Title :
A novel 2N beams heterodyne optical beamforming architecture based on N/spl times/N optical Butler matrices
Author :
Madrid, D. ; Vidal, B. ; Martinez, A. ; Polo, V. ; Corral, J.L. ; Marti, J.
Author_Institution :
FRG/ITACA, Univ. Politecnica de Valencia, Spain
Abstract :
A novel beamforming architecture based on optical Butler matrices is proposed and experimentally evaluated. The optical Butler matrix operating principle and the effects of fabrication inaccuracies on the beamformer radiation pattern are presented. The proposed architecture offers simultaneous multibeam generation capability. 40 GHz RF phase measurements are presented with low ripple and high linearity. Finally, an upgraded architecture is proposed which allows to double the number of beams (2N).
Keywords :
antenna phased arrays; antenna radiation patterns; integrated optics; microwave photonics; 2N beams heterodyne optical beamforming architecture; 40 GHz; N/spl times/N optical Butler matrices; RF phase measurements; beamformer radiation pattern; electro-optical amplitude Mach-Zehnder modulator; fabrication inaccuracies; high linearity; low ripple; multibeam generation capability; optical coupler; optical phase shifters; phased-array antennas; true time delay; upgraded architecture; Acoustic beams; Array signal processing; Butler matrix; Integrated optics; Optical beams; Optical crosstalk; Optical mixing; Optical variables control; Optical waveguides; Transmission line matrix methods;
Conference_Titel :
Microwave Symposium Digest, 2002 IEEE MTT-S International
Conference_Location :
Seattle, WA, USA
Print_ISBN :
0-7803-7239-5
DOI :
10.1109/MWSYM.2002.1012245
