Resources Contact Us Home
Radar arrangement

Image Number 3 for United States Patent #5109231.

A radar system comprises a transmitter which essentially continuously transmits a modulated carrier wave signal and a receiver for receiving the carrier wave signal reflected at an object (echo signal). The carrier wave signal is modulated with a code-generating signal whose code frequency is determined for the range resolution of the radar. The code-generating signal is such that one bit in the code has a duration which is several times longer than the period of the carrier wave signal and several bits of the code form a block which is obtained by modulation of a carrier wave with constant frequency. The frequency of the carrier wave is changed between blocks so that the transmitter sends a block with a carrier wave frequency which is different from the carrier wave frequency or frequencies which the receiver is set up to receive. The receiver stores the transmitted code and correlates it with the received signal. When code correspondence (synchronism) is obtained this corresponds to a definitive position of the echo response reflector. By changing frequency between blocks different "types of radar" can be dedicated to different range zones, and a radar system is obtained which is adapted to cope with modern threat environments. The radar is difficult to spot, difficult to define and to disturb.

  Recently Added Patents
Electron-beam lithography method with correction of line ends by insertion of contrast patterns
Knee guard
Triazole derivatives as ghrelin analogue ligands of growth hormone secretagogue receptors
Driver circuit for driving semiconductor switches
Polyamide compositions
SRAM cells using shared gate electrode configuration
Synthetic bone grafts
  Randomly Featured Patents
Granular secondary alkanesulfonate
Vehicle wheel rim
Determining, storing, and analyzing product country classifications
Pallet assembly
Suit variable mahjong tile and a mahjong gaming apparatus with suit variable mahjong tiles
Micro optical fiber light source and sensor and method of fabrication thereof
System comprising a multi-layer-multi-turn structure for high efficiency wireless communication
Garment with moisture vapor transmissive wind barrier panels
Method of securing intake tubes in intake manifold