Antennas

GNU Radio
1

Hi everyone,

Apologies if this is slightly OT but I am new to gnu-radio, radio and
SDR.

I am interested in what people are doing for antennas, I was thinking
that some kind of modular antenna would be cool, basically an SMA
connector, some cable, a groundplane with a hole to slot the antenna
in to, you could then change the actual antenna piece for different
frequencies, no doubt I am missing something fundamental?

So my SDR has a frequency range of 300MHz - 3.8GHz, so you could have
20 pieces of thick wire (your antenna), each one a different length.

Thanks for looking.

Cheers
Richard

2

Kinda OT, but sure, what I use for most experiments is a handheld dipole
with telescoping elements, it can tune between about 80 and 400 MHz, for
everything else I use a simple 800MHz rubber duck, these work well
enough
for everything i’m doing.

Andrew

On Tue, Aug 27, 2013 at 9:06 PM, Richard Thornton
<[email protected]

3

On 08/27/2013 09:06 PM, Richard Thornton wrote:

So my SDR has a frequency range of 300MHz - 3.8GHz, so you could have
20 pieces of thick wire (your antenna), each one a different length.

Thanks for looking.

Cheers
Richard

THere are a number of antenna designs that are broadband.

The discone is the most classic, and there are Log-Periodic Dipole
Arrays, and log-spiral antennae, and a number.

You should probably exercise your google-fu and see what you might be
able to have a go at building yourself.

But, yes, having a “library” of 1/4-wave antenna stubs is one way of
doing it…