I agree with sonia but, after looking on the internet. You may find it easier to have your wife file in your country. Then you just need the application form filled for each visitor, 2 each 2x2 passport photos( not white background ), copy of your RP and Visa from your passport, 3 Months bank statements ( I hope you have been sending enough money to maintain a Balance ).
So after assembleing the documents, your wife will goto the Qatari Embassy, with her passport, documents, money for the fee and apply. Then they can have the visa placed directly into the passport.