/diy/ - Do It Yourself

>>795953
well, that is partly true. well mostly true.
all antennas start as pigtails. which is just a piece of wire exactly the length of one wave on the frequency you are trying to pick up.

but that's usually impractical so they use fractions of a wavelength. then you put up some waveguides which mostly reflect a rough range of signals you want, again by having wires in the same fractions of a length of the wave. then you have reflectors which direct the waves that go past the waveguides back onto the recieving element.

but with 2D printed antennas you can use all kinds of funny shapes. the point isnt to get a wire of a multiple of a 1/4 wavelength, but that happens to be something that resonates at that frequency. so if you can make a shape that also resonates at that freqency then that will work as well.

that board has multiple antennas so the filter and amplifying circuitry needs to get the signal those antennas receive to the receiving element synchronized so the signals arn't staggered. also, basic upper/lower pass filters.