Recent content by lbminh2015

@Tom.G: Thank you so much for your very detailed explanation, and your time too. Now I understand what you mean and how I can improve my measurements as well as my explanation of the results I got.

Thank you for your interpretation. Does this mean that the measurements should be made very close to the antenna (about a wavelength ~ 38cm or less), and the measurement set up should be far away from reflecting surfaces to get accurate field measurements?

@Tom.G : Thank you very much for your time and your story as well :) That would be very useful to me. Could you please help me make clear some things in your comments: I thought it is the forward voltage drop of the diodes which is 150mV, which was included in my calculation? Yes you are...

@tech99 : Thank you very much for your comment. Yes the matching circuit has been designed with a shunt C of 5.6pF and a series L of 16nH. But in practice, any time I soldered these elements to my circuit, the 2-stage multiplier could not boost the input voltage to the desired voltage. It got...

@Tom.G : Thank you very much for your suggestion. Yes I think so, the ambient environment obviously accounted for the "sometimes". Most of the times I could get 1.8 VDC. Btw, the transistor was not there in my real set up. I have not tested it (for backscatting) yet. I have tested P110B-EVB...

Dear all, thank you very much for your comments. I'm sorry not having mentioned the details of what I'm doing. I'm doing exactly an RFID transponder at 915 MHz. The reader I'm using has the output power of 650mW. At the distance of 15-20cm where I got the result as mentioned above, the received...

I could not insert my image in the 1st post. Here is my result.

Dear all, I'm doing an RF energy harvesting circuit in UHF band. My question is about the voltage multiplier. My 2-stage multiplier (using 2 HSMS-285C diodes) follows Karthaus-Fischer's voltage-doubler. A 0.1F supercapacitor is put right at the output of the multiplier. This DC voltage will...