Ultrabeam - competition for SteppIr?

It appears, that the famous SteppIr antennas have competition. The principle of SteppIr and Ultrabeam is the same - the length of the element can be changed by the controller. The element is formed by a beryllium-copper strip, which is retracted or retracted from the magazine by a stepper motor. The amount of protrusion determines the resonant frequency. It is thus possible to precisely tune the antenna to the required frequency. Ultrabeam offers a different type of yagi antenna, it's a European producer, but the price is still quite high for our people. Web Ultrabeam.it