Topband: HEBA antenna

[Mike Fatchett W0MU]

What is the desired coverage area for the antenna?  I would expect it to 
be very small, local area coverage of 50 miles or so.  What is the take 
off angle etc.

W0MU Mike

On 4/19/2024 1:41 PM, Dave Cuthbert wrote:
> The HEBA appears to be the same animal as the CFA (Crossed Field Antenna)
> patented by Dr. Kabbary and M.C. Hately in the late 1980s. As the HEBA
> Model 103 Performance Analysis says, *" WWAS accomplished this feat of
> engineering through the development of a two-element antenna that generates
> the electric field and the magnetic field separately."* This is the idea of
> the CFA where separately generated E and H fields combine in space to
> overcome one or more limitations of conventional antennas.
>
> I thought the CFA was debunked by the time the last one was sold by Dr.
> Kabbary's Egyptian antenna company in 2003. Up to that time there were
> several articles in AntenneX magazine about the antenna along with attempts
> to build and test it. Dr. Kirk McDonald, a regular author for AntenneX,
> goes into the math in his paper *“Crossed-Field” and “EH” Antennas
> Including Radiation from the Feed Lines and Reflection from the Earth’s
> Surface.*
>
> My NEC models at the time for a CFA driven as a standard monopole against
> the Kabbary-recommended 2-story, copper strapped building showed it
> operating well enough as a standard monopole. The CFA on top of the
> two-story building formed a center-loaded monopole. I can build that model
> again and report back here if anyone is interested. I will compare them to
> the HEBA performance analysis.
>
> Sometime around 2002 an Australian ham/BC engineer worked with Dr. Kabbary
> to tune up a CFA at an AM broadcast station in Australia. After Kabbary
> give up and returned to Egypt the amateur retuned the antenna as a standard
> monopole that exceeded the measured field strength of the CFA tuning. To me
> and others the promise of the CFA for topband was a heady time which helped
> propel me more deeply into antenna design and analysis. The CFA turned out
> to be both a disappointment and a good lesson.
>
> *Wikipedia CFA article*
> https://en.wikipedia.org/wiki/Crossed_field_antenna
>
> * “Crossed-Field” and “EH” Antennas Including Radiation from the Feed Lines
> and Reflection from the Earth’s Surface*, Kirk McDonald, Princeton
> University
>   http://kirkmcd.princeton.edu/examples/crossedfield.pdf
>
> *HEBA Model 103 Performance Analysis*
> https://www.thebdr.net/wp-content/uploads/2020/06/high-efficiency-broadband-plain-english.pdf
>
>     Dave KH6AQ
>
> On Fri, Apr 19, 2024 at 6:01 AM Radio KH6O <radio.kh6o at gmail.com> wrote:
>
>> I'd like to see a version of this for 160M:
>>
>>
>> https://www.radioworld.com/news-and-business/headlines/wqvram-is-granted-cp-to-use-heba-antenna-at-night
>>
>> --
>> 73,
>> Jeff KH6O / 6
>> _________________
>> Searchable Archives: http://www.contesting.com/_topband - Topband
>> Reflector
>>
> _________________
> Searchable Archives: http://www.contesting.com/_topband - Topband Reflector