Results 161 to 170 of about 4,662 (208)

Chipless RFID Sensor for Measuring Time-Varying Electric Fields Using a Contactless Air-Filled Substrate-Integrated Waveguide Resonator. [PDF]

Sensors (Basel)
Amirkabiri A, Idoko D, Kordi B, Bridges GE.   +3 more
europepmc   +1 more source

Application of voltage controlled crystal oscillators to DC voltage reference validation. [PDF]

Eng Res Express
Spidell MT, Partain GW, Jaffe AG, White MG, Lehman JH.   +4 more
europepmc   +1 more source

Frequency reconfigurable PIN diode-based Reuleaux-triangle-shaped monopole antenna for UWB/Ku band applications. [PDF]

Sci Rep
Bayer Keskin SE, Koziel S, Szczepanski S.   +2 more
europepmc   +1 more source

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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
openaire   +2 more sources

Optically controlled varactor diode

Journal of Applied Physics, 1991
We describe the design and operating characteristics of an optically controlled varactor diode. Applications include optically controlled microwave elements and detection of optical signals in lightwave receivers. The structure consists of a p-n junction formed in an epitaxial layer of InP grown by metalorganic chemical vapor deposition on a semi ...
Chaochieh Tsai, Joe C. Campbell, Russell D. Dupuis   +2 more
openaire   +1 more source

Varactor diode measurements

Radio and Electronic Engineer, 1966
A comparison has been made of the ‘relative impedance’ and ‘transmission’ techniques of measuring the small-signal parameters of varactor diodes. Relative-impedance measurements have been made at u.h.f. and X-band and transmission measurements at X-band.
F.J. Hyde, S. Deval, C. Toker
openaire   +1 more source

Varactor diode series resistance†

International Journal of Electronics, 1973
Abstract Experimental work is described which indicates that in contrast with earlier evidence there is no significant frequency-dependence of the series loss resistance Rs of silicon varactor diodes in the u.h.f. band. The results were obtained from aeries—resonance measurements specifically made for determining Rs, and also of measurements in ...
S. H. AL-CHARCHAFCHI, F. J. HYDE
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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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Microwave Characterization of Varactor Diodes

IETE Journal of Research, 1970
A waveguide mount, which has a height equalling the separation of the internal planes of a varactor diode, has been used for characterization of varactor diodes by the transmission resonance method. The mount is connected to standard size waveguide by tapers on both sides.
W. S. Khokle, A. K. Ray
openaire   +1 more source