Hi, Badlok:
I checked it and it is Conjugate Match Efficiency (not gain). Howver, it means the same thing. It is not referencing to your chip's internal impedance. It is referencing to the antenna's input impedance.
From what I see, if your chip's internal impedance is 16-j380. You should try to optimize your antenna's input impedance to 16+j380. Then, you simulate your structure again. You can just use 50-ohm for the Zc of your port.
You will get 3 efficiency values while you display the pattern properties:
1. Radiation Efficiency
2. Antenna Efficiency
3. Conjugate Match Efficiency.
Basically,
Radiation_Efficiency = Radiated_Power / Net_Input_Power
Antenna_Efficiency = Radiated_Power / Incident_Power_50_Ohms
Conjugate_Match_Efficiency = Radiated_Power / ( Net_Input_Power + Power_consumed_in_source)
where
Net_Input_Power = Incident_Power_50_ohms - Reflected_power_50_ohms
At conjugate match, Power_consumed_in_source = Net_Input_Power (assuming Z_source = Conj( Z_antenna)). Therefore, Conjugate_Match_Efficiency = 50% of Radiation Efficiency.
On PATTERNVIEW of IE3D, we provide GAIN value. If you want to know the best gain you can achieve on your antenna, you should calculate it as:
GAIN_CONJUGATE_MATCH = GAIN * CONJUGATE_MATCH_EFFICIENCY / ANTENNA_EFFICIENCY (everything is in linear scale, not dB).
Best regards,
Regards.