DID YOU KNOW? DTIC has over 3.5 million final reports on DoD funded research, development, test, and evaluation activities available to our registered users. Click HERE
to register or log in.
THEORETICAL BANDWIDTH LIMITATIONS IN UHF PARAMETRIC AMPLIFIERS AND CONVERTERS,
STANFORD UNIV CA STANFORD ELECTRONICS LABS
Pagination or Media Count:
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
APPROVED FOR PUBLIC RELEASE