Title: Surveillance radar

Abstract: 1. In a radar apparatus having a pulsed transmitter source of linearly poized radio-frequency energy, a duplexer, a receiver, and a directional antenna system including a rotatable dipole antenna for radiating linearly polarized radio-frequency energy, means interconnecting said duplexer and said dipole antenna for rotating said linearly polarized energy at a prescribed rate, means for rotating said dipole antenna in a vertical plane at said prescribed rate, a cathode ray tube indicator, means independent of said pulsed transmitter source and in circuit with said cathode ray tube indicator for generating a circular trace on the face of said cathode ray tube indicator, and means in circuit with said cathode ray tube indicator and responsive to the video output of said receiver for distorting the clutter pattern from natural targets along the perimeter of said circular trace when linear polarization energy is reflected from a man-made target having a defined plane of polarization.

Do you think this is a good invention? Vote now:

Votes so far: For:(0) Against:(0)
Other info:

Inventors: Dunn, Ralph L. (Neptune, NJ, US)

Application Number: 099964
Filing Date: 1961-03-31
Publication_date: 1976-03-16
Assignee: The United States of America as represented by the Secretary of the Army (Washington, DC)
Primary Class(es): 342/27 342/188, 342/361
Other Classes:
US Patent Ref:

2513962

Jul, 1950

Patterson

343/16.

Other Refs:
Primary Examiner: Tubbesing, T. H.
Assistant Examiner:
Attorney: Edelberg; Nathan, Gibson; Robert P., Murray; Jeremiah G.