Hey guys,
I read some stuff about basic radio designs, and i know some electronic theory pretty good. Somebody i asked once told me that making RF waves in a circuit coupled to a grounded antenna will produce a potential between the antenna and the ground. This potential is then caught by the receiver, and inducted into the circuitry. This makes sense, but is it a necessary condition for an antenna to be grounded? I can think of things such as the wireless car lock button which seem to get the signal to the car without being attached to the ground. Can someone please help clarify this little aspect of radio circuits?
Thanks a lot!
I read some stuff about basic radio designs, and i know some electronic theory pretty good. Somebody i asked once told me that making RF waves in a circuit coupled to a grounded antenna will produce a potential between the antenna and the ground. This potential is then caught by the receiver, and inducted into the circuitry. This makes sense, but is it a necessary condition for an antenna to be grounded? I can think of things such as the wireless car lock button which seem to get the signal to the car without being attached to the ground. Can someone please help clarify this little aspect of radio circuits?
Thanks a lot!