Heard about CRLH leaky wave antennas? They are capable to radiate from backfire to endfire.
Prof. Christophe Caloz, École Polytechnique de Montreal, and Shulabh Gupta have been developped a new spectrogram analyzer which uses the unique properties of CRLH antennas.
This system is time and frequency independent and enables monitoring, in real-time, UWB signals. Then, it opens doors to faster and more reliable signal measurement and characterization.
This system is fully tested and characterized with a first prototype and we’re looking for an industrial partner interested in moving to commercialization. Interested?
Further info is also available on Flintbox…

Nahid said
please i need some documents about leaky wave antenna; if someone can help me he can contact me .
my Email is: sounabent@hotmail.com
thanks