This video explains and illustrates how to use realistic feed data in reflector antenna analysis in GRASP. Such realistic feed data could come from measurements of an antenna feed or from simulation of a feed model.
Table of contents:
00:00: Introduction to video
00:39: Introduction to ideal and realistic feeds in GRASP
01:24: Dual-offset reflector antenna wizard geometry and radiation pattern
01:55: Setup of realistic feed, Tabulated Pattern
02:28: Replace ideal feed with realistic feed
02:48: Antenna radiation pattern with realistic feed, before feed normalisation
03:03: Realistic feed normalisation
03:32: Antenna radiation pattern with realistic feed, after feed normalisation
03:45: Realistic feed phase centre analysis and feed position adjustment
05:56: Antenna radiation pattern with realistic feed, after feed normalisation and feed position adjustment
06:14: Realistic feed, number of modes included and minimum sphere
08:50: Setup of realistic feed, Tabulated SWE Coefficients (SWE = Spherical Wave Expansion)
09:28: Update commands to use Tabulated SWE Coefficients as feed
10:21: Antenna radiation pattern with realistic feed, Tabulated SWE Coefficients
19 сен 2024
