Antenna array design at 38 GHz

Hello
I'm willing to ask help about my senior project of doing an antenna array operating at 38 GHz.
How to chose parameters (substrate, feeding method, lengths, widths)

Thanks in advance i have 4 months to go need to start so soon.

Design An LNA For 38-GHz Radios
The link given below might help you.
http://www.mwrf.com/content/design-lna-38-ghz-radios

Thank you so much I will check it up! :D