Radar systems on military aircraft require antennas which meet very exacting electrical performance specifications. Low sidelobes are required in order to enable the pulse-Doppler processing to extract the targets from the surrounding clutter and the highest gain achievable within these limits is always sought. As a consequence of the space constraints imposed by the aircraft radome and the low weight and moment of inertia requirements from the scanner a resonant planar slotted waveguide array is often the ideal antenna for use in these circumstances. These antennas are mechanically rather complex, however, in comparison to a reflector and this paper describes a design methodology making use of extensive electromagnetic modeling which eliminates many needless laboratory prototypes. A near field diagnostic technique is also described which allows slot excitations to be measured and compared with those arising from the theoretical model from which design corrections can directly be derived.
Design and diagnostic testing of planar slotted waveguide array antennas
Entwicklung und Diagnostik von planar geschlitzten Hohlleiterantennen
1990
6 Seiten, 5 Bilder
Aufsatz (Konferenz)
Englisch
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