Can I choose M.Tech in Aerospace engineering after B.Tech in ECE???? Suggest me the names of some good colleges to do this course………..

Yes, you can choose M.Tech in Aerospace engineering after B.Tech in ECE. As you are B.Tech in ECE student it will be tough when you choose mtech as aeronautical. There will be lots of basic stuffs you need cover, as you have an electrical background you can pursue mtech in AVIONICS

For your reference here I am giving you the list of Top Avionics Engineering Colleges India:

Hindustan UniversityP.O. Box No. 1, Rajiv Gandhi Salai (OMR), Padur, (Via) Kelambakkam
Chennai, Tamil Nadu
Phone : (044) 27474262, 27474395
Fax : (044) 27474208

Indian Institute of Space Science and Technology (IIST)P.O. Valiamala
Thiruvananthapuram, Kerala
Phone : (0471) 2568462, 2564808, 2564809
Fax : (0471) 2568406

Shobhit UniversityNH- 58, Modipuram
Meerut, Uttar Pradesh
Phone : (0121) 2575091, 2575092, 2950279, 2950323
Mobile : 9810649492, 9319491700
Fax : (0121) 2575724

University of Petroleum and Energy StudiesBidholi Campus Office Energy Acres, P.O. Bidholi Via-Prem Nagar
Dehradun, Uttarakhand
Phone : (0135) 2776201, 2776061, 2776053 (Toll Free No. 1800-102-8737)
Fax : (0135) 2776090, 2694204