[Antennaware] Fw: 2-element delta loop array close to ground

[K0SN]

> I have not modeled a 2 element delta, but I have found
> that in the single element version, a right triangle configuration
> (90 degree angle at apex, 2  45's in the bottom corners) is
> much more directive broadside to the loop than is an
> equilateral triangle configuration. The far field azimuthal plot of
> an equilateral one looks about like a vertical, whereas the
> right triangle's pattern looks more like an EDZ, sort of a peanut
> shape. If I remember correctly, it's about 4 db. better broadside
> than off the ends.
> 73
> Tom K0SN
> Porterfield, WI.
>
> ----- Original Message ----- 
> From: "Pete Smith" <n4zr at contesting.com>
> To: <antennaware at contesting.com>
> Sent: Friday, November 28, 2008 8:55 AM
> Subject: [Antennaware] 2-element delta loop array close to ground
>
>
>>I am modeling a 20M 2-element delta loop array with the apex up, 12-foot
>> spacing and the bottom about 35 feet above ground, fed at a lower corner,
>> using Multi-NEC and NEC2.  In driven/reflector configuration, it looks
>> about like what I'd expect - 6 dBi gain and 14-18 dB F/B.  But in the
>> driven/director configuration, there isn't much directivity at all,
>> regardless of frequency.
>>
>> Does this square with others' experience, or am I messing something up in
>> the model?
>>
>> 73, Pete N4ZR
>> the World Contest Station Database is back...
>> www.conteststations.com
>>
>>
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>