Indoor DVB BiQuad TV UHF antenna
thingiverse
Here is a DVB antenna for digital television. It worked very well indoors for me, with a transmitter antenna 15km (9.3 miles) away broadcasting between 638 and 646MHz. It actually worked much better than a store bought antenna. If your broadcaster is transmitting at very different frequencies this might not work for you. Find a biquad dvb antenna calculator online and it will give you optimized antenna dimensions for your desired frequencies. Also, a normal antenna cable won't fit inside. I used a thin antenna cable I had laying around.
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