Abstract: A radar sensor mounted in a projectile detects a target and orients the projectile so that a self-forging fragment, carried in the projectile, may be properly fired toward the top of the target. The sensor provides means for generating a broad fan beam containing a plurality of closely spaced interference lobes spaced so as to encompass a predetermined target size. The interference lobes are continuously swept across the line of travel and the receiving circuitry provides means for detecting the desired target within the interference lobes.

Abstract: An attachment is provided for aircraft, and particularly for helicopters, for use in conjunction with a microwave interference pattern sensor (MIPS) system, to sense low velocities, for example, such as are encountered when the helicopter is in a hover mode. The attachment includes an antenna array which is separated from the MIPS antenna array, and which comprises two sets of transmitting and two pairs of receiving antenna horn apertures mounted in orthogonal relationship with one another, the transmitting apertures of each set being scanned in sequence to produce a moving energy pattern which is intercepted by the receiving antenna apertures of the attachment, even though the aircraft is stationary.

Abstract: A low cost system using passive radiometry or active radar for the detection of a target and providing discrimination between desired targets and false targets. The device may be mounted on a drone aircraft or other vehicle and comprises a detecting sensor having a fixed antenna system whose function is to detect the presence and direction to a target in airframe coordinates. The sensor provides means for generating a broad fan beam containing a plurality of closely spaced interference lobes spaced so as to encompass a predetermined target size. The interference lobes are continuously swept across the line of travel and the receiving circuitry provides means for detecting a desired target within the interference lobes. The system also provides a pre-programmed means, initiated by the target sensor, designed to aim the aircraft at the target and a target tracker or homing means having a fixed antenna directed along the heading axis of the drone aircraft and used to "home" the aircraft into the target.

Abstract: A passive microwave velocity sensor uses the natural radiation from the terrain to determine ground velocity independent of altitude. The sensor employs two radiometric interferometers, which analyze inputs from two pairs of receiving antennas aligned along the direction in which velocity is to be sensed. Each pair of receiving antennas has a combined radiation pattern that generates a series of interference fringes along the terrain. Circuitry in each interferometer detects the variation in amplitude of terrain radiation as the antennas pass over the terrain. The frequency of the detected signal is directly proportional to ground velocity divided by altitude. The phase delay in the signals is inversely proportional to altitude. Dividing the frequency by the phase delay yields a signal directly proportional to ground velocity and independent of altitude.

Abstract: An antenna system in which the antennas are not mechanically rotated generates an amplitude-modulated signal of equal intensity in all horizontal directions with the phase of the amplitude modulation varying directly with bearing or azimuth to the antenna system. The antenna system uses a central antenna which radiates a carrier signal and a plurality of sideband antennas, 4 in number, which radiate upper and lower sideband signals. The phase of the upper sideband signal is advanced in increments of .pi./2 radians processing around the sideband antennas in a chosen direction, while the phase of the lower sideband signal is delayed in increments of .pi./2 radians proceeding around the sideband antennas in the chosen direction.

Abstract: A velocity sensor system comprising a receiver capable of processing the narrow pulse speckle pattern return from a transmitting source in order to determine the velocity of the vehicle in which the velocity sensor is mounted. Three channels, each one connected to a receiving horn, receive the speckle pattern return signal equal in power but separated in space due to the spatial arrangement of the horns. A first local oscillator is connected to each channel and is controlled as part of an Automatic Frequency Control (AFC) loop. A carrier frequency from the first local oscillator along with the received signal is applied to the first mixer stage to produce a first IF signal which is applied to a wide band IF amplifier. The wideband IF amplifier is designed to blank the receiver during the transmitter pulse in order to prevent overloading of the receiver or overpowering of the echo.