We are looking into the possibility of building a low budget horn antenna for detecting 21 cm hydrogen line radiation (~1420 MHz) and and possibly measuring its spectrum.

What are the types of parameters and specifications we should look for in an amplifier and filter that would be connected to the input dipole at the end of the horn?

  • $\begingroup$ I made a small adjustment to your question, have a look and double-check this is what you'd like to ask, thanks! and Welcome to Astronomy! $\endgroup$ – uhoh Jul 12 '19 at 6:40
  • $\begingroup$ What sort of receiver are you thinking about? $\endgroup$ – jstarek Jul 28 '19 at 20:12

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