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  • 1
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    Mutual impedance between vertical dipoles over a flat earth (1979)
    American Geophysical Union
    Details
    Publication Date: 1979-11-01
    Print ISSN: 0048-6604
    Electronic ISSN: 1944-799X
    Topics: Geosciences , Physics
    Published by American Geophysical Union
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    PAPER CURRENT
  • 2
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    Near fields of a vector electric line source near the edge of a wedge (1979)
    American Geophysical Union
    Details
    Publication Date: 1979-05-01
    Print ISSN: 0048-6604
    Electronic ISSN: 1944-799X
    Topics: Geosciences , Physics
    Published by American Geophysical Union
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    PAPER CURRENT
  • 3
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    Dielectric coated wire antennas (1976)
    American Geophysical Union
    Details
    Publication Date: 1976-01-01
    Print ISSN: 0048-6604
    Electronic ISSN: 1944-799X
    Topics: Geosciences , Physics
    Published by American Geophysical Union
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    PAPER CURRENT
  • 4
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    X-Antenna: A graphical interface for antenna analysis codes (1995)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: This report serves as the user's manual for the X-Antenna code. X-Antenna is intended to simplify the analysis of antennas by giving the user graphical interfaces in which to enter all relevant antenna and analysis code data. Essentially, X-Antenna creates a Motif interface to the user's antenna analysis codes. A command-file allows new antennas and codes to be added to the application. The menu system and graphical interface screens are created dynamically to conform to the data in the command-file. Antenna data can be saved and retrieved from disk. X-Antenna checks all antenna and code values to ensure they are of the correct type, writes an output file, and runs the appropriate antenna analysis code. Volumetric pattern data may be viewed in 3D space with an external viewer run directly from the application. Currently, X-Antenna includes analysis codes for thin wire antennas (dipoles, loops, and helices), rectangular microstrip antennas, and thin slot antennas.
    Keywords: COMMUNICATIONS AND RADAR
    Type: NASA-CR-199212 , NAS 1.26:199212 , REPT-722792-8
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 5
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    Radar cross section studies (1987)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: The ultimate goal is to generate experimental techniques and computer codes of rather general capability that would enable the aerospace industry to evaluate the scattering properties of aerodynamic shapes. Another goal involves developing an understanding of scattering mechanisms so that modification of the vehicular structure could be introduced within constraints set by aerodynamics. The development of indoor scattering measurement systems with special attention given to the compact range is another goal. There has been considerable progress in advancing state-of-the-art scattering measurements and control and analysis of the electromagnetic scattering from general targets.
    Keywords: COMMUNICATIONS AND RADAR
    Type: NASA-CR-181104 , NAS 1.26:181104 , FR-716148-21
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 6
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    A user's manual for the Electromagnetic Surface Patch code: ESP version 3 (1987)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: This report serves as a user's manual for Version III of the Electromagnetic Surface Patch Code or ESP code. ESP is user-oriented, based on the method of moments (MM) for treating geometries consisting of an interconnection of thin wires and perfectly conducting polygonal plates. Wire/plate junctions must be about 0.1 lambda or more from any plate edge. Several plates may intersect along a common edge. Excitation may be by either a delta-gap voltage generator or by a plane wave. The thin wires may have finite conductivity and also may contain lumped loads. The code computes most of the usual quantities of interest such as current distribution, input impedance, radiation efficiency, mutual coupling, far zone gain patterns (both polarizations) and radar-cross-section (both/cross polarizations).
    Keywords: COMMUNICATIONS AND RADAR
    Type: NASA-CR-180972 , NAS 1.26:180972 , TR-716148-19
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 7
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    Moment method analysis of microstrip antennas over a wide frequency range (1985)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: Expressions for the self and mutual impedance between microstrip antenna modes on a grounded dielectric slab are presented. The mutual impedance between the microstrip modes and a vertical current filament in the dielectric is also presented. These are the quantities required in a method of moments analysis of the microstrip antenna. Entire domain expansion modes, suitable for representing the microstrip current over a broad frequency range, are used. Efficient methods for the evaluation of the mutual impedance elements are described.
    Keywords: COMMUNICATIONS AND RADAR
    Type: NASA-CR-176842 , NAS 1.26:176842 , OSU-TR-716148-4
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 8
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    A user's manual for the method of moments Aircraft Modeling Code (AMC) (1989)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: This report serves as a user's manual for the Aircraft Modeling Code or AMC. AMC is a user-oriented computer code, based on the method of moments (MM), for the analysis of the radiation and/or scattering from geometries consisting of a main body or fuselage shape with attached wings and fins. The shape of the main body is described by defining its cross section at several stations along its length. Wings, fins, rotor blades, and radiating monopoles can then be attached to the main body. Although AMC was specifically designed for aircraft or helicopter shapes, it can also be applied to missiles, ships, submarines, jet inlets, automobiles, spacecraft, etc. The problem geometry and run control parameters are specified via a two character command language input format. The input command language is described and several examples which illustrate typical code inputs and outputs are also included.
    Keywords: AIRCRAFT DESIGN, TESTING AND PERFORMANCE
    Type: NASA-CR-186371 , NAS 1.26:186371 , FR-716199-14
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 9
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    Operation of the helicopter antenna radiation prediction code (1993)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: HARP is a front end as well as a back end for the AMC and NEWAIR computer codes. These codes use the Method of Moments (MM) and the Uniform Geometrical Theory of Diffraction (UTD), respectively, to calculate the electromagnetic radiation patterns for antennas on aircraft. The major difficulty in using these codes is in the creation of proper input files for particular aircraft and in verifying that these files are, in fact, what is intended. HARP creates these input files in a consistent manner and allows the user to verify them for correctness using sophisticated 2 and 3D graphics. After antenna field patterns are calculated using either MM or UTD, HARP can display the results on the user's screen or provide hardcopy output. Because the process of collecting data, building the 3D models, and obtaining the calculated field patterns was completely automated by HARP, the researcher's productivity can be many times what it could be if these operations had to be done by hand. A complete, step by step, guide is provided so that the researcher can quickly learn to make use of all the capabilities of HARP.
    Keywords: COMMUNICATIONS AND RADAR
    Type: NASA-CR-193259 , NAS 1.26:193259 , REPT-722792-4
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 10
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    A users manual for the method of moments Aircraft Modeling Code (AMC), version 2 (1994)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: This report serves as a user's manual for Version 2 of the 'Aircraft Modeling Code' or AMC. AMC is a user-oriented computer code, based on the method of moments (MM), for the analysis of the radiation and/or scattering from geometries consisting of a main body or fuselage shape with attached wings and fins. The shape of the main body is described by defining its cross section at several stations along its length. Wings, fins, rotor blades, and radiating monopoles can then be attached to the main body. Although AMC was specifically designed for aircraft or helicopter shapes, it can also be applied to missiles, ships, submarines, jet inlets, automobiles, spacecraft, etc. The problem geometry and run control parameters are specified via a two character command language input format. This report describes the input command language and also includes several examples which illustrate typical code inputs and outputs.
    Keywords: COMMUNICATIONS AND RADAR
    Type: NASA-CR-196445 , NAS 1.26:196445 , ESL-TR-722792-6
    Format: application/pdf
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    NASA TECHNICAL REPORTS
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