Computing angle of arrival of radio signals
| DWPI Title: System for facilitating computing angle of arrival of radio signal emitted from transmitter, has processing circuit computing angle of arrival of radio signal based on measurements pertaining to radio signal respectively output by receivers |
| Abstract: Various technologies pertaining to computing angle of arrival of radio signals are described. A system that is configured for computing the angle of arrival of a radio signal includes a cylindrical sheath wrapped around a cylindrical object, where the cylindrical sheath acts as a ground plane. The system further includes a plurality of antennas that are positioned about an exterior surface of the cylindrical sheath, and receivers respectively coupled to the antennas. The receivers output measurements pertaining to the radio signal. A processing circuit receives the measurements and computes the angle of arrival of the radio signal based upon the measurements. |
| Use: System for facilitating computing an angle of arrival of a radio signal emitted from a transmitter. |
| Advantage: The system utilizes a structure that results in reduction of an unwanted radiation mode, which extends orthogonal to the exterior surface of a cylindrical object when the antenna is positioned on the cylindrical sheath. The processing circuit identifies two or more angles that include large dot product result magnitudes, such that only one of such angles is a correct angle. The system utilizes a folded cavity structure that reduces lateral length of the antenna compared to unfolded structures, thus allowing for the antenna to include a smaller visible footprint when placed on the sheath and/or an obstacle. |
| Novelty: The system (100) has antennas positioned on an exterior surface of a cylindrical sheath (102). Receivers are respectively coupled to the antennas, and output respective measurements pertaining to a radio signal. A processing circuit (112) is in communication with each receiver in the receivers, and computes an angle of arrival of the radio signal based on a model that models the antennas as infinite-length magnetic line sources and models the cylindrical sheath as an infinite length conductive cylinder, and the measurements pertaining to the radio signal respectively output by the receivers. |
| Filed: 11/25/2014 |
| Application Number: US14552707A |
| Tech ID: SD 13116.0 |
| This invention was made with Government support under Contract No. DE-NA0003525 awarded by the United States Department of Energy/National Nuclear Security Administration. The Government has certain rights in the invention. |
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