Theoretical Bandwidth Limitations in UHF Parametric Amplifiers and Converters

Theoretical Bandwidth Limitations in UHF Parametric Amplifiers and Converters

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This work is devoted to finding the bandwidth or gain-bandwidth limits of parametric amplifiers and converters haeing a single linear-time-variant (LTV) element. The limits include the effects of all the important parasitic elements of the LTV device, such as lead inductance and series resistance. The limits are applicable to a wide variety of devices, including microwave crystal diodes, tunnel diodes, p-n junction capacitors, metal-oxide-salicon capacitors, many LTV inductors, and most other two-terminal LTV devices. The limits are found for lower- and upper-sideband converters and negative resistance amplifiers with fixed pump frequency; the bandwidth limits for the upper-sideband tunable converter are also derived. As a bonus, certain design criteria result from the formulation of the bandwidth limits; these criteria prove useful in the design of practical wideband converters and amplifiers. Several examples of wideband converter designs illustrate use of the design criteria; experimental results agree very well with the theoretical predictions. (Author).opt. with m = 7.80 , as given by Eq. (6.28). The normalized converter is now designed as in the previous subsection; its schematic diagram is given in Fig. 20. The 0.318 henry inductance in Fig. 20 may be separated into two parts a€” the O. I56anbsp;...

Title:Theoretical Bandwidth Limitations in UHF Parametric Amplifiers and Converters
Author: Paul Otto Scheibe, Stanford University. Stanford Electronics Laboratories
Publisher: - 1962

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