Half dipole antenna app for iPhone and iPad

APP aims to help alleviate the problems associated with calculating whip antennas.
Whip antenna A simple vertical antenna. Because the shape is mostly whip shape, it is called. Short-wave and ultra-short-wave radio are the most commonly used antennas for mobile communication. Its length is generally about a quarter of the operating wavelength. In order to be easy to carry, its structure is mostly rod type, rod type or snake bone type and other types, which can be disassembled, telescopic or bent and folded. The main advantages are: simple structure, easy to use, full directional, good mobility, suitable for the use of radio stations in motion. Military walkie-talkie, radio car, tank radio and ship radio are equipped with a standard whip antenna.