CADMAN, D. ... et al., 2000. Simulation results for a novel optically-controlled photonic bandgap structure for microstrip lines. IN: Proceedings of 2000 5th IEEE High Frequency Postgraduate Student Colloquium, Dublin, Ireland, 7-8 September 2000, pp.110-115.
A novel optically controlled one dimensional (1D) photonic bandgap (PBG) microstrip structure is proposed. This device consists of a 50 /spl Omega/ microstrip transmission line and a PBG ground plane both deposited onto a photoconductive substrate. With no optical illumination the structure exhibits a well-defined stopband. When light is focused through the holes in the ground plane and onto the substrate, electron-hole pairs are generated to form a photoinduced plasma. This increases the conductivity of the exposed region of the substrate and forms a complete ground plane. The structure then acts as a conventional microstrip line and the bandstop characteristics are switched off. S-parameter simulation results are presented.
The author would like to thank the Engineering and Physical Science Research
Council and Elettronica Systems Limited for the funding of this research.