Dragoslav Dobricic, YU1AW
In WiFi communications, antennas with semicircular radiation diagram in horizontal
plane are often needed. Antennas with circular radiation diagram may have gain as high
as it is possible to narrow its vertical radiation diagram. That's where antennas with
radiation dipoles aligned vertically are used. When circular diagram is needed, and
vertical polarization is used, that alignment of half-wave dipoles can be carried out
according to the principle of the famous Franklin's antenna.
Open half wave dipol fed in the middle, is extended on both sides with one continuous
conductor, which is, every half wavelengths, folded in quarter-wave short-circuited part
of symmetrical two wire line. In this way, proper phasing of the half wave dipoles are
In WiFi communications, antennas with semicircular radiation diagram in horizontal
plane are often needed. Antennas with circular radiation diagram may have gain as high
as it is possible to narrow its vertical radiation diagram. That's where antennas with
radiation dipoles aligned vertically are used. When circular diagram is needed, and
vertical polarization is used, that alignment of half-wave dipoles can be carried out
according to the principle of the famous Franklin's antenna.
Open half wave dipol fed in the middle, is extended on both sides with one continuous
conductor, which is, every half wavelengths, folded in quarter-wave short-circuited part
of symmetrical two wire line. In this way, proper phasing of the half wave dipoles are