Optimization of a Photonically Controlled Microwave Switch and Attenuator

Intermodulation distortion in a photoconductive microwave switch

“…In principle, silicon dice can be illuminated to alter operating frequency, with a similar approach used to also reconfigure beam direction [2] and polarization [3]. Optically controlled switches have also been reported in attenuators [4] and filters [5]. Particularly in the case of miniature filter design, the design of the biasing lines needed to operate these components must be considered carefully and can sometimes be a limitation on the size and layout of the device.…”

Optimising the performance of an optically controlled microwave switch

“…Flemish et al were able to improve the performance of their optically controlled attenuator by optimising the dimensions of their component's layout [6]. Gevorgian links optical losses for an optically excited semiconductor to the width of the gap in the transmission line topology [7].…”

A planar ultrawideband antenna with photonically controlled notched bands

“…The research of optically controlled microstrip switches started in 1970s [1]- [2] and is continuing throughout to today. References have reported devices fabricated from coplanar waveguides and microstrip transmission lines printed on silicon substrate [3], [4]. The simple microwave switch [5] was applied in designs of antennas, filters, phase-shifters and couplers [6].…”