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| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | McMillan, S. |
| Copyright Year | 1991 |
| Description | Author affiliation: Syst. Div., Ball Commun., Broomfield, CO, USA (McMillan, S.) |
| Abstract | A four-armed spiral antenna can be used to perform broadband direction-of-arrival estimation using a single aperture. The accuracy of the estimate is degraded by the existence of unwanted modes, which arise from two sources: the network used to sense the individual mode information and energy that leaks past the primary radiation region of a particular mode into aliased models. A technique for minimizing the error induced by the leakage modes is described. The technique requires selecting a log spiral with a particular growth rate that causes the errors induced by these leakage modes to effectively cancel. A number of spirals have been built to test this technique, and it has been found to be effective. It reduced the root mean square (RMS) phase error in far-field patterns near the horizon to less than a quarter of that which would be seen in a nontuned spiral.< |
| Starting Page | 719 |
| Ending Page | 722 |
| File Size | 132761 |
| Page Count | 4 |
| File Format | |
| ISBN | 0780301447 |
| DOI | 10.1109/APS.1991.174940 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 1991-06-24 |
| Publisher Place | Canada |
| Access Restriction | Subscribed |
| Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Subject Keyword | Spirals Direction of arrival estimation Hafnium Frequency Surface treatment Arm Feeds |
| Content Type | Text |
| Resource Type | Article |
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