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Simultaion of the VCO phase noise

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hanen88

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Hi;

When i used both of Harmonic Balance and Phase noise controler, i display these curve as bellow:

However, the matter that i should determine the phase noise at 1MHZ or these simulation results prove that the curve finish in 100MHZ . I ask what can i do to obtain the lower value in 1 MHZ nad if some adjustement of the phase noise set up should done to obtain good results. I'm so gratefull to answer me.
Sincerly; noise.jpg
 

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hanen88 said:
Hi;

When i used both of Harmonic Balance and Phase noise controler, i display these curve as bellow:

However, the matter that i should determine the phase noise at 1MHZ or these simulation results prove that the curve finish in 100MHZ . I ask what can i do to obtain the lower value in 1 MHZ nad if some adjustement of the phase noise set up should done to obtain good results. I'm so gratefull to answer me.
Sincerly;View attachment 141441
Click to expand...

Increase the Noise Points in HB Noise Controller or HB Noise Tab. For instance, increase as " 5 Points per Decade" in Noise Controller.
 
Thank you i do it and i adjust the first NL noise start to 1HZ and the NL noise stop to 1MHZ. Finally, i obtained the desired curve .
 

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