USA As Represented by Secretary of the Navy

John M Boyle

Marko Afendykiw

Charles E Hendrix

Gaylon L West

A passive inductor and associated circuitry which enables a compact search oil to simulate the response characteristics of a service mine search coil having different electrical properties. Output from the passive inductor is amplified and modified to duplicate frequency response characteristics at ship frequency, magnetic sensitivity, and output impedance of a larger search coil. Provision is made for disengagement of magnetic surveillance by the inductor.

Mine search coil simulator

A radar system for determining the position of a target using a radio frency source of opportunity. The system uses an interferometer antenna and cross-correlation techniques to measure the time delay in receiving a reflected signal from the target as compared to receiving a direct signal from the signal source. Thereby, the distance from the RF source via the target to the antenna is determined. Additionally, the system uses a plurality of interferometer antennas and cross-correlation techniques to measure the relative phase difference between the signals received by the antennas. Thereby the angle of arrival of the reflected signals from the target is determined. Combining the range and angular information locates the target.

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China Lake, CA, United States of America

John M Boyle