neazoi
Advanced Member level 6
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Hello in this page a polyakov mixer is shown **broken link removed** using switched (saturated) square loop toroical cores.
I would like to know how does it work?
In a typical diode polyakof mixer, the LO "opens" one of the diodes on the positive peak, and it opens the other diode on the negative peak. So that RF signal from the antenna is getting sampled and mixed twice each cycle of the LO. The resulting complex waveform has sum and difference frequencies of RF+2LO and RF-2LO, instead of a typical mixer that has RF+LO and RF-LO.
But my question is, how does it work with the cores? In other words, where are the "diodes" formed with the cores?
And why it coud not be done with a single core (not half the frequency then)?
I would like to know how does it work?
In a typical diode polyakof mixer, the LO "opens" one of the diodes on the positive peak, and it opens the other diode on the negative peak. So that RF signal from the antenna is getting sampled and mixed twice each cycle of the LO. The resulting complex waveform has sum and difference frequencies of RF+2LO and RF-2LO, instead of a typical mixer that has RF+LO and RF-LO.
But my question is, how does it work with the cores? In other words, where are the "diodes" formed with the cores?
And why it coud not be done with a single core (not half the frequency then)?
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