rf amplifier calculator

enter the value and click "calculate", the calculation result will be displayed.

Delta = S11 ⋅ S22 - S12 ⋅ S21
Rollet Stability Factor =[1 - |S11|2 - S22|2 + |Delta|2] / 2 × |S21| × |S12|

enter a value:

impedancezo:
ohms
frequency:
MHz
source impedance:
j
load impedance:
j
source l matching network:
  
load the l matching network:
  
s parameters:

S11:
S12:
S21:
S22:

calculation result:

roller stability coefficient:
maximum allowed gain:
Gain
maximum allowed gain:
Db
conjugate input reflection:
Polar
conjugate output reflection:
Polar
input impedance:
j
output impedance:
j

source l matches network components:

capacitance:
pf
inductance:
nH
Qs:

load the l matching network component:

capacitance:
pf
inductance:
nH
QL:
rf amplifier calculator

an rf amplifier is an electronic amplifier used to convert low-power radio frequency signals into larger signals, often used to drive transmitter antennas.

rowlett's stability coefficient (k) is known from john rowlett's 1962 ire paper on stability and linearity of two-port amplifiers with constant power gain.

in fact, the stability factor is a way of indicating whether you will run into problems. if k>1, the device will be unconditionally stable for any combination of source and load impedances. devices with k<1 may be unstable and may fail with certain combinations of source and load impedances.

the maximum allowable gain (mag) of the device is the situation when the wheel stability coefficient is greater than 1. the maximum gain allowed is the highest gain expected to be achieved by the conjugate matched amplifier.

a network is a network of two branches connected in series, with the free end connected to a pair of terminals; the terminal point and one free end connected to the other terminal. the disadvantage of l networks is that they have a fixed q, which is a function of the ratio of the two impedances to the matching resistive part. q is important because it determines network bandwidth.

the purpose of a matching network is to combine the required load and source impedances into the calculated load and source impedances they produce.
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