Electrical transmitter/receiver antenna for wireless radio, has circular capacitive emitter loop made from metal tube or metal flat material, where flat copper coils for different frequency ranges are integrated within center of emitter

摘要

The antenna has a circular capacitive emitter loop made from a metal tube or a metal flat material. Flat copper coils (3) for different frequency ranges are integrated within the center of the emitter. The diameter of the coils lies within the range of 0.005 to 0.02 of wavelength. A coaxial supply cable has a closed coaxial section (4) which functions as an electrical counterweight.