HFTA was written for horizontal polarization only.
Hardy N7RT
-----Original Message-----
From: TowerTalk [mailto:towertalk-bounces@contesting.com] On Behalf Of
jimlux
Sent: Friday, July 15, 2016 2:50 PM
To: towertalk@contesting.com
Subject: Re: [TowerTalk] HFTA disc....
On 7/15/16 11:18 AM, Richard Solomon wrote:
> I was wondering if HFTA would be
> of use if one had Vertical Antennas.
>
>> What I'd really like to see is a program like HFTA for vertically
>> polarized antennas. When I suggested it to Dean several years ago, he
>> told me that Parkinson's had begun some deterioration, so that he no
>> longer felt able to work at the needed level of detail. I've
>> suggested that project to another engineer with the math and antenna
chops to do it. We'll see.
>>
>>
The calculations for vertical polarization are much tougher to implement.
For H-pol, you can make the "soil is a nearly perfect reflector with 180
degree phase shift" assumption. For vertical pol, you can't.
The other thing is that for V-pol, the soil properties (resistivity,
permittivity) have a larger effect.
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