1. Diode Detector Notes:
You simulate the circuit with 2-port Data element and the capacitor to just find that the data is in and
that the circuit is functioning properly.
Then you add your detector circuit and simulate to get the graphs and find the Zin.(Add MLOC,
MLIN, MTEE and other blocks like Msub, Zin, S-parameters
You add the pads for your diode to be able to solder.
You don’t need the pads when you simulate the circuit using the 2-port Data element with measured
S- parameters. You need them when you do the layout for milling.
Also please refer to the previous tutorial provided on this.

2. Adding Zin block and MLIN, MLOC and MTEE
To make the circuit add
MLIN, MTEE, MLOC
Also add S parameter and MSub
blocks and Zin block to measure
Zin
To find Zin :
Go to Simulation-S_Param
and select [S] Zin block

3. Simulate your Circuit to find Zin
Make this circuit, simulate
it and look at the output
graph.
Zin block
Assuming that the
values to substitute are
calculated.

4. Simulate the circuit and look at the graph(Data Display)
Add the rectangular plot.
Then select “our_zin”
to plot from the Plot
Traces & Attributes
Click Add

5. Data Display Select Real part and click ok
Again select “our_zin” and click add. Now select Imaginary
part and click ok
Now click ok in the Plot window

6. The Zin Plot
This plot shows the real
and imaginary parts of Zin

7. Add markers at 2.4 GHz and 2.6 GHz on both the curves
This gives us the real and
imaginary values of the Zin
at both the frequencies.
Use these values to design your
single stub matching network
and also plot on the Smith
Chart.

8. Add your single-stub network to the circuit
Remove the
Termination and
add your single stub
and simulate

9. Data display after simulating
Now plot S(1,1) in dB
The curve should look like this.
You get the matching at the
frequency for which you
designed your single stub.
(2.6GHz) in this case.
You should get another curve
for 2.4GHz circuit

10. Replace the 2-port data element with the Diode and artwork
Assuming that
you know where
to find the diode
MBEND2 can be found
under Tlines_Microstrip

11. Click on the Layout and then Generate/Update Layout

12. Click OK on the message

13. This is the Layout with the Diode
To rotate the Layout:
Select the entire
Layout and then
rotate it using the
rotate button.

14. After rotating Ground for extra pin Read VDC here Cap Space Diode
Single Stub
Matching Network
Read VDC here
Cap Space
Diode
Ground
You can also plot without the single stub matching network

15. Layout without the Diode
Remember to put the holes for all the shorts(ground, short ckt.,
stubs, etc) when you mill the circuit