利用功率分配器與結合器提升功率放大器線性操作範圍之研究

本論文研究目的在於利用威爾金森功率分配器及威爾金森功率結合器來並聯兩個相同且低成本的功率放大器做成一個高線性功率輸出的放大器模組。以達到放大器模組比單顆放大器能多出3dB的線性輸出功率。一般在設計高功率放大器單顆微波積體電路(MMIC)時難度非常高，特別是在晶片上很難得到最佳的阻抗匹配和線性度。因此本論文研究利用威爾金森功率分配器及結合器將兩個功率放大器做並聯結合，以獲得增加3dB得到較佳線性度和較佳之功率輸出。在本論文中首先對威爾金森功率分配器/結合器模擬、設計及實做量測介紹。再對單顆及以威爾金森功率分配器/結合器並連功率放大器模組針對實做部分以CW信號做P1dB及以802.11g調變信號EVM做輸出功率線性度量測及比較。

關鍵字

威爾金森功率分配器；威爾金森功率結合器

並列摘要

This paper research aims at using Wilkinson power divider and Wilkinson power coupler to combine two same and low cost power amplifiers to make a high linear power booster module. This design can achieve 3dB more output power and to obtain the good linearity. Generally specking, to design the high power amplifier using single monolithic microwave integrated circuit (MMIC) is highly difficult, especially to obtain the best impedance matching and linearity on chip. Therefore, this study combined two power amplifiers by using Wilkinson power divider and Wilkinson power coupler to increase 3dB output power and better linearity. In this research, firstly to introduce the Wilkinson power devider/combiner simulation, design and practical measurement as gauging. And then focusing on comparing the linear output power with single power amplifier and Wilkinson power divider/coupler booster module by measuring CW signal for P1dB and measuring 802.11g modulation for EVM performance.

並列關鍵字

Wilkinson power divider ； Wilkinson power coupler

參考文獻

[1] E. Wilkinson, “An N-way Hybrid Power Divider,” IRE Trans. On Microwave Theory and Techniques, vol. MTT-8, pp.116-118, Jan 1960.

[2] K. M. Eisele, R.S. Engelbrecht, and K. KuroKawa, “Balanced Transistors Amplifiers for Precise Wideband Microwave Application,” IEEE Int. Solid State Circuits Conf. pp.18-19, Feb 1965.

[3] S. C. Cripps, RF Power Amplifiers for Wireless Communications, Artech House, 2006.

[4] IEEE 802.11.g RF regulations.

[8] A. Grebennikov, RF and Microwave Power Amplifier design, McGraw-Hill, 2005.

國際替代計量

利用功率分配器與結合器提升功率放大器線性操作範圍之研究

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