The porting of a mainframe-dependent antenna modeling program (NEC-3) to a 32 bit personal computer
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Authors
Wright, James J.
Subjects
Antenna Modeling
Numerical Electromagnetics Code (NEC-3)
FORTRAN
Numerical Electromagnetics Code (NEC-3)
FORTRAN
Advisors
Adler, Richard W.
Date of Issue
1990-06
Date
March 1990
Publisher
Monterey, California. Naval Postgraduate School
Language
en_US
Abstract
The purpose of this thesis was to demonstrate the feasibility of porting a large mainframe-dependent scientific FORTRAN program, specifically the Numerical Electromagnetics Code (NEC-3) to a 32-bit personal computer. Two systems, an AST Premium 386/33 with both Intel 80387 and Weitek w3167 math co- processors and a Definicon DSI-780 using a Motorola 68020 CPU and 68881 math co- processor, were used with several 32-bit FORTRAN 77 compilers. Results show that when Nec-3 was promoted to full double precision, complete accuracy was maintained while suffering only a 12% increase in execution time over single precision. Testing also revealed that the double precision Weitek version is 30% faster than the 80387 version. Some small inaccuracies remain; however, the same results were obtained by both the Naval Postgraduate School mainframe's new IBM VS2 FORTRAN 77 compiler and the personal computer FORTRAN 77 compilers. This indicates that the bug is in the NEC-3 code, vice being hardware or FORTRAN 77 compiler problem.
Type
Thesis
Description
Series/Report No
Department
Electrical Engineering
Organization
Naval Postgraduate School (U.S.)
Identifiers
NPS Report Number
Sponsors
Funding
Format
x, 87 p.
Citation
Distribution Statement
Approved for public release; distribution is unlimited.
Rights
This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.