Wikipedia
Isotron
Isotron is the trade name for a shortwave antenna marketed by Bilal Co. for use as an amateur radio transmitting antenna for restricted spaces. It is physically short as compared to a dipole antenna for a given frequency. It consists of a coil placed between two angled sheet metal plates.
Usage examples of "isotron".
She has an isotron 80b antenna which she hangs out the window of the tower to use.
The Holland team also has an isotron 80b antenna and wire to make a big "beam" antenna if they get a place and the time.
The Holland team also has an isotron 80b antenna and wire to make a big “beam” antenna if they get a place and the time.