quadrifilar antenna simulations with ads

I am a beginner in microwave field. Now I get a work to simulate GPS (quadrifilar helix) antenna by HFSS/MATLAB but don't know how to begin.

Anyone has simulated or designed this kind of antenna? Could you send me your HFSS/MATLAB file? I guess I can learn a lot from your work.

Thanx a million!

E-mail: hyperocks@126.com

hi i can send but i want to know what grade are you?
tnx

Hi,
try this software: Antenna Magus - Antenna Design Software, click on "extensive database of antennas"

and may be try: Google Books and find: "quadrifilar helix" for example: first link, "Modern antenna design - page 264" link to book