Zobrazeno 1 - 10
of 14
pro vyhledávání: '"Irwin L. Newberg"'
Publikováno v:
Applied Physics Letters. 72:745-747
An artificial nonlinear surface has been developed using antenna-coupled mixers with optical interconnects for microwave and millimeter-wave phase conjugation. Prototype one-dimensional arrays have been constructed and have been used to demonstrate t
Publikováno v:
SPIE Proceedings.
We propose and demonstrate a tunable photonic radio frequency notch filter. The filter has a single delay line architecture and incorporates a new wavelength-selective true-time-delay. The time delay in the feed-forward loop can be varied by simply c
Autor:
Irwin L. Newberg
Publikováno v:
SPIE Proceedings.
Applications oflong fiber optic delay lines as a radar test target unit to improve radar testing are discussed. The unit intercepts a small amount ofthe radar's transmitted energy, delays it in a fiber optic delay line, and then feeds it back into th
Publikováno v:
SPIE Proceedings.
A new type of RF-photonic antenna design which uses an optical serially-fed phased array is proposed for applications in radar and communication systems. This antenna has the advantages of true time delay and yet only requires one tunable laser and o
Publikováno v:
Optical Technology for Microwave Applications VI and Optoelectronic Signal Processing for Phased-Array Antennas III.
The possibilities for using photonic technology to enhance the performance of phased array systems are examined. The principal advantage of photonics is that a photonic array antenna can be partitioned in two halves, the beam-forming manifold consist
Autor:
Norman P. Bernstein, Irwin L. Newberg, Andrew A. Walston, Gregory L. Tangonan, J. J. Lee, Willie W. Ng
Publikováno v:
SPIE Proceedings.
The first microwave-phased array antenna steered by optical delay lines is described. The optical ''time shifters'' utilize the propagation of light waves through a finite length of fiber to generate the time delays that control the beam pointing ang
Publikováno v:
SPIE Proceedings.
A fiber-optic delay network consisting of eight different and selectable fiber delays has been demonstrated over a 1 to 11 GHz frequency range. The delay networks can be used as a three-bit resolution beam steerer for an electronically steered antenn
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