Title :
Optical delay line based on arrayed waveguide gratings´ spectral periodicity and dispersive media for antenna beamforming applications
Author :
Vidal, Borja ; Corral, Juan Luis ; Piqueras, Miguel Angel ; Marti, Javier
Author_Institution :
FRG/ITACA Res. Inst., Univ. Politecnica de Valencia, Spain
Abstract :
An optical delay line (ODL) based on the free spectral range periodicity of arrayed waveguide gratings (AWGs) and dispersive media is analyzed with emphasis on the AWG physical features that limit its performance as a photonic antenna beamforming network. This ODL presents multiple simultaneous true-time delay, straightforward multibeam capability and a drastic cost reduction in comparison with previously reported schemes. Moreover, a simulation model of the ODL that takes into account the AWG frequency misalignment is presented. Finally, experimental results are also provided for 40-GHz electrical signals.
Keywords :
antenna radiation patterns; arrayed waveguide gratings; beam steering; dispersive media; electro-optical modulation; microwave photonics; millimetre wave antenna arrays; optical delay lines; optical fibre dispersion; wavelength division multiplexing; 40 GHz; 40-GHz electrical signals; AWG frequency misalignments; AWG spectral periodicity; Mach-Zehnder electrooptical modulator; WDM signals; arrayed waveguide gratings; cost reduction; dispersive media; eight-element array antenna; free spectral range periodicity; multibeam capability; multiple simultaneous true-time delay; optical delay line; photonic antenna beamforming network; radiation pattern; simulation model; Antenna arrays; Array signal processing; Arrayed waveguide gratings; Costs; Delay lines; Dispersion; Optical arrays; Optical fiber networks; Optical waveguides; Performance analysis;
Journal_Title :
Selected Topics in Quantum Electronics, IEEE Journal of
DOI :
10.1109/JSTQE.2002.805984
