本論文利用不同負載阻抗的X參數大訊號模型來預測[1]砷化鎵假晶式高速電子遷移率封裝電晶體的等功率圓以獲得最大輸出功率，其預測出的最佳輸出特性與傳統負載拉移之結果相當一致，此方法相較於傳統負載拉移更為方便快速。利用預測出的最佳輸出功率特性作為設計單級功率放大器方式，再進一步擴展到雙級功率放大器，提升其輸出功率及功率增益。此新穎的方式有助於在射頻領域設計功率放大器。

The prediction of maximum output power [1] for packaged GaAs pHEMT implement by power contour determined from the X-parameter model at different load impedance. The optimum output power characteristic is in good agreement between the result of the prediction and conventional load-pull. This method is more convenient than conventional load-pull method. Using the optimum output power characteristic of prediction for single-stage power amplifier design can be further extended to two-stage power amplifier for increasing its output power and power gain. This novel method is useful for RF power amplifier design.

誌謝 ii
中文摘要 iii
Abstract iv
目錄 v
圖目錄 vi
表次 viii
第一章 緒論 1
1.1 研究背景與動機 1
1.2 章節規劃 3
第二章 功率放大器的分類與性能參數 4
2.1 功率放大器的分類 4
2.2 功率放大器的性能參數 11
第三章 X參數模型應用於功率放大器 17
3.1 X參數基本介紹 17
3.2 X參數預測最佳阻抗點與功率點 17
3.3 功率放大器設計方式與架構 21
3.4 功率放大器設計流程 22
第四章 功率放大器量測與結果 24
4.1 簡介 24
4.2 量測儀器與量測架構 25
4.3 功率放大器實驗結果 27
4.4 X參數模型帶入電路與比較 32
第五章 結論與未來展望 35
參考文獻 36

[1] C. Baylis, R. J. Marks, J. Martin, H. Miller, and M. Moldovan, "Going Nonlinear," IEEE Microwave Magazine, vol. 12, no. 2, pp. 55-64, 2011.
[2] D.M.Pozar, Microwave Engineering, 3rd ed.: John Wiley, 2005
[3] H. G. Joujili, M. Mivehchy, and M. Habibi, "A Novel Analytical Design Approach for Determining the Optimum Load to Minimize Harmonic Output Power Based on X-Parameters," IEEE Transactions on Microwave Theory and Techniques, vol. 64, no. 11, pp. 3492-3500, 2016.
[4] A. M. Pelaez-Perez, S. Woodington, M. Fernandez-Barciela, P. J. Tasker, and J. I. Alonso, "Application of an NVNA-Based System and Load-Independent X-Parameters in Analytical Circuit Design Assisted by an Experimental Search Algorithm," IEEE Transactions on Microwave Theory and Techniques, vol. 61, no. 1, pp. 581-586, 2013.
[5] A. Zubow and R. Sombrutzki, "Adjacent channel interference in IEEE 802.11n," in 2012 IEEE Wireless Communications and Networking Conference (WCNC), 2012, pp. 1163-1168.
[6] G. Casini, A. Cidronali, and G. Manes, "Investigation of X-parameters modeling for accurate envelope tracking power amplifier system simulations," in 2013 IEEE MTT-S International Microwave Symposium Digest (MTT), 2013, pp. 1-4.
[7] A. Rasmi, A. Marzuki, M. A. Ismail, N. A. Ngah, and A. I. A. Rahim, "Two-stage MMIC medium power amplifier using depletion mode PHEMT for 5.8GHz applications," in RSM 2013 IEEE Regional Symposium on Micro and Nanoelectronics, 2013, pp. 215-218.
[8] A. Rasmi, A. Marzuki, M. R. C. Rose, I. M. Azmi, and A. I. A. Rahim, "A 2.4 GHz packaged power amplifier using GaAs PHEMT technology," in 2011 IEEE Regional Symposium on Micro and Nano Electronics, 2011, pp. 148-151.
[9] A. Rasmi, M. R. C. Rose, A. I. A. Rahim, and A. Marzuki, "2.4 GHz GaAs PHEMT medium power amplifier for wireless LAN applications," in 2010 IEEE International Conference of Electron Devices and Solid-State Circuits (EDSSC), 2010, pp. 1-4.
[10] G. Simpson, "High power load pull with X-parameters - a new paradigm for modeling and design," in 2010 IEEE 11th Annual Wireless and Microwave Technology Conference (WAMICON), 2010, pp. 1-4.
[11] T. Fischer, M. Spang, and M. Albach, "Easy de-embedding of symmetrical coax-to-microstrip transitions," in 2008 12th IEEE Workshop on Signal Propagation on Interconnects, 2008, pp. 1-4.