Cascade Analysis Calculator (Active / Passive)
Enter gain, noise figure, P1dB, and IP3 to calculate cascaded system performance.
Note: P1dB and IP3 should be referenced to the output of each stage.
Formulas Used
Note: The calculations for Total P1dB and NF
use linear values
Cascade Analysis Calculator User Instructions
This RF/microwave system Cascade Analysis Calculator is an easy to use design analysis tool. But it does have a few entry boxes and dropdown menus that can take some time to familiarize yourself with. So, let’s take a stepbystep look at how to get your cascade analysis rolling.
 Start by choosing the number of stages. (Stage 1 = input stage and you can presume the system flows left to right.)
 Pick the corresponding component type from the dropdown menu. (This information is purely for your convenience and does not impact the calculation in any way.)
 The next parameter required is gain in dB. In keeping with standard conventions, use positive numbers to represent gain and negative numbers to represent loss. As an example, a 4 dB passive attenuator has a gain of 4.
 Next is noise figure, also in dB. By convention, this should always be a positive number, where the noise figure of a passive component is generally the opposite of its loss. Thus, the 4 dB passive attenuator above has a noise figure of 4.
 Finally, is IP3, which is also in dBm, and to be consistent with the choice in step 3.

Now move through each stage. Every time you enter a number, you will see the results in the "Output" section selfupdate.

When you’re done entering data, your system cascade analysis will be complete and ready for printing.

To start over, hit "Clear Values". This button will remove the values you entered from all stages.
Note: Pressing <Enter> will change field values from those entered. Use the Mouse to click into each field to enter new values. The calculation will be updated after each entry.
Disclaimer:
Qorvo makes no representations or warranties of any
kind, express or implied, about the completeness, accuracy, or
reliability of the tools on this web page. In no event will Qorvo
be liable to any user of these tools for any loss or damages,
including without limitation, indirect or consequential damages
arising out of or associated with the use of these tools.