[TowerTalk] Vertical dipole other choices?

[jimlux]

On 10/20/20 1:21 PM, jimlux wrote:
> On 10/20/20 1:01 PM, David Gilbert wrote:
>>
>> Electrically, a half wave vertical dipole is not a lot different than 
>> a quarter wave vertical fed against radials or a counterpoise, but it 
>> requires a LOT more height to put it up.  I just modeled two different 
>> antennas in EZNEC+ as a comparison (both over medium ground):
> 
> 
> A lot of these antennas are an electrically short dipole. so they don't 
> require the height. From a gain standpoint, an infinitesimally small 
> dipole is 1.5 dBi and a full size dipole is 2.5 dBi (mostly from the 
> broader lobe for the short antenna).
> 
> 
> What might be interesting is modeling, say, a 25 foot dipole with the 
> center 13-14 feet off the ground.
> 
> 

Of course, one advantage of a full size vertical dipole is that the 
"center of radiation" is 1/4 wavelength from the ground. on 80m that 
puts it 65+ feet off the ground, and a horizontal dipole at that height 
would also perform fairly well, no?

I think that's going to be the dominant effect.