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positive phase noise

Andy Liu
I simulated the phase noise of an LC VCO. The phase noise at very low offset is positive. For example, the phase noise is +13.2 dBc/Hz at 100 Hz offset whilst the phase noise at 1 MHz offset is -100 dBc/Hz. The carrier frequency is 5 GHz. Should phase noise be negative? If the component at 5.0000001 GHz is 13.2 dB larger than that at 5.0000000 GHz, should be the carrier frequency be 5.0000001 GHz instead? If the phase noise at low offset is not simulated correctly, what is the limit of the offset? Thanks.
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