high Dielectric antenna

I have found some papers and a description on this topic, I am wondering if anyone has had experience for this use for mobile phone application. Any help/comments would be appreciated.

I think you are refering at what it is known as
"Dielectric Resonator Antenna". I am not sure
but for some 2.4 GHz where the size is small they
called chip antenna.

There is an antenna design house called "antenova" focuses on this HDA.
You can find out something from their website.
http://www.antenova.com/

a simple google search about Dielectric Resonator Antenna
will you a lot of information. There is a profesor
on UMiss who is a specialist on that. You will find
a book reference as well.

Do you have some detailed for ATC and HDA ? Thanks