Accession Number : ADA257911


Title :   Monopole Elements with Disk Ground Planes on Flat Earth: Atlas of Directivity, Radiation Efficiency, Radiation Resistance, and Input Impedance


Corporate Author : MITRE CORP BEDFORD MA


Personal Author(s) : Weiner, M M


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a257911.pdf


Report Date : Jun 1992


Pagination or Media Count : 208


Abstract : Richmond's moment-method programs IRCHMOND3 and RICHMOND4 for monopole elements with disk ground planes above flat Earth are used to obtain computer plots of directivity, radiation efficiency, radiation resistance, and input impedance at 15 MHZ. Results, in the form of an atlas, are presented as a function of Earth classification for thin, quarter-wave monopole elements whose ground planes or radii 0 to 8 wavenumbers rest on Earth. Results are compared with those for a perfect ground plane (of infinite extent and conductivity) and ground plane in free-space. Sea-water enhancement of radiation efficiency and low-angle directivity by comparing results for sea water with those for medium dry ground.


Descriptors :   *COMPUTER PROGRAMS , *EARTH MODELS , *METHOD OF MOMENTS , *PLOTTING , INPUT , FUNCTIONS , ANGLES , RADIATION , COMPUTERS , WATER , RESISTANCE , RADIATION RESISTANCE , LOW ANGLES , REST , SEA WATER , IMPEDANCE , AUGMENTATION , EFFICIENCY , MOMENTS , FRESH WATER , CLASSIFICATION , DISKS , OCEANS


Subject Categories : Cartography and Aerial Photography
      Computer Programming and Software


Distribution Statement : APPROVED FOR PUBLIC RELEASE