Dual band normal mode helix

Image of the Dual band normal mode helix.

The Dual band normal mode helix is the first antenna that has been added to Antenna Magus as a direct result of a customer request! The relatively short resonant length of this antenna and its simple construction, make it a popular choice for small handheld devices.

It can be designed for two operating bands, where the ratio of the upper to lower bands can vary from 2.0 to 2.7. Both the input impedance and the pattern are functions of the ground plane size for this antenna, so the design will have to be optimised with its operating environment taken into account.