Generation of Radiation Patterns Equivalent to In-Flight Measurements

摘要

Comparison of in-situ measured antenna radiationpatterns (RPs) to modeled ones is vital for validation of both. Inflightmeasured RPs do not always produce a standard conic orelevation cut (constant θ or ϕ angle, respectively), but rather GreatCircle (GC) cuts at the aircraft bank angle of interest. WIPL-D’spost-processing routines, on the other hand, do not produce GCcuts in normal setups. A manipulation of the aircraft orientationin xyz-coordinates is required to accomplish this task. Understandard conditions in WIPL-D, the fuselage is positioned parallelto the x-axis and the wings parallel to the y-axis. A model rotationof 90° with respect to the y-axis allows for the generation of GCcuts, where θ and ϕ swap roles. This makes comparison betweenin-flight measurements and computed data cumbersome. Thispaper investigates several options to produce non-standard RPsin WIPL-D and MATLAB (using WIPL-D results) that areequivalent to those of in-flight measurements.