U can get your blood relations for Six months visa under your sponsorship.

Submit the following to the immigration dept.
1. Your passport copies with photograph and Qatar ID copy.
2. Salry certificate and Approval letter from your company.
3. Your brother's passport copies and photograph

Type the application at immigation office (from typist) and stamp (revenue) of approx 220QR or more (please check).

And when ur brother arrives get some sweets for me (lol)

Good luck