CRLH leaky wave antenna query

I have made a structure based on CRLH and trying to make a Leaky wave antenna. As i simulated in HFSS i am getting a band of 29 Ghz to 34 Ghz but the problem is i m getting only a negative beam scanning which can be seen through the results i have attached. Is there any application for only negative scanning leaky wave antenna??

Does it mean that i m not getting the Parasitic effects in LH TL??

Not particularly, you could just turn it around and get forward scanning.

What does the dispersion show? In order to cover backwards and forwards raditiation, you need a mode that has both a positive and negative slope in the fast-wave region.