Continuously variable true time-delay optical feeder for phased-array antenna employing chirped fiber grating

Author

Corral, J.L. ; Martí, J. ; Regidor, S. ; Foster, Justin M. ; Laming, R. ; Cole, M.J.

Author_Institution

ETSI Telecommun., Univ. Politecnica de Valencia, Spain

Volume

45

Issue

8

fYear

1997

fDate

8/1/1997 12:00:00 AM

Firstpage

1531

Lastpage

1536

Abstract

In this paper, we present and demonstrate a novel approach of a true time-delay (TTD) optical feeder for phased-array antennas (PAAs). A continuously variable TTD is achieved by employing tunable lasers and a wide-bandwidth chirped fiber Bragg grating (FBG) as the dispersive element. The results show that a very high resolution performance (equivalent to a 6-b microwave phase shifter) is obtained for an L-band PAA employing narrow-tuning bandwidth lasers with a wavelength stability of 0.005 nm and a 4-nm bandwidth chirped grating with a dispersion of 835 ps/nm

Keywords

antenna feeds; antenna phased arrays; array signal processing; diffraction gratings; laser beam applications; laser tuning; microwave antenna arrays; optical delay lines; optical fibres; Bragg grating; L-band; chirped fiber grating; continuously variable true time-delay; dispersive element; high resolution performance; narrow-tuning bandwidth lasers; phased-array antenna; true time-delay optical feeder; tunable lasers; wavelength stability; Antenna feeds; Bandwidth; Bragg gratings; Dispersion; Fiber gratings; Fiber lasers; Laser stability; Masers; Phase shifters; Tunable circuits and devices;

fLanguage

English

Journal_Title

Microwave Theory and Techniques, IEEE Transactions on

Publisher

ieee

ISSN

0018-9480

Type

jour

DOI

10.1109/22.618471

Filename

618471