the helical antenna.
M. Sonkki, M. Berg, J. Pihlaja, S. Karhu, H. Jantunin, E. Salonen   +5 more
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GALLIUM ARSENIDE VARACTOR DIODES

1963
Abstract : Emphasis was placed on fabricating very high cutoff frequency diodes having breakdown voltages in excess of 6 v. Devices were fabricated using both melt-grown GaAs and epitaxial material. The results indicate that the highest cutoff frequencies were achieved using melt grown GaAs and that the best devices fabricated have cutoff frequencies ...
G. A. Kupsky, H. Kressel
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