WLAN/WiMAX雙模接收機降頻器之研製

The Study and Implementation of WLAN/WiMAX Dual-Mode Receiver Down-Converter

蘇柏綱(Po-Kang Su)

指導教授 ： 楊正任

元智大學/電機通訊學院/通訊工程學系/碩士(2007年)

摘要

本論文研製之WLAN/WiMAX雙模接收機降頻器係以TSMC 0.18μm 1P6M CMOS製程製作完成。設計之CMOS RFICs包括：同時共用雙頻帶低雜訊放大器、CMOS寬頻微混頻器以及可切換雙頻帶壓控振盪器。其中同時共用雙頻帶低雜訊放大器經量測結果後，在WLAN 802.11b/g頻帶(2.4GHz)增益為10.3dB，雜訊指數為4.33dB，輸入P1dB為-17dBm，輸入三階截斷點為-7dBm；在WiMAX 802.16d頻帶(3.5GHz)增益為7.8dB，雜訊指數為5.72dB，輸入P1dB為-14dBm，輸入三階截斷點為-5dBm。CMOS寬頻微混頻器經模擬後，頻寬為0.15~3.9GHz，WLAN 802.11b/g頻帶(2.4GHz)轉換增益為3.69dB，輸入P1dB為-10.6dBm，輸入三階截斷點為-2.5dBm；WiMAX 802.16d頻帶(3.5GHz)轉換增益為2.64dB，輸入P1dB為-11.1dBm，輸入第三階截斷點為-3dBm。可切換雙頻帶壓控振盪器經模擬後，其低頻帶和高頻帶操作頻率分別為2.39與3.45GHz，在0~1.5V控制電壓其輸出頻率為2.374~2.419GHz與3.396~3.527GHz，相位雜訊分別為-126.4dBc/Hz@1MHz與-116.7 dBc/Hz@1MHz。

關鍵字

雙模接收機 ； 低雜訊放大器 ； 混頻器 ； 壓控振盪器

並列摘要

This thesis presents the study and implementation of WLAN/WiMAX dual-mode receiver down-converter in a TSMC 0.18μm 1P6M CMOS process. The design of CMOS RFICs includes concurrent dual-band LNA, CMOS wide-band MICROMIXER and switched dual-band VCO. In the measurement results of concurrent dual-band LNA for WLAN 802.11b/g (2.4GHz), the gain is 10.3 dB, the NF is 4.33 dB, the input at 1-dB gain compression point is -17 dBm, and input at the third order intercept point is -7 dBm. Furthermore, the gain is 7.8 dB, the NF is 5.72 dB, the input at 1-dB gain compression point is -14 dBm, and input at the third order intercept point is -5 dBm for WiMAX 802.16d (3.5GHz). In the simulation results of CMOS wide-band MICROMIXER, the bandwidth is 0.15~3.9 GHz, the conversion gain is 3.69 dB, the input at 1-dB gain compression point is -10.6 dBm and input at the third order intercept point is -2.5 dBm for WLAN 802.11b/g (2.4GHz). Besides, the conversion gain is 2.64 dB, the input at 1-dB gain compression point is -11.1 dBm and input at the third order intercept point is -3 dBm for WiMAX 802.16d (3.5GHz). In the simulation results of switched dual-band VCO, the lower band and higher band of the frequency-controlled ranges are 2.39 GHz and 3.45 GHz respectively. Otherwise, the output frequency with 0~1.5V voltage-controlled are 2.374~2.419 GHz and 3.396~3.527 GHz respectively. The corresponding phase noise are -126.4 dBc/Hz@1 MHz and -116.7 dBc/Hz@1 MHz respectively.

並列關鍵字

WLAN ； WiMAX ； Dual-mode receiver ； LNA ； Mixer ； VCO

參考文獻

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