Design and Analysis of the RF Transceiver for Bluetooth Communications System

• Main Authors: Phun-Fei Teo, 張棚斐
• Other Authors: Man-Long Her
• Format: Others
• Language: en_US
• Published: 2003
• Online Access: http://ndltd.ncl.edu.tw/handle/57983786402045929847

碩士 === 逢甲大學 === 電子工程所 === 91 === Abstract The purpose of this thesis is to design and analysis of the RF transceiver for Bluetooth communications systems. In our research, we focus on the hardware of RF transceiver in ISM 2.4 GHz band. We have designed and implemented the RF transceiver for Bluetooth wireless communications by combining all the sub-circuits. Besides we also analyzed the structure and measured all the performances of the sub-circuits. In our design, low cost, low power consumption, high output efficiency and other characteristics have been taken considerations. For the RF transmitter, we have completed the design of RF Bandpass Filter, Tx/Rx Switch, MA02305AK 100 mW PA, Doubly Balanced Mixer and Balun for the antenna of the transmission module. However, the completed RF receiver part includes RF Bandpass Filter, Tx/Rx Switch, Low Noise Amplifier, Doubly Balanced Mixer and Balun. On the other hand, we also implemented a Phase Locked Loop (PLL) Synthesizer with the operating frequency at 2.4 GHz. According to the frequency hopping spread spectrum of Bluetooth communications system, this PLL Synthesizer can be operated from about 2.3 GHz to 2.5 GHz. Finally, we implemented a Bluetooth RF front-end transceiver, which includes down converter and up converter. The performances of down converter are: conversion gain is about 10 dB, 1-dB compression point is about –18 dBm, 3rd order intercept point is about –4.17 dBm and both the RF and LO port return loss are less than –10 dB. The performances of up converter are: The conversion gain is about 8.5 dB, output power is 17.47 dBm, 1-dB compression point is about 10 dBm, 3rd order intercept point is about 20 dBm and both the RF and LO port return loss are less than –16 dB. From the above mentioned measurement results, the down converter and up converter can meet well the requirements of the Bluetooth wireless communications system.