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Load pull (incorrect results) vs load sweep (correct results)

Eyad A

Hello

Using ADEL, I am trying to find the optimum load impedance for a power amplifier with HB and a port adapter. I use two methods:

1.  Loadpull simulation:

I select a Loadpull simulation option in HB, and I get a certain value for Gamma_opt(mag, ang)  of the load for a maximum output power. To verify the result, I run a single point simulation using the same Gamma_opt but I get a different for the output power.

2. Variable sweep

I select a Sweep simulation option in HB using the same variables (mag,ang), and I get a  different value for Gamma_opt for a maximum output power. To verify, I run a single point simulation using the same Gamma_opt, and I get the correct result.

It seems to me that loadpull and sweep produce different  Gamma_opt and the maximum output power, where the latter looks like the correct one.

Is this a known issue in the loadpull analysis?

Is there anyway of plotting loadpull contours from HB analysis with swept variables?

With kind regards

-eyad

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