應用於車庫捲門之無線遙控器性能改善機制與研究

Abstract

針對應用在ISM Band(Industrial Scientific Medical Band)上使用之無線遙控器，本文提出一個低成本，高安全性，並且符合SRRC(State Radio Regulatory Commission) 驗証的ASK(Amplitude-Shift Keying)發射器，並搭配由普誠科技所生產之低功率超外差式接收器(Low Power Super-heterodyne Receiver)PT4303所組成的高靈敏度接收模組，組成一套無線鐵捲門控制系統。此系統遙控端具有電路簡單、易於生產的優點。不僅改善了傳統的遙控器容易被拷貝的缺點，大大提昇了用戶的安全性，也針對市面上的發射器容易產生二次諧波的幅射做了大幅的改善。

In this thesis, a low cost and high security wireless remote control system is proposed. The wireless remote control system consists of transmitter and receiver. In the transmitter part, a surface acoustic wave based oscillator application circuit with hopping code encoder integrated circuit is used, achieving a State Radio Regulation Commission certificated amplitude-shift keying modulation transmitter. In the receiver part, a low power super-heterodyne receiver PT4303 is used, composing of high sensitivity receiver module. This system not only enhance the shortcomings of traditional remote control and the problem of being easily copied issue, but can resolve the second harmonic radiation problem.