Today we studied about individual components of radio telescope and made list of necessary components to be bought.Here are some sites we visited.
http://www.astrosurf.com/luxorion/radioastronomy-rt.htm (this was a very useful site)
http://www.astrosurf.com/audine/English/result/scan.htm
http://en.wikipedia.org/wiki/Phase-locked_loop http://www.satcritics.com/sc_tech_lnb.pdf http://www.passmyexams.co.uk/GCSE/physics/earth-based-telescopes-radio-telescopes.html#top http://ipnpr.jpl.nasa.gov/progress_report2/XVI/XVIO.PDF http://www.ece.umd.edu/~tretter/commlab/c6713slides/ch5.pdf http://www.gb.nrao.edu/electronics/edir/edir214.pdf https://uspas.fnal.gov/materials/08UCSC/mml17_nonlinear_circuit_elements.pdf http://www.ras.ucalgary.ca/radiotel/frontend.html
As there may be doubts about components(as we had) all the websites that were quite useful are listed here.