Design of RF and microwave amplifiers and oscillators

484 Pages·1999·19.04 MB·English

by  Pieter L. D. Abrie

-
I
I
I
I
S-rEH\Ar PTr E-rR-r\ 1r
I
t
I
CHARACTERIZATION AND ANALYSIS OF
I
I LINEAR CIRCUITS AT RF AND
I MICRowAVE FREQUENCIES
I
r.t rNrRoDUcrroN
I
I t o*-frequency circuits areu sually analyzedi n termso f transferf unctions.T his approach
| -'ldomu seda t RF andm icrowavef requenciesA. nalysisa t thesef requencieiss usually
I m termso f oneo f the many setso f single-frequencpya rameters.
I The parametersm ost frequentlyu seda re the y-, Z-, z-, ands -parametersT. he first
f fue setso f parametersr elate the terminal voltagesa nd currentsi n different ways, while
\ & $parametersa rec loselyr elatedt o thep oweri ncidentt o andr eflectedfr om a network.
I Becauseo f the relative easew ith which S-parametercsa n be measureda nd the
I :ul informationd irectlyo btainedf rom them,c omponentas reu suallyc haracterizebdy
I asuringtheirS-parameters,andc ircuits area nalyzedbyc alculatingth eir,g-parameters.
I fe otherp arametersa re often usedt o simpliff the computationsn ecessaryfo r circuit
- *i sisa nds ynthesis.
I
Each of theses etso f parametersw ill be consideredin detail in the following
I
'onsi,
I of the voltages,c urrents,o r power levelsi n a linear N-port networkc an be
f c{crilated in termso f the extemals ignals( independenvta riables)w heno neo f theses ets
I d perametersis known at the frequencyo f interest.C onversionb etweent he different
tracters is straightforward.
I
I
l, , '-'ARAMETERS
l
I
| , - i -pu*-eters of an.ly'-portn etwork are definedb y the expression
I
L v
( l . l )
)
.-ne
l
b