Zobrazeno 1 - 10
of 49
pro vyhledávání: '"Anastasios P. Goutzoulis"'
Publikováno v:
Optical Materials. 2:191-194
The suitability of mercurous chloride for commercial applications was examined by fabricating Bragg cells and acousto-optic tunable filters (AOTF). The acoustic attenuation measurements showed that for operation at a center frequency of 30 MHz, it sh
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ae2580c663814bc229d93861a213385d
https://doi.org/10.1016/0925-3467(93)90012-p
https://doi.org/10.1016/0925-3467(93)90012-p
Autor:
Anastasios P. Goutzoulis
Publikováno v:
Applied optics. 28(19)
The implementation of fast Fourier transforms (FFTs) via the use of residue factored look-up tables (FLUTs) is investigated. The principles of FLUTs are reviewed, and a gate-level pipelined adder architecture is presented. The basics of the quadratic
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::40ad6922dc97dacd70904a9d1bfbd975
https://pubmed.ncbi.nlm.nih.gov/20555843
https://pubmed.ncbi.nlm.nih.gov/20555843
Publikováno v:
Applied optics. 27(9)
Position-coded modulo m lookup tables (LUTs) with gate complexities equal to m(2), 2m, and 4 radicalm are discussed. The design of practical miniaturized LUTs is described along with results obtained from a prototype 7 x 7 laser diode LUT. A factored
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::102922cf628cabd921d06263a7c8c597
https://pubmed.ncbi.nlm.nih.gov/20531635
https://pubmed.ncbi.nlm.nih.gov/20531635
Autor:
Anastasios P. Goutzoulis, John M. Zomp
Publikováno v:
Applied optics. 36(29)
We describe the design and development of an eight-element hardware-compressive receive true-time-delay steering system that employs wavelength-division multiplexing. The laboratory system performance and results from the system demonstration at the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::11bd5409863e88fb6103417a8608d243
https://pubmed.ncbi.nlm.nih.gov/18264240
https://pubmed.ncbi.nlm.nih.gov/18264240
Publikováno v:
SPIE Proceedings.
Phased array antennas (PAAs) offer many advantages including steering without physical movement, accurate beam pointing, increased scan flexibility in two dimensions, precise PAA element phase and amplitude control to obtain low sidelobes, and reduce
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e0787614c560d93e7e73e49b901bb463
https://doi.org/10.1117/12.308938
https://doi.org/10.1117/12.308938
Publikováno v:
SPIE Proceedings.
Phased array antennas (PAAs) offer many advantages including steering without physical movement, accurate beam pointing, increased scan flexibility in two dimensions, precise PAA element phase and amplitude control to obtain low sidelobes, and reduce
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6256dc14c7e067448cc362a6bd81250a
https://doi.org/10.1117/12.283945
https://doi.org/10.1117/12.283945
Publikováno v:
SPIE Proceedings.
Microwave radar array antennas generally employ a beamformer which functions as the interface between the array elements and the transmitter-receiver, distributing signals to the array elements on transmit, and coherently combining the elemental sign
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d605d77a32574ed514fe81144d80ec93
https://doi.org/10.1117/12.218514
https://doi.org/10.1117/12.218514
Publikováno v:
SPIE Proceedings.
We describe the developemnt and antenna range demonstration of a UHF 8-element optically- powered directly modulated fiberoptic manifold. Active laser diode drive circuits are used to increase the laser diode sensitivity and reduce the link noise fig
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::db32d778e0a5fe3fd050a81b280c2693
https://doi.org/10.1117/12.218515
https://doi.org/10.1117/12.218515
Publikováno v:
SPIE Proceedings.
We describe the development and antenna range demonstration of the Westinghouse fiber optic wavelength-multiplexed true time delay steering system for use with broadband phased array antennas. The prototype system is based on a unique hardware compre
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1b843715f34268517d74f3ca713fa4a3
https://doi.org/10.1117/12.177408
https://doi.org/10.1117/12.177408
Publikováno v:
Optical Technology for Microwave Applications VI and Optoelectronic Signal Processing for Phased-Array Antennas III.
We describe the extension of the 1-D hardware-compressive wavelength-multiplexed (lambda-MUX) true time delay (TTD) steering architecture described earlier to 2-D array or subarray antennas, and we present a technique for achieving multiple beams at
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::85cc9b3b609e3361f725195f7122caed
https://doi.org/10.1117/12.138431
https://doi.org/10.1117/12.138431