Inline fan

A line fan is used to ventilate a waveguide .

Depending on the climatic zone, moisture can penetrate the waveguide, which leads to the absorption of microwaves and thus to the attenuation of the transmitted signals. The problem arises particularly with feed lines to antennas in the open air, in which condensation water can form when cooling down .

A line fan supplies the inside of the waveguide with dry air and creates an overpressure that prevents moist air from entering the waveguide. In this process, both in-line fans with automatic desiccant regeneration and in-line fans, in which the desiccant has to be replaced after it is saturated, are used.

Web links

• A contribution by Telekom on the subject (PDF file; 1.19 MB) ( Memento from February 27, 2012 in the Internet Archive )