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This paper introduces a simulation software, named Simatrix, for designing millimetre-wave reflector antenna and transmission system based on Diffracted Gaussian Beam Analysis. DGBA is a fast and modularized method for quasi-optical system (QOS) analysis. The Simatrix offers the functionalities of modeling and simulating 3D asymmetrical QOS, designing systems which contain shaped-mirror reflectors...
We introduce a data acquisition (DAQ) system for frequency-locking in Direct Detection Doppler Wind LIDAR (DWL). In DWL, double-edge technique based on Fabry-Perot etalon is used to detect the frequency shift. Tiny frequency shift could distinctly reflected in amplitude of output pulse from Photomultiplier Tube (PMT). Nevertheless, outgoing laser frequency is sensitive to temperature changes. Moreover,...
The use of sub-millimeter wave radiometer on the geostationary orbit meteorological satellite is of great significance to the study of the Earth's atmosphere. This paper presents a single-channel quasi-optical network system around 325GHz. The diffracted Gaussian beam analysis method (DGBA) and a three dimensional visual software based on it are used. This design is used in the sub-millimeter radiometer...
The efficiency and accuracy of the method diffracted Gaussian beam analysis (DGBA) has been validated by the commercial software GRASP, but the deficiency that it is only capable of analyzing 2D symmetrical quasi-optical systems limits its applications. In this paper, an extension to the 2D DGBA software is made to make it capable of analyzing 3D asymmetrical quasi-optical systems. And the results...
Originally investigated as a candidate common data format, NeXus was an easy choice when ISIS developed the present PC-based acquisition system. After over ten years of use there was a clear need to revisit the original instrument definition to improve utility, and this work is discussed in the paper. Using NeXus has opened up the possibility of accessing analysis codes developed by the wider scientific...
“Communication Principle” is the compulsory course for Electronic Information Engineering specialty. This paper designs the web teaching system of “Communication Principle”. It has achieved the remote browsing, information dissemination, resources downloads, simulation, exercises, BBS interactive, teaching effectiveness evaluation, and so on for the teaching contents. The online teaching object of...
The goal of this paper is to provide a easy way for manipulating 3D graphical object in remote education system. We describe a remote collaborative framework running in an augmented reality environment. It provides a nature operation interface for manipulating graphics object in the Web browser or applications from different locations. A Jabber like protocol is designed to translate geometry information...
With SOPC technology uncooled focal plane infrared (IR) imaging system has smaller size, lower power consumption and better performance. The paper designs and implements a real time infrared imaging processing system based SOPC. Using UL 01 01 1 IR detector from ULIS as basic sensor, Cyclone I FPGA from Altera as central processor, the system completes data acquisition, image processing and outputting...
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