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Radar cross section of symmetric parabolic reflectors with cavity-backed dipole feeds

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3 Author(s)
D. C. Jenn ; Dept. of Electr. & Comput. Eng., US Naval Postgraduate Sch., Monterey, CA, USA ; J. E. Fletcher ; A. Prata

The monostatic radar cross section (RCS) of a symmetric parabolic reflector antenna with a cavity-backed dipole feed is computed using the method of moments. At frequencies below the operating frequency band of the antenna the dipole contribution is not significant; in the operating band the dipole terminal load condition only affects the RCS near boresight. The f/D ratio of the antenna is shown to have a significant effect on the RCS. By adjusting the focal length, the cavity and paraboloid scattering contributions can be made to partially cancel, yielding a reduction in RCS near boresight

Published in:

IEEE Transactions on Antennas and Propagation  (Volume:41 ,  Issue: 7 )