Recent content by Esquilo

So, yes, as far as the angular range to operate is concerned, the desirable limit would be 5 degrees, but it's difficult to achieve. However, I would like to have a lot of directivity to operate in the Fresnel zone. As for the arrangement, the best one for mine is probably concentric, with the...

Good morning,@sophiecentaur I will use the same transmitter for all the cavity patches and I will vary the phases of all the antennas. I'm doing a lot of research and I think the best solution would be the half-wave antenna because it is more symmetrical. The quarter-wave antenna, having a...

@sophiecentaur Thanks for your reply. So, yes, the receiver question isn't very important at this point, since it can be made of a wide variety of materials. Yes, the beating will occur in the classic way, that is, through phase interference between multiple antennas. But going back to my...

@berkeman @.Scott @sophiecentaur @tech99 @renormalize Good morning, here I am again, I had created a new thread on the same topic but it was rightly deleted, so I have to continue here, yes so continuing on a theoretical level with my project, always considering a planar array with a side of 50...

@berkeman @.Scott Yes, I've checked more closely these past few hours, and the theremin solution is the most efficient. I'll definitely be thinking about using Huygens metasurfaces or similar superlenses that can overcome the diffraction limit. I don't know much about them yet, so I can't talk...

yes I should use maybe more than two receivers, I could make a system similar to metal detectors but it would be too difficult, and as berkerman said I would generate too many harmonics with the pulses, so I think my idea is too complicated for me to implement

57 and 47 dbm at 3 meters, yes you are actually right with square signals I have many harmonics and therefore a lot of noise I will have many filters I will see what to do

use a phased array for this very reason, to keep the signal in the Fresnel zone within a meter of the source and thus not interfere with the regulated bands, the pulse rises are pulsed and therefore rectangular, and the receiving system is a similar antenna, but I will pick it up with my hands...

[Post edited by a Mentor to remove accidental inclusion of the non-translated version of the below text] The system for detecting the signal is also an antenna as a receiver, the channel width must not exceed a quarter wavelength, my system is similar to the theremin but I would like there to...

800 MHz and 800.1 MHz are always two carriers, it's not the difference that interests me, I would just like to understand in which situation there is less interference using two beams, in the first case we have two beams with equal carriers and each different pulse, and in the second case we...

chose the 800 MHz frequencies because they are more manageable as a technology and also have a fairly wide half-wavelength of about 23 cm, so the areas to be focused are half the wavelength of the 800 MHz carrier, the application is musical and will not affect living beings in any way, I do not...

Thanks for your reply, using two carriers, one 800 MHz pulsed at 5 Hz pointing to one area and one 700 MHz pulsed at 8 Hz pointing to another area, if the two waves interfere in a space of a few centimetres I get the beating of the carriers (100 MHz) and the beating of the pulses (8,3,5,13 Hz)...

Good morning, I haven't been to the forum in a while and I've been having problems with my email. I hope everything is fine now. As per the title, I'd like to create pulses (5Hz - 8Hz) in specific regions of space. For example, 5Hz arrives in one area, and 8Hz is nearby. To create this effect...

Hi Mr. T, my problem came from the fact that according to the theory a capacitor accumulates only electrostatic (electrical) energy and in an rlc circuit, it discharges in an inductor, but if the inductor must transfer energy according to electromagnetic induction, how can the voltage of the...

yes thanks for the answer, ok I understand, so in an RLC circuit, in order for the inductor loaded by the capacitor to generate an electromagnetic induction which generates a variable voltage in the nearby conductors, the capacitor must have a lot of charge (Q) therefore a lot of voltage and...