Analysis of Monopulse Tracker Antenna Performance in a Multipath Environment.
Abstract
This report summarizes the results of a study of monopulse tracking antenna performance at low angles. The objectives of this study were two-fold: (1) To investigate the multipath effects of surface roughness and soil moisture on the elevation accuracy of a monopulse tracker, particularly at low angles. This includes the antenna beam shape characteristics such as beamwidth, roll-off rate and sidelobe level; and (2) To determine which, if any, realizable antenna designs might yield a significant improvement in tracking accuracy down to about 5 deg, keeping in mind logistics requirements for a light-weight portable antenna. Although this study did not initially constrain itself to previous practical antenna sizes such as the GMD, PLUSS, etc., it was recognized that the optimum antenna selected would need to eventually consider size and weight factors. Therefore the previously measured performance characteristics of the GMD and PLUSS antennas were reviewed and included in a comparative performance evaluation. There are two basic findings presented herein: (1) In order to track in elevation down to 5 deg, a sum-pattern 3 dB beam-width of 5 deg and a -40 dB sidelobe level is required; and (2) This performance can be best obtained from a microstrip antenna array using graphite-epoxy struss technology.
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 01, 1980
- Accession Number
- ADA085131
Entities
People
- K. R. Carver
- T. F. Bush
Organizations
- New Mexico State University