Abstract
A frequency-domain method is presented for the numerical
steady-state analysis
of nonlinear
microwave circuits. Nonlinear elements are described with
Chebyshev expansions
or rational
functions of Chebyshev expansions and their response is
calculated directly in
the frequency
domain. Since no time-to-frequency conversions are
needed, the method is
especially suitable
for multi-tone problems which are difficult to solve with
harmonic-balance
methods.
Numerically stable recursive procedures allow the use of
high-degree expansions
for strongly
nonlinear devices. The analysis method is coupled with a
new measurement-based
modelling
approach, where the frequency-domain large-signal model
is directly constructed
through
integration from the measured small-signal y-parameters.
The resulting model is
inherently
consistent and allows an accurate representation of the
frequency-dependent
characteristics of
nonlinear devices. The analysis method and modelling
approach are
experimentally verified
by two- and three-tone measurements on a MESFET mixer.
Original language | English |
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Qualification | Doctor Degree |
Awarding Institution |
|
Award date | 9 Jul 1993 |
Place of Publication | Espoo |
Publisher | |
Print ISBNs | 951-38-4386-6 |
Publication status | Published - 1993 |
MoE publication type | G4 Doctoral dissertation (monograph) |
Keywords
- telecommunications
- microwave devices
- nonlinear systems
- numerical analysis