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Re: [TowerTalk] HFTA disc....

To: "'jimlux'" <jimlux@earthlink.net>, <towertalk@contesting.com>
Subject: Re: [TowerTalk] HFTA disc....
From: "Hardy Landskov" <n7rt@cox.net>
Date: Fri, 15 Jul 2016 15:14:58 -0400
List-post: <towertalk@contesting.com">mailto:towertalk@contesting.com>
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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