The Helicopter Antenna Radiation Prediction Code (HARP)
Abstract
The first nine months effort in the development of a user oriented computer code, referred to as the HARP code, for analyzing the radiation from helicopter antennas is described. The HARP code uses modern computer graphics to aid in the description and display of the helicopter geometry. At low frequencies the helicopter is modeled by polygonal plates, and the method of moments is used to compute the desired patterns. At high frequencies the helicopter is modeled by a composite ellipsoid and flat plates, and computations are made using the geometrical theory of diffraction. The HARP code will provide a user friendly interface, employing modern computer graphics, to aid the user to describe the helicopter geometry, select the method of computation, construct the desired high or low frequency model, and display the results.
 Publication:

Final Report Ohio State Univ
 Pub Date:
 August 1990
 Bibcode:
 1990osu..rept.....K
 Keywords:

 Antenna Radiation Patterns;
 Computation;
 Computer Graphics;
 Computer Programs;
 Flat Plates;
 Geometrical Theory Of Diffraction;
 Helicopters;
 Ellipsoids;
 High Frequencies;
 Low Frequencies;
 Method Of Moments;
 Communications and Radar