The program calculates the radiation patterns and gain for the following types of antennas used by Administrations and broadcasters for HF broadcasting:

1. Curtain antenna, half-wave dipole array, multi band, centre-fed, aperiodic reflector;
2. Curtain antenna, half-wave dipole array, dual band, centre-fed, tuned dipole reflector;
3. Curtain antenna, half-wave dipole array, dual band, end-fed, tuned dipole reflector;
4. Curtain antenna, half-wave dipole array, dual band, centre-fed, no reflector;
5. Tropical antenna, half-wave dipole array, centre-fed, no reflector;
6. Horizontal log-periodic;
7. Vertical log-periodic;
8. Rhombic antennas;
9. Quadrant antennas;
10. Cross dipole antennas;
11. Vertical monopoles

The theoretical approach used for the calculations is explained in details in Recommendation ITU-R BS.705-1, titled “HF transmitting and receiving antennas characteristics and diagrams.”

The real performance of antennas encountered in practice will deviate to a certain extent from their analytically calculated characteristics.  The above recommendation also gives information about this deviation on the basis of the results of a comprehensive sets of measurements carried out by various administrations using modern techniques.

Three-digit reference codes (100-999) are used for common used antenna to provide quick reference for administrations and broadcasters in identifying antennas during their HF schedule coordination.

• The program includes option for English, French and Spanish.

• Hardware requirements: IBM PC compatible.

• Software requirements: Windows 95/98/NT/2000/XP.

• Distribution media: A single installation file can be downloaded from the ITU web site.

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