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John S · November 6th 14, 04:08 PM posted to rec.radio.amateur.antenna

On 11/5/2014 7:16 PM, rickman wrote:
On 11/5/2014 7:28 PM, wrote:
I started to do some modeling on a short antenna for 160M and got what
I think are interesting results.

I will post those as soon as I get a chance to write up all the data.

All this stuff for short antenna is in the context of transmissions,
right? For receiving a short antenna is at a disadvantage, no? I seem
to recall a parameter called "effective height". For loop antenna it
pertains to the signal collected irrespective of the actual dimensions
of the loop. For other types of antenna I assume this is not the same
and does relate directly to the length of the antenna. Is that correct?

I ran a simulation to confirm that the received signal is some function
of the length of a wire antenna. My model was a 6 foot zero-loss wire 10
miles from the source with a load of 1000 ohms. The frequency is 1MHz.

Wire length Volts received
6' 0.001499
12' 0.005408

So, it appears that doubling the length of a short antenna captures
about 3.6 times the signal.

Is this what you wanted to know?