Recent content by Esquilo

Mine is an innovative project. Furthermore, in the microwave range, water molecules interact with microwaves. Having the beats at visible frequencies (20 Hz or 10 Hz) would allow me to see the level of pollution. Anyway, if you don't want to answer my initial question, then no problem, I'll see...

Yes, my goal is to examine the behavior of rainwater at different types of beat frequencies, and based on the presence of dissolved salts or metals, knowing how rainwater behaves—that is, if I transmit an electromagnetic frequency, how do the different concentrations of metals in the water...

@sophiecentaur No, my goal isn't that complex. I need it to create beats in a water tank and calculate how rainwater behaves as the beat's envelope frequency varies. That's all, so no navigator. As for directionality, patch antennas are best suited for arrays (which are already directional as a...

@renormalize yes, to have 5 degrees like lasers, I would need arrays with sides of many meters and therefore with many antennas also considering the frequency, but no, as already said, I will operate in the non-radiative near field (Fresnel) and therefore with the waves not yet propagating...

@sophiecentaur yes yes I already knew that the focal point of the array depends on the aperture of the array itself and on the wavelength, and I did the calculations for near field focusing and the Frasnel distance is around 50 and 70 cm away, but I don't understand what this has to do with the...

@sophiecentaur So, what antenna size is best for my purpose? I'm just missing this information, but I can't seem to find the right path. I believe the half-wave antenna will provide more stability, but I'm looking for your opinion, which is much more valuable.

I mean it would be desirable to have a very collimated and directional beam with the same directionality as a laser, but with that wavelength it would be difficult, that was just my guess

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...