Hi. On my hi-fi, I have the standard 'T' shape folded dipole antenna, which uses a smaller version of coax plug.
On other receivers, I've seen just a simple single-wire extending from the set.
However, while shopping recently, I noticed that several Hi-Fi's use a new FM antenna design - a single flexible insulated wire almost 3m, roughly 2m900 measured against my arms.
What puzzles me is the end of all these monopoles have a small loop at the end, about 22-25mm diameter, made from same antenna wire.
My question is:
Does such a small loop serve any RF purpose, say 75 R impedance matching, or is it just an added convenience for hanging somewhere?
The plug ends of the three hi-fi's I saw all used miniature female (RF?) plugs, plugging in to a male socket, no shield.
I calculate the wire length to three-quarter wavelength of 98 MHz midpoint of FM BCB.
On other receivers, I've seen just a simple single-wire extending from the set.
However, while shopping recently, I noticed that several Hi-Fi's use a new FM antenna design - a single flexible insulated wire almost 3m, roughly 2m900 measured against my arms.
What puzzles me is the end of all these monopoles have a small loop at the end, about 22-25mm diameter, made from same antenna wire.
My question is:
Does such a small loop serve any RF purpose, say 75 R impedance matching, or is it just an added convenience for hanging somewhere?
The plug ends of the three hi-fi's I saw all used miniature female (RF?) plugs, plugging in to a male socket, no shield.
I calculate the wire length to three-quarter wavelength of 98 MHz midpoint of FM BCB.
