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The defense date of the thesis is 2009-08-14
The current date is 2019-02-18
URN etd-0812109-014024 Statistics This thesis had been viewed 1605 times. Download 4 times. Author Ming-Fu Kuo Author's Email Address No Public. Department Communication Engineering Year 2008 Semester 2 Degree Master Type of Document Master's Thesis Language English Page Count 90 Title A RFID Image Detection System for Invisible Objects Keyword image detection RFID RFID image detection Abstract The main purpose of this thesis is to design an object-detection system by RFID. We use the UHF band passive RFID system to implement this idea. Its operation frequency band is from 860 MHz to 960 MHz. We design the UHF broadband reader antenna by adopting the configuration of layer-stacked patch antenna to conform this requirement. And in order to make the omni-directional antenna radiation pattern, this antenna is a circular patch, so that the antenna radiation pattern will become omni-directional in the particular mode. We also design the RFID tag by the concept of complex conjugate. And its design process and experiment results will be introduced in the following chapters.
In this thesis, we introduce a new concept of “negative-detection”. That is the main focus on this study. We use the passive RFID tags as the sensors and spread them all over the monitoring area. We can identify which tag is hided by its on-off echo response. And by capturing the locations of silent tags, the moving trace of this detected object can be presented. Even if the monitoring environment is dark, this system can still work normally. So when monitoring about the objects that is invisible for the video cameras, this system is more useful for the application than video cameras in security system.
Advisor Committee Chi-Fang Huang - advisor
none - co-chair
none - co-chair
Files Date of Defense 2009-07-08 Date of Submission 2009-08-14