Photonically controlled active array radar system
US6768458B1 · kind B1 · utility
16Cited by
17References
53Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 9, 1999 |
| Grant date | Jul 27, 2004 |
| Priority date | — |
| Expiry date | Aug 9, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01Q3/2682
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
An active array radar system is controlled by photonic signals. The array of N antenna elements is divided into M subarrays, each having N/M antenna elements. Tunable lasers provide M optical wavelengths within non-overlapping bands. For transmission, a microwave transmit pulse is amplitude modulated onto the M optical signals. Time delays are introduced for an offset between elements in a subarray and for an offset between subarrays. By using wavelength division multiplexing each antenna element on the array has a true time delay.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.