A tool to help ham radio, CB, and other radio users to create antennas of various types. Calculations available for dipole, vertical (1/8, 1/4, 3/8, 1/2, 5/8, 3/4, 7/8, and full wave), inverted vee, quad loop, delta loop, and yagi. Simply enter the frequency, select the antenna type, and all necessary calculations are displayed.