Trw Limited

Gerald J Stiles

Joseph W Niesen

An enhanced Doppler type direction finding system uses two antennas or antenna pairs ( & ) that are rotated in two mutually orthogonal circular paths ( & ) to intercept incoming RF from an emitting source, whose direction is to be determined.

Rotating doppler receiver

A passive millimeter-wave imaging system (,) that includes a millimeter-wave camera (,) positioned at the end of an aircraft landing strip (,) to provide an image (,) of the aircraft (,) approaching the landing strip (,) along a landing glidepath (,). The camera (,) broadcasts the image (,) of the aircraft (,) approaching the landing strip (,) to the aircraft (,) and to a control tower (,). With this information, the pilot of the aircraft (,) sees his aircraft's position relative to the glidepath (,), and can make landing adjustments accordingly. Likewise, the tower personnel can monitor the aircraft landing glidepath (,) to insure that the aircraft (,) maintain a safe distance relative to the ground. In one embodiment, a closed-loop communication is provided between the aircraft (,) and the camera (,), where the aircraft (,) transmits a signal to the camera (,) that is combined with the image (,) to give the pilot an indication of which aircraft (,) in the image (,) is his aircraft (,). The coded signal transmitted by the aircraft (,) can also be used to give a range of the aircraft (,) from the landing strip (,).

Growing community of inventors

El Segundo, CA, United States of America

Gerald J Stiles