Re: ATU vs. Preamp vs. Active Antenna
The cross-sectional area of a loop sets how much flux it captures, the length round the periphery sets the losses.
A circle gives the best ratio. Losses are only important on transmit.
For reception, all you need to worry about is not losing too much area.
Circles don't have to be perfect.
A circle in self-supporting pipe comes into its own on receive if mounted on a rotator of some sort. It isn't so much as peaking the wanted signal because the peaks are broad and soft, it is being able to plant a sharp null on an unwanted signal that is very useful.
David
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Can't afford the volcanic island yet, but the plans for my monorail and the goons' uniforms are done
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