Device and method for increasing the angular resolution of an antenna arrangement
First Claim
1. A method for increasing angular resolution in a radar system looking in a direction of motion of the radar system and laterally theretowherein a doppler frequency shift of a transmitted signal is used to increase the angular resolution characterized in that during movement of the radar system, the radar system sequentially samples a plurality of adjacent, narrow regions by means of pencil-beam antenna signals, said adjacent, narrow regions are sampled so rapidly that this stimulates and is equivalent to illumination of a total area of all regions by means of a broad beam signal from the antenna, said broad-beam signal corresponds to superposition of individual, pencil-beam antenna signals from the narrow regions, and evaluating the pencil-beam signals and the equivalent broad-beam signal to obtain increased angular resolution of the radar system.
1 Assignment
0 Petitions
Accused Products
Abstract
The invention describes a device and a method for increasing the angular resolution in a radar system looking in the direction of motion and laterally thereto, wherein the doppler frequency shift of the transmitted signal is evaluated in order to increase the angular resolution. For this purpose, a plurality of adjacent, narrow regions are sampled sequentially by means of pencil-beam antenna characteristics during movement of the antennas. Relative to the total area, this is equivalent to illumination with a broad-beam antenna characteristic. The results from the simulation of this broad-beam illumination are combined with the results of the pencil-beam sampling processes in order to achieve an increase of the angular resolution of the antenna array.
-
Citations
10 Claims
-
1. A method for increasing angular resolution in a radar system looking in a direction of motion of the radar system and laterally thereto
wherein a doppler frequency shift of a transmitted signal is used to increase the angular resolution characterized in that during movement of the radar system, the radar system sequentially samples a plurality of adjacent, narrow regions by means of pencil-beam antenna signals, said adjacent, narrow regions are sampled so rapidly that this stimulates and is equivalent to illumination of a total area of all regions by means of a broad beam signal from the antenna, said broad-beam signal corresponds to superposition of individual, pencil-beam antenna signals from the narrow regions, and evaluating the pencil-beam signals and the equivalent broad-beam signal to obtain increased angular resolution of the radar system.
Specification