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I am a new RF designer.
Now I got the LO and RF input reflection coefficient(or input impedance) using large signal simulation @ ADS. However, when I use Smith Chart to conjugate match this impedance to 50 Ohm. I find it's totally wrong. It is does not improve the reflection coefficient, but...
To Dsjomo and Mazz,
Thank you for answers. I have fixed my problem yesterday.
I am a new RF designer. I can only find books for how to do bias in LNA and amplifier. They only use resistor divider. Could you recommend some basic books about mixer bias?
Thank you every much.
Now I got the LO...
To Vfone,
I cannot open the link you posted.
Added after 23 minutes:
To Mazz,
The attachment is my schematic for Gilbert Mixer.
The DC working point is there.
Thanks
Karen
I am designing a Gilbert Mixer, and I use 3v to supply the power. I find my conversion gain is very low, about -20dB.
I use resistors for bias and use on-chip transformer for differential inputs of LO and RF.
Who can tell me how to improve the conversion gain? Thanks a lot.
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