The Design of a Dual-band Transceiver RF front-end integrated circuit for WLAN/WiMAX Applications

• Main Authors: Yueh-Ting Chiang, 江岳庭
• Other Authors: 楊正任
• Format: Others
• Language: zh-TW
• Published: 2009
• Online Access: http://ndltd.ncl.edu.tw/handle/36111580119053365178

碩士 === 元智大學 === 通訊工程學系 === 97 === ABSTRACT In order to conform to the trends which are WLAN/WiMAX dual-band system and CMOS technology, we study in dual-band CMOS transceiver. This thesis presents and implementation of a receiver and a transmitter in TSMC 0.18um RF CMOS process. Both of them are designed to meet the requirement of specifications which are WiMAX 802.16e mobile and WLAN 802.11a. The compact dual-band low voltage receiver RF front-end integrated circuit is consisting of broad-band LNA, down mixer and variable gain IF balun. This design achieves low power consumption with low supply voltage and compact size by employing a transformer structure LNA. Finally, we design a variable gain IF balun to improve the linearity of this receiver. The compact dual-band transmitter RF front-end integrated circuit is consisting of dual-band PA and high linearity up-mixer. The CMOS PA is using a dual-band matching network to supply high output power at two bands. Finally, we design a high linearity mixer base on transformer in order to reduce the number of RF cascade amplifiers and chip size.