| Summary: | 碩士 === 國立交通大學 === 電信工程研究所 === 101 === This thesis employs the phase-comparison mono-pulse system architecture to design a mechatronic system with signal tracking ability. Notably, the direction of incoming wave is confirmed due to the fact that detected phase will have a 180-degree difference between sum and difference ports when system is aligned with propagating direction of incoming wave. The operation frequency of this system is 2.4 GHz. To employ the high-gain characteristic of planar Yagi-Uda antenna, two vertically polarized antennas are placed in parallel arrangement. Besides, the antennas are in series connection with comparator, amplifier, phase detector, and finally a servo motor controlling the rotation of entire system. Specifically, a passive IQ mixer is utilized as phase-detecting component, and NI LabVIEW DAQ is collaborated for system control and data acquisition. System control includes controlling rotation angle, phase measurement, and signal processing. Last but not least, the experimental demonstration shows that this system can track dynamic signal source instantaneously, which is applicable in missile seeker.
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