True time-delay scheme for feeding optically controlled phased-array antennas using chirped-fiber gratings
β Scribed by Corral, J.L.; Marti, J.; Fuster, J.M.; Laming, R.I.
- Book ID
- 119786465
- Publisher
- IEEE
- Year
- 1997
- Tongue
- English
- Weight
- 79 KB
- Volume
- 9
- Category
- Article
- ISSN
- 1041-1135
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## Abstract A novel optical true timeβdelay (TTD) feeder for phasedβarray antennas incorporating a fiber Bragg grating (FBG) prism and optical fibers with metal film deposited on their cleaved ends is proposed. By arranging a metalβfilm reflector at one end of the fiber delay line with FBGs written
dition. The reflection boundary condition (RBC) and the absorbing boundary condition (ABC) are examples of such velocity boundaries that have been investigated with the problem of synthesizing a rectangular deep null in the sidelobe region. The obtained results show that by using an RBC or ABC, and