Hi Mauro
Google search ttfd antenna returns About 3,390 results (0.68 seconds)
Here are a few links.

http://www.packetradio.com/t2fd.htm
http://hf-antenna.com/015/
https://en.wikipedia.org/wiki/T2FD_antenna
http://medxr.blogspot.com.mt/2015/02/the-tilted-terminated-folded-dipole.html

Happy antenna brewing.
Regards
Lawrence

On 3/19/16, Clemens Paul <[email protected]> wrote:
> Hi Mauro,
>
> I have no hands on experience with this antenna,
> but simulations by experts have shown that one should go for a ~900 Ohm
> termination resistor and at least 50m length if you want to keep losses
> acceptable (5dB) on 3.5MHz.
> I'll send you the article per PM.
>
> 73
> Clemens
> DL4RAJ
>
>
>
>>-----Original Message-----
>>From: [email protected]
>>[mailto:[email protected]] On Behalf Of IK1WVQ Mauro
>>Sent: Friday, March 18, 2016 6:13 PM
>>To: [email protected]
>>Subject: LF: O.T.: T2FD ANTENNA
>>
>>Hi to all,
>>
>>someone has experience about the T2FD (Tilted Terminated Folded
>>Dipole) antenna ?
>>
>>My need is a broadband antenna from 3.5 to 14Mhz WITHOUT any matching
>>unit (TX 2W max)...
>>I gladly accept to lose 30% power into the resistive termination, if
>>this is the bandwidth price !!
>>
>>73 de Mauro IK1WVQ
>>
>>
>
>
>