Rectenna (Rectifying Antenna)

rectifying antenna

Hi, I would like to discuss here about 'rectenna' - Rectifying Antenna. We will discuss the design & operation of a rectenna element as well as analysis and simulation with @nsoft and/or @DS.

rectenna schematic

Hi
Ok

Upload simple example of rectenna structure, Please

Thanks

rectenna

Hi
My project is about rectenna. If you have any question i may can help you.

rectifying antenna called a rectenna

Which design and simulation tool you have used for rectenna development? Which antenna you are using? How about efficiency? Sorry, too many question; because very few are interested in this topic. Thanks.

rectenna & ads & circuit

For rctifier circuit you can use schematic of ADS, considering about 200 MHz frequency shift upward. Antenna can be a patch and you can use the mumentom (layout of ADS) as i did. If you want to have high conversion efficiency the rectifier should be matched with antenna, to dsign such a matching circuit the optimizer of teh ADS is proposed.

hi myebook..

kindly guide me with more details reg a rectenna designing please.
am just a beginner. i've got the basic knowledge bout antennas.

now i need to design a rectenna.
tell me how to construct it practically pl

Hi,
you can search for RF-Harvesting or UWB Receiving/Detection...
K.

Hii,
I will do my project "RF harvesting". I will use this antenna for harvesting 2,4 GHz (from WiFi). My question is "Can I use log periodic antenna as antenna harvester, and I use rectifier to convert this this wave became dc voltage. Please give me some information about this.

Without going into it too deep, a few basic questions to ask people who worked on these projects:

The RF power received by the antenna normally are very weak.

How to rectify this weak R signal to get DC? There must be some sort of rectifying diodes after antenna then? If the RF signal is weak, it cannot even turn on the diode to function.

Chicken and egg thing???

hello guys , any references about rectenna please ...

Re: rectenna

hi
how to design a rectenna in ads software

Any reference books or papers that contain formulas for converting received EM wave into output voltage?

I think you all can google and find some papers on rectennas. In principle people believe that by connecting a rectifier to an antenna, they can harvest reasonable power over a distance.
They can but the results are not reasonable.
One big problem is that so far the rectifiers are detectors for RF up to microwaves, and RF detectors are designed to rectify low RF power, up to say 0 ..+10 dBm, with and output of 3V/ mW to an open load. if loaded with ~100 Ohms to generate some DC power, the result becomes poor, as the rectifier RF/DC efficiency is < 10 per cent in the best case.
High-power efficient RF/microwave detectors need only to be discovered.
As an antenna one can use a dipole or any other type, but connecting a detector/rectifier usually causes a heavy mismatch (also RF power-dependent), so most RF power is reflected back. Rather unreasonable efficiency is thus achieved only for a narrow RF input power range, and a light load.
Rectenna is then best if an array of antennas/rectifiers covers an area unto which the RF/microwave beam is pointed, and rectified DC outputs are summed.
So far the best results at UHF and microwave bands with good rectennas are only able to load a capacitor and discharge it into a LED, one blink a minute or so. A low-power microprocessor can be used as is done in some new sensors.
So far, much ado for almost nothing. Technically not reasonable efficiency. Go and invent a better RF/microwave rectifier first!

Any ideas on how to design the following circuit in CST Design studio? I have designed a simple patch antenna at 2.45 GHz but now wanna design the rectifier circuit of it.