This report presents the electric near fields of the trussed-whip, twin-whip, discone-cage, and bottom-fed fan shipboard hf antennas. It also discusses the importance of the electric near fields of...
Shipboard Antenna Pattern Inversion using Prony's Method. (2002)
Because far field antenna patterns can be expressed in terms of an exponential series of the spatial distribution of the source, they are candidates for Prony processing. Prony's method is used here...
File characteristics: computer program (1 file). Physical description: 1 computer disk; 3 1/2 in. System requirements: MS DOS. This report describes the principal algorithms used in the Super High...
Mini-Numerical Electromagnetic Code (MININEC). Version 3. (Computer Diskette). (2002)
File characteristics: computer program (10 files). Physical description: 1 computer disk; double density; 5 1/4 in. System requirements: IBM PC compatible; DOS; 360K. MININEC is a method of moments...
Calculated Near Fields of Navy HF Whip Antennas. (1998)
The hazards to personnel, ordnance, and fuel caused by shipboard hf radiators are determined. Numerical techniques are used to calculate the peak field intensities produced by 1-kW power input to...
A Method of Detecting Significant Sources of Intermodulation Interference. (1998)
Chase,W. M., Rockway,J. W., Salisbury,G. C.
An accurate knowledge of lowest orders is shown to be important for locating significant sources of intermodulation interference signals. A practical, reliable method is presented for calculating the...
The New MININEC (Version 3). A Mini-Numerical Electromagnetic Code. (1998)
MININEC is a method of moments computer program for the analysis of thin wire antenna problems. MININEC uses a Galerkin procedure to solve for the wire currents using an integral equation formulation...
The New MININEC (Version 3): A Mini-Numerical Electromagnetic Code. (1998)
The Mini ELECTROMAGNETICS Code, or MININEC, is a method of Moments computer programs for analysis of thin wire antennas. A Galerkin procedure is applied to an electric field integral equation to...
Computer Code Validation in Electromagnetics. (1998)
Logan, J. C., Rockway, J. W., Li, S. T.
This is a discussion of some key elements and issues that contribute to a perception of the validity for an electromagnetic modeling code. A perception of validity implies that the user has...
Super High Frequency (SHF) Link Analysis Model (SLAM) for Nonsatellite Applications. (1998)
A point-to-point link analysis model has been developed for the Super High Frequency (SHF) Band. It was developed to evaluate ship-to-ship and ship-to-air links. The SHF Link Analysis Model (SLAM)...
While lack of channel and bandwidth availability is the most frequently expressed communications problem in Navy Battle Group (NBG) communications, there is a group of communication channels which is...
Parallel Processing Applied to Computational Electromagnetics. (1998)
Russell, L. C., Rockway, J. W.
This investigation applied parallel processing techniques to a computational electromagnetic code to see if high performance computing can improve the utility and efficiency of techniques used in...
Rockway, J. W., Logan, J. C., Deneris, C. A.
The principal goal of the Electromagnetic Compatibility (EMC) Project is to minimize exterior electromagnetic interference (EMI) problems during the life-cycle of Navy surface ships. An important...
Russell, L. C., Rockway, J. W.
This investigation applied advanced visualization techniques to an existing computational electromagnetic code. The goal was to demonstrate that high-performance visualization can improve the utility...
Application of Parallel Processing to a Surface Patch/Wire Junction EFIE Code, (1998)
Russell, L. C., Rockway, J. W.
A surface patch/wire junction EFIE method of moment algorithm, JUNCTION, developed by the University of Houston has been implemented in a transputer based parallel processing environment installed in...
Intermodulation Interference (IMI) Testing of Composite Materials. (1998)
Rockway, J. W., Logan, J. C., Schukantz, J. H., Danielson, T. A.
With the possibility of the large-scale use of graphite-bearing composites for topside structures and masts, some concern has been expressed as to whether these materials might be intermodulation...
Transient Scattering Response of an Airborne Target. (1998)
Schukantz, J. H., Jr., Tam, D. W., McGee, J. B., Koyama, L. B., Rockway, J. W.
The research team performed measurements in a bounded wave simulator to obtain the radar cross section (RCS) of a scale model of a particular airborne target. Measurements of the airborne target were...
Numerical Electromagnetic Engineering Design System (NEEDS 3.1) Workstation User's Manual. (1998)
Lam, J. C., Rockway, J. W., Russell, L. C., Wentworth, D. T.
This manual assists the user with the operation of the Numerical Electromagnetic (EM) Engineering Design System (NEEDS 3.1). The Numerical Electromagnetic Code - Method of Moments (NEC-MoM), Version...
Lam, J. C., Rockway, J. W., Russell, L. C., Wentworth, D. T.
This manual is a programmer's guide to the Numerical Electromagnetic Engineering Design System (NEEDS) Version 3.1 software program. NEEDS was developed to assist users of the Numerical...
Intermodulation Interference (IMI) Testing of Composite Materials. (1998)
Rockway, J. W., Logan, J. C., Schukantz, J. H., Danielson, T. A.
With the possibility of the large scale use of graphite bearing composites for topside structures and masts, some concern has been expressed as to whether these materials might be intermodulation...
Dipole and Monopole Antenna Gain and Effective Area for Communication Formulas (1998)
A comparison involving antenna measurements and performance predictions has sometimes revealed a 6-dB discrepancy between the ground wave transmission measurements and the corresponding calculations....
Link Analysis of Shipboard SATCOM Phased-Array Antennas. (1998)
Major, R. W., Rockway, J. W., Welch, R. E., Donich, P. E.
This report is submitted in partial fulfillment of required deliverables in support of the Multimission, Multifunction Broadband Antenna (MMBA) project funded by Space and Naval Warfare Systems...
Thin-Wire Modeling Techniques Applied to Antenna Analysis. (1998)
This document is a summary of work performed in applying thin-wire modeling techniques in support of antenna analysis at NELC during FY74. Detailed discussion is limited to aspects which show how...