Can a rectenna system recycle modulated 0 Hz to 100 Hz ambiant rf and microwaves and how big would it have to be to keep a house clean of rf and microwave pollution?

Answer 1

School's in. Ring the bell. First, let's jump around spotlighting the elements of the question so we understand them all. The rectenna (rectifying antenna) is a device that is really good at converting microwaves to DC. It's highly frequency sensitive and directionally sensitive. That means it only works on one frequency (or an extremely narrow range of frequencies) and rejects all others, and it's critical where the rectenna is pointed. The rectenna doesn't recycle, it converts. Antenna setups make the rectenna work even better. DC is, of course, direct current, like the uni-directional current flow from a battery. Microwaves are electromagnetic waves of really high frequency. Radio frequency (rf) waves are lower frequency than microwaves. Ambient rf (radio frequency) and microwaves are the rf and microwaves that we are bathed in every day. They're like the electromagnetic equivalent of air pollution. Sources are cell phone energies (both from the cell hub transmitters and the phones themselves), leakage from microwave ovens, the microwave energy beamed down from space, signals from radar, energy from imaging equipment,.... There's a lot of sources. And of extreme importance is that the pollution covers a wide range of frequencies. Modulated 0 Hz to 100 Hz waves are nowhere close to rf, let along microwave frequencies. They're like, bottom of the electromagnetic spectrum, and rf and microwaves are close to the top. Modulation can be simply described as the "adding of information to" a signal. Modulating a wave is adding information or intelligence to a carrier wave. We've covered everything in the question. Now to the answer. A rectenna system cannot keep a house clear of rf and or microwave pollution. The pollution comes in at many different frequencies, and the rectenna is highly frequency sensitive to a tiny range of microwave frequencies. And the pollution comes in through all the walls, doors and windows. A rectenna cannot even clear a house of all the signals on the frequency at which it is tuned (owing to scattering of the electromagnetic energy), even if it is pointed at the source. And no matter how big the antenna. A modestly useful analogy would be trying to completely darken the inside of an all-glass house on a bright day. Light is electromagnetic energy like microwaves and rf, but of even higher frequency. All-glass here because microwaves go through walls and roofs, and we need our analogy to work sorta like them. If we approached our "darkening" project by just using light absorbing materials all around the house in the different rooms, we'd be largely unsuccessful. It would be better to just coat all of the outside (including all windows) with a thick layer of paint. Everything. All of it. Because any window or even a large crack will let in light. Nothing inside a house will "keep a house clean of rf and microwave pollution" regardless of the cleverness of the inventor. Want to keep out microwave pollution? Cover your entire house top to bottom in a seamless sheet of aluminum foil. That'll work. As an aside, the 60 Hz AC energy on the power grid is hooked up to your house. Your house is bathed in fields generated by 60 cps AC. All day. Everyday. (And you doubtless grew up bathed in these fields.) The field strength of the 60 cps energy is probably as high if not higher than the field strength of ambient microwaves. This for dense urban areas. If you live in the suburbs or rural area, the 60 cps electromagnetic bath you are living in represents a far higher "dose" of electromagnetic energy than you'll be getting from cell phone transmitters. And it has done nothing to negatively affect your health. To now. Ignorance was bliss.