Ferrite Antenna Data
This article tells the story quite well. A real world example is the DX-160 receiver.
The ferrite antenna on the schematic. (T1 - T5)
That article also referred to a Small Magnetic Loop.
Here is the magnetic loop with an amplifier from the same article.No ferrite used here. If this one had a coil on the fet gate and it was equal the loop inductance it would be what the article refers to.