[time-nuts] Quadrifilar Helix Antenna

[David Kirkby]

On 10 June 2012 15:00, Jim Lux <jimlux at earthlink.net> wrote:
> On 6/9/12 6:50 PM, David Kirkby wrote:

>>> NEC will also do a patch: Model it as a grid of wires using the guideline
>>> of
>>> "surface area of wire is spacing between wires".. that is, if you have
>>> wires
>>> on a 1cm grid, then the wire diameter should be 1/pi cm.  Even if you
>>> thin
>>> the wires out (so you can get them closer to the ground plane), it still
>>> works pretty well.
>>
>>
>> I found a paper about that rule with NEC, and it basically showed it
>> was not a good of thumb. I just can't think where it is (what
>> computer, what directory).
>>
> funny.. the rule of thumb comes from Jerry Burke (one of the NEC authors)

But that in iteself does not make the rule right. I'll find the paper
one day and post it.