Hello I'm Kamalesh from India,I'm an undergraduate student I'm working on the project of converting Em waves that is RF to DC ....the converted RF will be used to power supply the sensors in a small amount... while I'm working on this project I'm facing lot of problems and I'm trying to solve it but still I'm can't slove many issues regarding this project example I don't have clear understanding about how to match the impedance for my antenna and how to choose the bandwidth and also I don't know how to make my circuit adapt for the variable frequency.Thank you....Can you help me?

 

Welcome to AAC.

Could you describe the actual application?
That is, where is the RF coming from?
Why is it being used as the power source instead of something else?
What are the power requirements? (voltage and current, or wattage)—an good faith try at an estimate is OK.

In the meantime, research the rectenna. This will lead you to a lot of important information.

 

Actually it's like charging the small electronic devices ...my aim is to capture and convert efficiently....and is it possible to collect the RF from the surrounding environment....if I'm wrong pls make me to choose the right path

 

It's one of those things that are possible but not really practical beyond a small set of applications.

https://semiengineering.com/the-limits-of-energy-harvesting/

“If you’re not burning a lot of energy, there is no need for energy harvesting,” Gert Jørgensen, senior vice president of sales and marketing for Delta’s ASIC Division. “And if you do burn a lot of energy, then energy harvesting will not work. Where we see this working is in the 10 milliwatt to 100 millwatt range, but a battery is still 20 times cheaper.