adf antenna
Hi,
I'm an avionics engineer and i used to deal with ADF and other airborn avionics since 1997. The ADF uses 2 antennas, both of them is at the bottom of the fuselage one of them is called "loop antenna" wcich used to decide the direction of the signal and relay the output to a rotating goniometer that, in part, moves a pointer. The other is called "sense antenna" which is used to recieve the ground station audio signal and also to romve the amibguity.
I'm not sure now why you need your system to be digital , you can implement an analog system in a samall size too but you will put the reciver at any where in the fuslage with leaving a good place for the indicator at the dashbord.
any way, ill try to give you more details about the design of the ADF Circuits later on. Wish you to suply me with ur direct e-mail address, its much easier to contact you thier plus that im new here and i dont know how to manibulate this out. Im sure that we will figuer this out
good luck
goher