On 17 Jul 2007 at 2:53, Adnan Yusuf wrote: > I am doing a project on sdr which will at the end require me to > demodulate an fm signal. My question is that for the fm range where can > i get an antenna and can i construct a rf front-end by myself, how if i > can?? please help me. I would be very grateful. > A dipole antenna is easily made with some wire and some 50 or 75 ohm coax to feed it. The formula for each side is 75/F. F is in MHz and the answer is in Meters. Are you talking about the FM broadcast band or narrow band FM on one of the public service bands or a ham band. The front end would require a mixer and a local oscillator, which could be a canned crystal oscillator. The thru-hole minicircuits mixers(such as the SBL-1) and a thru-hole oscillator are easy to wire on a piece of perf board.
Dave - WB6DHW <http://users.wildblue.net/wb6dhw>
