In this paper, the wireless power distribution system for optogenetic experiment was demonstrated. The design and the analysis of the power transfer system development is described in details. The architecture is outlined in the context of performance requirements that had to be met. We show how to design a wireless power transfer system using resonant coupling circuits which consist of a number of receivers and one transmitter covering the entire cage area with a specific power density. The transmitter design with the full automated protection stage is described with detailed consideration of the specification and the construction of the transmitting loop antenna. In addition, the design of the receiver is described, including simplification of implementation and the minimization of the impact of component tolerances on the performance of the distribution system. The conducted analysis has been confirmed by calculations and measurement results. The presented distribution system was designed to provide 100 mW power supply to each of the ten possible receivers in a limited 490 x 350 mm cage space while using a single transmitter working at the coupling resonant frequency of 27 MHz.
In this paper a concept of a cheap, lightweight, low power satellite radar for Moon's surface mapping is presented. This radar is designed to work in two modes: two-dimensional imaging (Synthetic Aperture Radar - SAR) and three-dimensional imaging (Interferometric Synthetic Aperture Radar - IfSAR). The proposed radar system performs the functions both of a radar system and a high data rate communication system. This enables costs and weight reduction which is very important in space applications.
Proc. SPIE. 5948, Photonics Applications in Industry and Research IV
KEYWORDS: Signal to noise ratio, Digital signal processing, Oscillators, Field programmable gate arrays, Digital imaging, Signal processing, Analytical research, Analog electronics, Frequency conversion, Electromagnetism
The paper concerns frequency conversion circuits of electromagnetic field stabilization system in superconductive cavity of linear accelerator. The stabilization system consists of digital part (based on FPGA) and analog part (frequency conversions, ADC/DAC, filters). Frequency conversion circuit is analyzed. The main problem in the frequency conversion for the stabilization system are: linearity of conversion and stability. Also, second order problems are subject of analysis: control of local oscillator parameters and fluctuation of actuated signal (exposing conversion). The following work was done: analysis of individual stage parameters on field stability and external influence, simulation. The work was closed with conclusions of the major frequency conversion parameters for field stabilization.
The results have been applied for field stabilization system (RF Feedback System) in TESLA Test Facility 2 and preliminary research on X-Ray Free Electron Laser.
The paper presents a design and realization of the fast and synchronous data transmission system for the RPC Muon Trigger in the CMS experiment. There is described a method of data distribution system design on the TriDAQ board. The solution takes into account the realization methods of particular building components of the involved transmission channels. The chosen solution enables signal distribution originating from the multi gigabit optical links. The data signals are transmitted from the RPC chambers to the trigger processors and to the data acquisition block. The distribution network was build using a differential standard of data transmission -- the LVDS (low voltage differential signaling system). The solution applied practically for building a dedicated PCB is described.
The paper presents accuracy analyses of digital compression line which consists of digital quadrature detector, simple decimator and matched filter. Up to now analogue quadrature detectors are commonly used for many applications. These detectors suffer from bias and channel balance problems. However, the problem disappears while using digital solution. The main goal was to decrease the computation complexity needed for the processing without loosing the detection accuracy. It was achieved by using the class of digital quadrature detector with sampling frequency four times of IF frequency and simple phase correction filters.