RF Front-End Cascade Analyzer
Cascade budget · Friis NF · IIP3/OIP3 · IIP2 · P1dB · SFDR · MDS · frequency plan · level diagram
System parameters
Chain preset
— current design —
WiFi 2.4 GHz RX front end
GPS L1 RX front end
Generic superhet RX
TX driver chain
RF input frequency (MHz)
Input signal power P
in
(dBm)
Channel bandwidth
Hz
kHz
MHz
GHz
Required SNR for detection (dB)
Temperature (K)
IP3 / IP2 / P1dB entry referred to
Output (OIP3 / OIP2 / OP1dB)
Input (IIP3 / IIP2 / IP1dB)
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Stages cascade top to bottom. Leave IP3 / IP2 / P1dB blank for an ideal (∞) stage. Passive types (filter, attenuator, switch, cable) track NF = loss until you type an NF. Mixer stages take an LO frequency and Σ/Δ mode for frequency planning.
Math: Friis NF; power-addition IIP3 (1/iip3 = Σ g
pre
/iip3
i
); coherent worst-case IIP2 (1/√iip2 = Σ √(g
pre
/iip2
i
)); output-referred P1dB; SFDR = ⅔(IIP3 − MDS).
Live tuning
Pin dBm
Stage
Gain dB
NF dB
OIP3 dBm
OP1dB dBm
Drag to retune the selected stage — table, cards and charts update live. IP sliders are output-referred.
Stage chain
#
On
Name
Type
Gain dB
NF dB
OIP3 dBm
OIP2 dBm
OP1dB dBm
LO MHz
Mode
+ Add stage
Frequency plan
Cascade build-up
Export CSV
Stage
f MHz
G cum
NF cum
IIP3 cum
OIP3 cum
IIP2 cum
OP1dB cum
Sig dBm
Noise dBm
Headroom
Noise %
IM3 %