You don't necessarily need an antenna. you get good quality receiving by using a simple cable, too.
the lenght of the cable should be lambda or lamdba/2 or lambda/4 ... then you'll get the best results...
I always had my earlier car-hifi's connected to such a self-made antenna...

TeeMcBee
Mk2, # 080000143, 12+30 GB
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TeeMcBee
[orange]Mk2, # 080000143, 40+30 GB, Tuner, Peugeot stalk hookup</font color=orange>