Optically beamformed array performance

Author

Dalmases, F. ; Blanch, S. ; Romeu, J. ; Jofre, L. ; Vidal, B. ; Martí, J. ; Mckenzie, I. ; Vez, E. ; Santamari, J.

Author_Institution

Dept. Signal Theor. & Commun., Univ. Politec. de Catalunya, Catalunya

fYear

2006

fDate

6-10 Nov. 2006

Firstpage

1

Lastpage

5

Abstract

Free-space optical beamforming networks (OBFN) show great potential for wideband antenna arrays. However, for a practical implementation, several technological and architectural issues need to be addressed. This paper models an existing OBFN architecture in reception mode and studies its impact in the performance of a real SAR system in terms of noise figure (NF), output third-order intermodulation products (IP3) and dynamic range (SFDR). Once the impact of the OBFN has been studied, different improvements are introduced like the use of erbiumdoped fiber amplifiers (EDFAs), avalanche photodetectors (APDs), RF phase shifters and RF power amplifiers, leading to a solution suitable for large arrays. Furthermore, different system design trade-offs (RF and optical) are considered.

Keywords

beam steering; broadband antennas; intermodulation; optical links; free-space optical beamforming networks; noise figure; optically beamformed array; third-order intermodulation products; wideband antenna arrays; Broadband antennas; Erbium-doped fiber amplifier; Optical arrays; Optical beams; Optical fiber amplifiers; Optical fiber networks; Phased arrays; Power amplifiers; Radio frequency; Radiofrequency amplifiers;

fLanguage

English

Publisher

ieee

Conference_Titel

Antennas and Propagation, 2006. EuCAP 2006. First European Conference on

Conference_Location

Nice

Print_ISBN

978-92-9092-937-6

Type

conf

DOI

10.1109/EUCAP.2006.4584825

Filename

4584825