| 词条 | Isotron |
| 释义 |
Isotron is the trade name for a shortwave antenna marketed by Bilal Co. for use as an amateur radio transmitting antenna for restricted spaces.[1] 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.{{citation needed|date=June 2013}} The bandwidth of the Isotron is quite narrow as compared with a dipole antenna. This is most pronounced on the lower frequency bands. References1. ^Ralph Bilal, Bilal Company website, 2011, Florissant, Colorado {{wireless-stub}} 2 : Radio frequency antenna types|Antennas (radio) |
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