Design of 2.4 GHz Transceiver RF Modules for ISM-Band Digital Wireless Communication

• Main Authors: Liu, Sen-You, 劉先祐
• Other Authors: Chuang, Huey-Ru
• Format: Others
• Language: zh-TW
• Published: 1997
• Online Access: http://ndltd.ncl.edu.tw/handle/59306403600079044702

碩士 === 國立成功大學 === 電機工程學系 === 85 === 　　In this thesis, design, implementation, and extensive measurements of a 2.4 GHz RF front-end module for ISM-Band (Industrial, Scientific and Medical band) wireless communication applications are presented. Dual frequency conversion strategy is employed in this RF module (2.4∼2.47 GHz). The frequency range of first LO is from 2.12 GHz to 2.19 GHz and the first IF is 280 MHz. The frequency of the second LO is 335 MHz and the second IF is 55 MHz. TDD duplexing method is adopted in this module controlled by T/R switch. Class-A two-stage power amplifier (24 dBm output power and 31 dBm OIP3) together with pre-amplifier, single-ended resistive mixer (6 dB conversion loss and 7 dB noise figure), and low noise amplifier (21 dB gain and 2.5 dB noise figure) are deigned. The designed hybrid RF circuits are combined with suitable IF RFICs, filters, and switches to form a transceiver RF module (not including the frequency synthesizer). In the transmitting mode, the output power reaches 22 dBm (1-dB gain compression point) after the loss of the T/R switch. In the receiving mode, 15-dB conversion gain, 9-dB noise figure, and -6 dBm 1-dB gain compression point is achieved. As for the digital modulation measurement, the error vector magnitude is EVM□4% (PIN＝-3 dBm) for the transmitting mode and EVM□1% (PIN＝-50 dBm) for the receiving mode. The measurement of ACP (adjacent channel power) has also been performed and discussed.