SteppIR Communication Systems designed the HFT series Yagi antennas for demanding applications where reliability – both from extensive daily use and from the effects of seasonal weather conditions –  is critical.  The HFT series antennas are offered as full-sized straight element Yagis, specifically optimized for superior performance across the entire frequency range of each antenna. 

Yagi antennas are basically single frequency devices that work well only over a very narrow range, typically 0.5% change in frequency.  Fixed length Yagis compensate by using a variety of techniques, all of which result in serious degradation of performance, especially in Front to Rear rejection – and added complexity, size and weight.  Dipoles have a broader band-width but still cannot cover the entire frequency range while maintaining  a low SWR (<1.5:1).

Our patented solution offers a distinctive performance advantage – the RF conductor (antenna) resides inside non-metallic support structures, with the conductive strip mechanically adjusted via stepper motors to the exact length required at each individual frequency.  This is accomplished within a second or two, and the Yagi is optimized for performance specific to that frequency, with none of the signal degrading compromises that all such fixed-length antennas require- such as traps, interlacing or simply adding interactive elements.   The tuning is accomplished remotely via an electronic controller, from which custom computer models can be implemented into the operating system, if desired.

The HFT series antenna systems enjoy unequaled optimal performance on all frequencies within their specified frequency range, with performance characteristics that can be customized to the exacting requirements of the user.