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![]() "Jeff Liebermann" napisal w wiadomosci news ![]() On Sat, 2 Jun 2012 19:51:48 +0200, "Szczepan Bialek" wrote: The principle of nantenas is the same as the crystal radio. The size of the antenna must be below 1/2 WL. Please read the PDF I included. The length of the dipole can be any multiple of 1/2 wavelength. It can also be a loop antenna. What's critical is the spacing between the antenna and the underlying ground plane, which form a resonant cavity at optical frequencies. For RF each diode is O.K. Please read the Wikipedia article: The large loss in power is a result of the junction capacitance (also known as parasitic capacitance) found in p-n junction diodes and Schottky diodes, which can only operate effectively at frequencies less than 5 THz.[3] The ideal wavelengths of 0.4-1.6 um correspond to frequencies of approximately 190-750 THz, which is much larger than the capabilities of typical diodes. etc... This isn't going to work with ordinary diodes. RF = radio frequency. The question is if the electrons flow into the ground. Nope. The question is whether there are any electrons involved. There are none. "The simplest crystal radio receiver, employing an antenna and a demodulating diode (rectifier), is actually a rectenna - although it discards the DC component before sending the signal to the earphones. People living near strong radio transmitters would occasionally discover that with a long receiving antenna, they could get enough electric power to light a light bulb" Where the DC component is discard? What is the DC component made of? Do you know the answer? Yes... I know everything. If you unable to form a suitable opinion, I would be happy to supply one for you. Everyone constantly repeating that there are no electrons falling to the ground or spewn into the air doesn't seem to have much of an effect on you. You are also apparently incapable of answering my question (multiple times). I see no indication that you have read, much less understand, any of the references and explanations supplied for your benefit. You are therefore hopeless and a waste of time. "The electrical grid, which is normally three-phase AC, can be severely disrupted by the presence of a large DC bias. This is caused by strong solar flares hitting the Earth's atmosphere,(Even pipelines, such as the mostly above-groundAlaska Pipeline, are prone to this, and must be tied to electrical ground". Now you are only one. Two days ago Jimp wrote: "It has been explained to you several times that any electron emmission from the ends of an antenna is an abnormal situation, is NOT required for antenna operation, and is an independant phenomena of normal antenna operation." So we have done the first step: "electrons falling to the ground or spewn into the air" are the abnormal situations". The next step will be "L. Lorenz is right". S* |
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