All Questions
Tagged with software-defined-radio antenna-theory
6
questions
0
votes
1
answer
20
views
Questions about radio antennas
I need to know a few things about radio antennas.
As per the theory, the length of any antenna works best if it's length is exactly the same as the wavelength. With that said, if I need to build an ...
- 19
2
votes
1
answer
249
views
Link budget validation for a UHF satellite ground station
I built a UHF satellite ground station. It has a yagi with G=16.1dBi and an LNA with G=20.1dB. It’s a 430 - 450 LNA with NF=0.68. The RF cable, rg174/u has I think close to a 1dB/m, which would mean ...
5
votes
1
answer
346
views
Failing to detect Hydrogen line with 105cm dish
I've seen many examples of roughly 1 metre sized dishes being used w H+ sawbird and an SDR to detect and analyze Hydrogen line signal, and have been trying myself but can't seem to get anything beyond ...
- 51
2
votes
2
answers
851
views
What does antenna frequency range mean in practice?
I'm trying to wrap my head around software defined radios and antennas and noticed that lots of antennas are described in terms of a frequency range. For example, this one is described as operating ...
- 123
5
votes
3
answers
401
views
ARRL handbook as a reference for all your radio learning needs?
Looking to take up learning understanding everything from basic electronics to how today's wideband radios work, so that I can build my own radio systems (not just ham radios), and talk radio concepts ...
- 159
1
vote
1
answer
1k
views
SDR - discone antenna setup
Here's a picture of my SDR receiver setup...
This entire setup lives indoors as I'm not able to put anything up on the roof right now.
My understanding of a discone antenna is that the downward ...
- 165