LTUNER is not necessary to analyze a simple IV Curves. BIASTEE component is sufficient.
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Then you should squeeze the V
GS voltage to obtain the right value.
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The first step to verify the fundamental parameters by drawing a test set-up. You can enter Optimum Load and Source Impedances directly into Port elements
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There are possibilities of discrepancy between measured data and model data. It's normal.
Now compare these results with datasheets' measured data.
I attach the project archive file you to inspire.
Hi Big Boss,
Thank you for sharing the AWR file. It was extremely helpful for a starter like myself.
I continued with the design and and had some more questions as below.
1. I plotted the Mu factor. My question is,
1.1] Do I plot the mu factor with only the bias network and no matching network?
1.2] My factor was above 1 from 760 to 870 MHz similar to that of the datasheet's design. But I wanted the mu factor to be above 1 from 500MHz to nearly 1GHz. So I added a series resistor. By doing so; the mu factor was above 1(not shown below) but when I plotted the input v output power graph, I got extremely low output power. So, how can I stabilize the FET beyond frequency of operation and still obtain good inputVouput power?
2.
I design an input matching network as shown below with the smith chart results. Port 2 is the Z source from the datasheet. From the smith chart, the matching looks good; is this correct?
3.
Similarly; I designed the output matching as well and the smith chart results. Again; I believe this is a good matching, right?
4. From my understanding; now, since, the input and output have been matched to 50 ohms with their respective source and load impedance from the datasheet.
So, I plotted the input power v output power graph again as shown below for the below circuit (the impedance is also written for clarification).
From the design file Big boss provided; I required 17.35dBm input to get 6W output. This was withOUT any input/output matching. And this was good. However, after performing the matching; the input requirement is now 26.76 dBm for 6W output. This increase in input power requirement, is it normal because of matching losses or did I do something wrong?
No matching
below is with matching
5. What are the next steps to be followed for me to continue the design? I know the layout comes next; but is there something else that I should take care of before moving to layout?
I have attached my AWR file; just in case you wanted to have a look at it. Unfortunately, it is not very pretty and clean!!
Thanks for your advise,