The Yagi antenna is very usefull for concentration of the RF , either transmitted or received. As a receiver to maximise capture of what ever RF is up there. As a transmitter to direct the hard earned RF to where is is is needed, eg: inland , down a valley rather than out to sea or up a mountain. Can be combined in Bays to achieve abroad spread of power in a determined direction.
As usual all results: AS IS, no responsibility assumed.
A generic Yagi can be defined and analysed using the dimensions from the Rothammel tables.
A yagi is specified, then analysed. Up to 8 elements can be defined
A log yagi is specified and designed within the restrictions imposed on a seemingly scattering of wires.