Accession Number : ADA097415


Title :   Numerical Electromagnetic Code (NEC)-Reflector Antenna Code: Part II. Code Manual.


Descriptive Note : Technical rept.,


Corporate Author : OHIO STATE UNIV COLUMBUS ELECTROSCIENCE LAB


Personal Author(s) : Lee,S H ; Rudduck,R C


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a097415.pdf


Report Date : Sep 1979


Pagination or Media Count : 210


Abstract : The code manual documents a detailed explanation of the Numerical Electromagnetic code - Reflector Antenna Code by which the near field and far field of a typical Navy reflector antenna can be calculated. One important feature of the code is the capability for a general reflector rim shape. Another important feature is the capability to input a practically arbitrary volumetric feed pattern. Only the class of parabolic surfaces was implemented in the computer code. The theoretical approach for computing the fields of the general reflector is based on a combination of the Geometrical Theory of Diffraction (GTD) and Aperture Integration (AI) techniques. Typically, AI is used to compute the main beam and near sidelobes; GTD is used to compute the wide-angle sidelobes and the backlobes. The theoretical background on which the computer algorithms are based is described along with descriptions of the main program and the various subroutines. For each subsection of the main program and subroutine, the purpose and method are included, accompanied by a flow diagram, a key variable list and a listing of the code. (Author)


Descriptors :   *COMPUTER PROGRAM DOCUMENTATION , *COMPUTERIZED SIMULATION , *ANTENNAS , *ELECTROMAGNETIC WAVE REFLECTIONS , COMPUTER PROGRAMS , ALGORITHMS , ELECTROMAGNETIC FIELDS , NUMERICAL ANALYSIS , FAR FIELD , FORTRAN , COMPUTER GRAPHICS , USER NEEDS , TABLES(DATA) , FLOW CHARTING , ANTENNA RADIATION PATTERNS , NEAR FIELD , ULTRAHIGH FREQUENCY , ANTENNA APERTURES


Subject Categories : Computer Programming and Software
      Fluid Mechanics


Distribution Statement : APPROVED FOR PUBLIC RELEASE