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| Number | Title | Issue Date |
| 7009464 | Waveguide polarizer differential phase error adjustment device A phase error adjustment device configured to connect to an end of a waveguide polarizer and correct phase errors that the waveguide polarizer might generate. In accordance with this embodiment, the phase error adjustment device comprises an aperture having a height... | 03/07/2006 |
| 6407702 | Method and system for obtaining direction of an electromagnetic wave A method and a system are disclosed which utilize the polarization properties of electromagnetic fields for a determination of the direction to the source of the electromagnetic radiation. The method and system primarily use a particular antenna device wi... | 06/18/2002 |
| 6271790 | Communication system A communications system in which a communications channel is defined at least in part by an electromagnetic wave having a carrier frequency and an electric field vector, the extremity or terminus of which traces a non-linear periodic path at a rotation fr... | 08/07/2001 |
| 6181288 | Polarization compensating device for antenna within a radome A polarization compensating device useful in correcting radome-induced polarization errors in a linearly polarized antenna in a missile is described.... | 01/30/2001 |
| 6006070 | Multi-function interactive communications system with circularly/elliptically polarized signal transmission and reception A communications system that uses electromagnetic waves. The communications system preferably operates in the millimeter-wave frequencies, and provides relatively high signal restoration and isolation. The communications system can use polarization divers... | 12/21/1999 |
| 5701591 | Multi-function interactive communications system with circularly/elliptically polarized signal transmission and reception A communications system that uses electromagnetic waves. The communications system preferably operates in the millimeter-wave frequencies, and provides relatively high signal restoration and isolation. The communications system can use polarization divers... | 12/23/1997 |
| 5507020 | Spectral sharing communication system with minimal inter-signal interference A communications system is disclosed for spectrum sharing of a microwave point-to-point system and a PCS system. The invention comprises a microwave communications system. This system includes a transmitter for transmitting a first signal and a second sig... | 04/09/1996 |
| 5099246 | Apparatus for determining roll position An apparatus for determining the roll position of a spinning projectile with the aid of polarized electro-magnetic radiation comprises a transmitter for emitting polarized radiation in a direction towards the projectile and a polarization-sensitive receiv... | 03/24/1992 |
| 4369519 | Cross polarization compensation system A cross polarization compensation system, in which an input elliptically polarized wave is converted, by a first rotatable differential phase shifter having a phase shift of 90° or less than 90°, into an elliptically polarized wave defined by (where &#x... | 01/18/1983 |
| 4345255 | Antenna feed system Each of a transmitter and a receiver connected to an antenna through a duplexer includes a π/2 and a π polarizer and an ortho-mode transducer (OMT) serially interconnected. In the receiver the OMT is connected at one output to a branching circuit and at... | 08/17/1982 |
| 4335387 | Radar antenna with rotating linear polarization designed to reduce jamming A radar antenna of the Cassegrain type comprises a paraboloidal principal reflector confronting a hyperboloidal or flat auxiliary reflector of smaller radius directing linearly polarized radiation from a source on their common axis toward the principal re... | 06/15/1982 |
| 4329687 | Radar radiating polarized signals The radar radiates, alternately or according to a given code, left-hand and right-hand circularly or elliptically polarized signals. At the receiving end, the two orthogonal polarized components of the received signal are processed separately, and the pha... | 05/11/1982 |
| 4268832 | Multipath discriminating antenna system To reduce guidance errors in a microwave landing system from false signals eflected by objects along runways, the transmitting antenna radiates an elliptically polarized beam. At the airborne receiver an antenna, such as a pyramidal horn, maintains the sep... | 05/19/1981 |
| 4264908 | Adaptive polarization separation A broadband adaptively controlled polarization separation network. Two transmitted signals vertically and horizontally polarized are received as elleptically polarized signals. One of the two received elliptically polarized signals is automatically adjust... | 04/28/1981 |
| 4197541 | Polarization agile planar array A planar array and associated apparatus providing polarization agility in radar systems. The array is composed of first and second pluralities of generally parallel, slot-radiator, linear arrays. The first group of linear arrays has radiator slots oriente... | 04/08/1980 |
