The OWL (Optimised Wideband Low Impedance) is a native low impedance Yagi switched to a direct 50Ω fed Yagi by simply changing the split dipole to a folded dipole. So doing removes the by-products of matching devices (such as the generation of noise) while retaining the performance advantages of the lower impedance design. The OWL was first introduced by G0KSC who presented other associated benefits of the design which included closing the proximity of the first 3 to 4 elements which extended the usable bandwidth range of the OWL too.

The LFA (loop Fed Array) design by G0KSC is now in the 4th generation of development. The LFA family of Yagis were developed to give the urban/city user the ability to work DX by reducing received noise. The LFA Yagi employs a large, closed loop design which is grounded opposite the feed point of the antenna to help protect your transceiver against static build-up. Side lobe suppression is excellent too and thus many unwanted noise sources and ‘birdies’ are blocked as a result.

The LFA-Q is a quad antennas which is a little different from those usually seen. Rather than the use of thin wire, the LFA-Q employs large diameter tubes to form the elements with a boom running along the top and bottom of the array. A quad typically can achieve higher gain that the same length Yagi with similar bandwidths. However, some of these performance properties are lost by using thin wires. With the deployment of tubes, higher gain properties are retained along with increased bandwidth and like other G0KSC designs, the LFA-Q’s are direct 50Ω fed so no associated matching losses or restrictions.