Title :
Photonic true time delay beamformer demonstrator for a radio astronomical array antenna
Author :
Van Dijk, Raymond ; Bregman, Jaap D. ; Roodnat, Anton ; Van Vliet, Frank E.
Author_Institution :
TNO Phys. & Electron. Lab., The Hague, Netherlands
Abstract :
The design and characterisation results of a prototype beamformer for receive application are presented. The four channel system uses switched fibre delay lines and signals are combined optically before addition on a single detector. An SFDR of 101 dB·Hz2/3 has been measured, which is good, given the use of a low power directly modulated laser diode
Keywords :
antenna phased arrays; antenna radiation patterns; array signal processing; microwave antenna arrays; microwave photonics; optical delay lines; optical modulation; radioastronomy; SFDR; four channel system; low power directly modulated laser diode; photonic true time delay beamformer; radio astronomical array antenna; switched fibre delay lines; Antenna arrays; Bandwidth; Delay effects; Optical beams; Optical modulation; Optical noise; Optical receivers; Optical signal processing; Phased arrays; Semiconductor device noise;
Conference_Titel :
Microwave Photonics, 2000. MWP 2000. International Topical Meeting on
Conference_Location :
Oxford
Print_ISBN :
0-7803-6455-4
DOI :
10.1109/MWP.2000.889791
