Divergence measurement antenna for single-pulse radar
AssigneeThomson-CSF
InventorsJean-Louis Pourailly, Jean-Louis Soule, Michel Gaudron, Alain Pages
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Abstract
A divergence measurement antenna for single-pulse radars comprises at least two radiant panels. With their beams having the same center of phase, they are oriented differently. A monotonic function of the angular divergence of a signal received by the antenna is obtained from the ratio of the power of the signal received by the first panel to its power received by the second panel. An even-parity function of the signal received is obtained by taking the sum of these two signals. Application to precise measurements of angular divergence.
Claims7
An antenna for a single-pulse radar, said antenna having a plane of symmetry and comprising:
- at least two radiant panels wherein each of said at least two panels provide respective beams with the phase center of each of said respective beams being the same but with each beam being oriented differently with respect to said plane of symmetry and each of said panels receiving a respective measured power signal from an incoming reception signal at a fixed angle with respect to said plane of symmetry wherein the ratio of the measured power signal received by one of said panels to the measured power signal received by another one of said panels is a monotonic function of said fixed angle and wherein the sum of said respective measured power signals received by said one panel and said another one panel is an even-order function of said fixed angle, whereby a measurement of the divergence between a detected target and a direction of aim of said antenna is provided.
An antenna according to claim 7 wherein, with the panels being constituted by slotted guides, the spacing between the slots differs from one panel to the other.
Dependencies are inferred from the claim text.