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Re: [Discuss-gnuradio] software controlled antenna

From: Angilberto Muniz Sb
Subject: Re: [Discuss-gnuradio] software controlled antenna
Date: Tue, 20 Dec 2005 18:55:35 -0800 (PST)

--- Robert McGwier <address@hidden> wrote:

> ...  I agree that a drawback is that
> in order to get 
> decent noise performance (low NF) the best solution
> is to put a preamp 
> on each element.  

Well we could experiment with the concept of ESPAR
(switched parasitic array antenna), where you have
just one receive chain conected to the main monopole
antenna e the other elements terminated on
DSP-controlled varactors to tune the array. The
classic concept is to perturb the varactors changing
the overal impedance of the array and so and so...


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