Integrated InP circuits and Si TTD for analogue optical beamforming applications
conference paper
In future microwave systems, there will be an increasing need for wide bandwidths. Electronically steered antennas with bandwidths up to an octave or more are foreseen. The beamforming for these systems is problematic. The systems are generally in need of time-steering instead of phase-steering. Electrical true time-delays (TTD) are difficult to make over large instantaneous bandwidths. The beamforming options are RF beamforming, IF beamforming, digital beamforming, optical beamforming and hybrids of these four techniques. Optical beamforming is the alternative that is most suitable for true time delay beamforming; the relative bandwidth of the microwave signal referred to the optical carrier is almost zero.
TNO Identifier
95485
Publisher
EuMA
Source title
European Microwave Week 2002 - EuMW 2002 - Proceedings of the 10th European Gallium Arsenide and other semiconductors Application Symposium - GAAS 2002, 23-24 September 2002, Fiera de Milano, Italy.
Place of publication
Louvain-la-Neuve
Pages
7 p.
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