This java applet implements a simple yagi antenna modeling code.
The yagi antenna design is extensively used to increase the
directionality of an antenna. The antenna is easy to build since the
currents in the various elements are produced by mutual coupling to
the fields of the other elements and do not require each
each of the elements to be driven separately.
These so-called parasitic elements are
also commonly used on television antennas. This code was originally
developed
by one of us (KES) for distribution to the Amateur Radio Community.
For classroom use, this is primarily an illustrative tool,
but it is quantitatively accurate and therefore of
practical
relevance to any Amateur Radio operator who builds antennas.
A boundary element method is used to solve the boundary value problem
given by the antenna elements.
It is recommended that the user review the documentation provided
below the applet button and choose from some of the preselected antenna
designs to get an introduction to the applet capabilities.
Go to the Yagi Modeler Applet here.