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LNB for Total Power Radiometer

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raed_microwave

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Hi dears,

I'd like to design an LNB that can be used for Total power radiometer by connect the LNB with square-law detector and low-pass filter in series. The radiometer will be used to detect hot spots "high temperature". I need your help to find a way to simulate like this system. My problem starts that how can I find a model to realize a thermal noise source and connect this model to the input of LNB.
If you have an example will be very helpful for me.

Thanks in Advance
 

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