MICROWAVE DESIGN CALCULATIONS

Computer program: ENMICRW. Microwave program performs path calculations necessary for the proper design of a microwave system. This program takes the same approach as used by the Federal Communications Commission and should give results identical to that program. The method used is an adaptation from the "Inverse Position Computation" set out on Page 14 of "Special Publication No. 8", Coast and Geodetic Survey: Formulas and Tables for the Computation of Geodetic Positions. This method takes into account the oblateness of the earth, and therefore gives more precise values than an uncorrected great-circle calculation method. Inputs: Inputs for this program are as follows: (1) Latitude and longitude for the sites. (2) Waveguide length for the sites. (3) Antenna dish size for the sites. (4) Transmitter power in DBM. (5) Transmitter frequency for the sites. (6) Receiver detection threshold. (7) Distance from one site other than midpoint, where fresnel is to be calculated. Outputs: The outputs from this program are as follows: (1) Printed outputs of the latitudes and longitudes that were specified between individual hops. (2) Azimuth from Site 1 to Site 2. (3) Azimuth from Site 2 to Site 1. (4) Distance from Site 1 to Site 2 expressed in feet and miles. (5) Freespace loss. (6) Waveguide loss. (7) Total path loss in DB. (8) Total gain in DB. (9) Net path loss in DB. (10) Median received signal in DB. (11) Carrier/Noise Ratio in DB. (12) Fade margin to 52 DBA per channel. (13) Fresnel at the midpoint.

  • Corporate Authors:

    Atchison, Tokeka and Santa Fe Railway

    9th and Jackson Streets, Information Systems Department
    Topeka, KS  USA  66628
  • Authors:
    • Robinson, R E
  • Publication Date: 1972

Subject/Index Terms

Filing Info

  • Accession Number: 00098771
  • Record Type: Publication
  • Source Agency: American Railway Engineering Association
  • Files: TRIS
  • Created Date: Aug 27 1976 12:00AM