Abstract

The morphology of the picket-fence sensor on the antennae of night-flying Noctuidae and Pyralidae moths is described, and a 2λ cardboard wax model of the sensor is constructed. A polar plot of the model in the path length of 3.1-cm rf gives a broad bandwidth main lobe and two 20° bandwidth sidelobes. Moving the picket-fence sensor 1 cm in the path length gives an interference pattern of minimum and maximum rf energy. The radiation pattern and interference pattern accommodate the known far-IR side-emitted blackbody (9.7-μm) IR radiation of a flying moth.

© 1985 Optical Society of America

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