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| Number | Title | Issue Date |
| 7265710 | Multipath height finding method A method for determining the height HT of a target above a surface, the method comprising the steps of determining a distance R from a source to a target, determining a distance L representative of a distance traveled by a signal from the target that is r... | 09/04/2007 |
| 6765532 | Wideband signal detection and tracking system A system is provided for assisting in the detection and tracking of narrowband signals arriving at an antenna array operating over a wide detection bandwidth and in a crowded RF environment. Since the nature of the detection mission is constrained to be a general se... | 07/20/2004 |
| 4912479 | Microwave landing system There is disclosed a microwave landing system wherein there are provided at least two means which are spaced by a predetermined distance and from two of which beams radiate alternately to scan a predetermined region vertically and horizontally. In the mic... | 03/27/1990 |
| 4665404 | High frequency spread spectrum positioning system and method therefor The system includes a method and apparatus for transmitting a spread spectrum signal from each of a plurality of base stations. The spread spectrum signal has a predetermined timing and has a ground wave component and a sky wave component. The signal is t... | 05/12/1987 |
| 4607259 | Adaptive antenna for reducing multipath fades The present invention relates to an antenna arrangement for reducing multipath fades. The antenna arrangement comprises a curved main reflector disposed confocally with one focal point of a subreflector, and a feed arrangement. The feed arrangement compri... | 08/19/1986 |
| 4348676 | Automatic phase alignment system for a tracking antenna The tracking signals of a monopulse satellite tracking system are optimized by aligning the phases of the azimuth and elevation channels (the "difference" channels) with the reference (or "sum") channel using an autophase controller and a simulated far fi... | 09/07/1982 |
| 4307401 | Two-channel receiver-indicator for phase radio systems Two of three receivers of a receiver-indicator are tuned to the frequencies of a first guided station and first guiding station, second guided station and second guiding station, respectively, and a third receiver is tuned to the frequency of a repeater s... | 12/22/1981 |
| 4084160 | Arrangement for correcting deviations from the true bearing caused by reflecting surfaces in target tracking radar installations An arrangement for correcting deviations from the true bearing due to the effects of specular reflecting surfaces in target tracking radar installations having at least three primary feeds. At least two of the primary feeds are aligned such that a plane f... | 04/11/1978 |
