The authors report a novel approach for designing tunable and reconfigurable bandstop filters by employing bias-free optically-controlled photoconductive radio frequency (RF) switching elements. To verify the effectiveness of approach, filter with two stopbands centred at 4.05 4.75 GHz was designed using split-ring-coupled microstrip transmission line on RO3010 substrates. enable reconfigurabil...

We give a closed-form expression for the discounted weighted queue length and switching costs of a two-class single-server queueing model under a preemptive priority rule. These expressions are used to do a single step of policy iteration in a polling model with a dynamically controlled switching rule, starting from the preemptive priority rule. Numerical experiments show that this leads to a p...

The switching magnet for beam distribution is served with Digital Signal Processor (DSP) controlled PWM switching-mode power supply (SMPS). This SMPS is employed phase-shifted parallel (PSP) operation of IGBTs. This technique allows ± 350 A, 2.5 Hz stair output, and ± 350 A at bipolar mode operation. Current feedback and input voltage feed-forward control schemes are applied to improve the outp...

The IlluminatIR™ is commonly used with either a diamond contact ATR (attenuated total reflection) or a diffuse reflectance objective. The sample can be viewed, and Raman spectra collected, either through these objectives or through the high quality microscope objectives supplied with the inVia Raman microscope. Simple switching between video view, IR acquisition, and Raman acquisition allows IR...

We introduce a novel device for optical switching by using the position shift of the spatial soliton after collision. The device is a one-to-three switching device controlled by two control beams. For the optimum signal power, the transmission efficiency is above 95%. The wave propagation in the structure and the transmission efficiency as a function of input signal power are shown and discussed.