22 December 1997 Compact 2.4-THz 5-bit substrate-guided-wave photonic true-time-delay module for phased array antennas
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Abstract
Photonic true-time-delay (TTD) lines offer many advantages over their electronic counterparts and attract more and more research efforts. In this paper, we report the demonstration of a 32 TTD lines (5-bit) based on substrate guided wave propagation combined with slanted photopolymer volume phase gratings on a quartz substrate. The system design, device fabrication, optimization of fanout intensity uniformity, and device performance evaluation are addressed as well. The fanout beam intensity uniformity is within plus or minus 10%. The packing density is 2.5 delay lines/cm2. The device has a measured bandwidth of up to 2.4 THz and a measured fanout delay step of 50 ps. A 50 GHz optically heterodyned microwave signal is generated, sent through the device, and then detected at the output end.
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Zhenhai Fu, Zhenhai Fu, Richard Liqiang Li, Richard Liqiang Li, Ray T. Chen, Ray T. Chen, } "Compact 2.4-THz 5-bit substrate-guided-wave photonic true-time-delay module for phased array antennas", Proc. SPIE 3290, Optoelectronic Integrated Circuits II, (22 December 1997); doi: 10.1117/12.298253; https://doi.org/10.1117/12.298253
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