A freeware dos program by John Agrelius released in early 90’s but still very actual.
![](https://i0.wp.com/www.iw5edi.com/wp-content/uploads/2020/04/Antenna_Maker_-_Ham_Radio_Library.jpg?resize=571%2C267)
It allows to quickly calculate dimensions for Quads antennas, Yagi antenna, Inverted vees antennas as well as J-poles and Traps to extend dipoles band coverage.
Just extract the antmaker.zip file and start the Menu.exe batch file.