Polarization Sensitivity of Monopulse Radar Boresight Error Induced by Large, Ogive Radomes.
AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH SCHOOL OF ENGINEERING
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The dependence of Boresight Error BSE on incident Electric Field E-Field polarization tilt angle is investigated. BSE, defined as the angular difference between a targets actual and radar-indicated position, is influenced by the radome used to protect the antenna. A - reliable computer model for predicting the BSE of electrically large radar-radome systems has been demonstrated and used to investigate the dependence of radome-induced BSE for various combinations of scan angle, element polarization, and incident E-Field polarization. The analysis includes a development of a transmissiondepolarization model to justify the results of the computer model. Results compare very well with empirical, published, and experimentally measured data for specific scan angle and polarization cases considered. Generally, BSE exhibits a noticeable dependence on E-Field polarization, except under limited scanning conditions for specific linearly polarized antenna apertures.
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