| Summary: | 碩士 === 國立中央大學 === 通訊工程研究所 === 91 ===
The major contents of our thesis are to introduce the principles and architectures of up-converter and down-converter .To describe related theorems and to discuss the design rule and flow of each functional components of RF transceiver are our major purpose . The functional components are including VCO, Mixer, Filter, and Amplifier , we have already introduced and measured each important parameter of the functional components in our thesis.
The introduction chapter of RF transceiver architecture is to introduce the theorems and difference between Super-heterodyne and Homodyne architecture. How choice the IF frequency well is an important topic in transceiver design and we have discussed about it in the chapter .In the chapter of VCO introduction, the VCO circuit applied in 375 MHz has been designed and implemented by using negative resistance theorem. In the portion, we introduce the actual design flow, related considerations, and important measurement for system applications of VCO sub-circuit. In the chapter of Mixer introduction, we have utilized the single-end active mixer to up-convert signal from 65 MHz to 375 MHz successfully. And all important parameters for system applications of mixer have been measured and discussed .In the portion of microwave filter, we design and implement the BPF applied in 5.3 GHz band by using couple transmission line and it have excellent rejection ability of harmonics after proper modification. The BPF designed by lump element have compared each important parameter with SAW filter applied in 375 MHz .In the portion of amplifier, we have introduced of varieties and applications of microwave amplifier. We have utilized an example, a high gain amplifier of 375 MHz, to introduce the design concepts and actual flow. And the high gain amplifiers of 4.925 GHz and 5.3 GHz have been designed and implemented. Each important parameter has been measured .Finally, we integrated each functional component to achieve up-converter and down-converter. We have measured each important parameter and discussed related issues in the chapter, too.
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