Broadband interferometer and direction finding missile guidance system

摘要

A wide bandwidth interferometer which may be employed in a guidance system for a rolling missile delays the radar signals detected by one of the antennas by a fixed amount and the signals detected by the other antenna by a variable amount prior to their multiplication in a device which first advances the phase of one of the signals by 90°. The product signal, which is proportional to the sine of the angle between the rolling axis and the line-of-sight to the target, is integrated in a limited-integrator whose output is summed with a pick-off signal from an onboard gyroscope. The sum signal determines the amount of the variable delay, while the output of the integrator controls the gyroscope to align it with the radar signal direction and the missile steering apparatus to home it on target.