UHF 功率放大器於遠距收發系統之應用

功率放大器作為射頻前端電路的主要元件，無論從高性能到低成本的設計考量皆扮演著收發系統中的重要角色。有基於此，本論文將針對434MHz與2.45GHz兩部分收發系統做為研究，內容將分成兩大部分：第一部分為收發機控制與測試，第二部分是放大器之射頻前端電路設計與量測，最後再以整合的方式實現一UHF雙頻帶遠距通訊之收發系統。首先探討此系統之整體規劃與元件之選擇評估，其中會分別提出兩頻帶的干擾問題與傳輸距離預測之解決方法。在收發機部分GW200KB與A7125分別為適用於兩頻帶的收發模組，且皆使用FSK之調變/解調可達成短距離之通訊目的。功率放大器部分以434MHz放大模組可以達到44dBm的輸出功率，並且經由外部設計之濾波電路消除其對高頻端的干擾訊號，另外於2.45GHz使用了三級串級功率放大器同樣可達40dBm的輸出功率。在系統的電路佈局與微帶線電路之設計均使用Agilent ADS進行特性模擬，量測上以網路分析儀之SOLT與TRL兩種校正方式降低量測誤差值，務求落實模擬與量測上的準確度，希望能做為往後射頻電路設計之研究參考目標。

關鍵字

434MHz功率放大器； 2.45GHz功率放大器；收發機

並列摘要

Power amplifiers (PA) have played an important role in the development of high-performance or low-cost solutions for RF transceivers. This thesis presents the research on 434MHz and 2.45GHz dual-band transceiver modules. The main topics including transceiver、power amplifier and full module circuit design for the UHF long distance transceiving application. The overall system planning and components selection will be focused at first, then both the interference problem and transmission distance are described. As a part of basic transceiver modules, GW200KB and A7125 are suitable for above two different bands. Both can transceiving data in short range by using the same FSK modulation. The design of 434MHz PA can achieve the average output power at 43 dBm, and by filtering for interference cancellation. The performance of 2.45GHz PA can same achieve 43dBm by cascade three stage of PAs. Finally, Agilent ADS is used to integrate the co-simulation design and the circuit layout. By using SOLT and TRL calibration helps to keep more accurate measure result.

並列關鍵字

434MHz Power Amplifie ； 2.4GHz Power Amplifier ； ransceiver

參考文獻

[14]黃嘉倫，2.4GHz遠端追蹤控制系統之設計與實現，碩士論文，國立台北科技大學電腦與通訊研究所，臺北，2012。

[1]Andrei Grebennikov, RF and microwave transmitter design, Wiley, 1 edition, July 12, 2011.

[2]Inder J. Bahl, Fundamentals of RF and microwave transistor amplifiers, Wiley -Interscience, June 15, 2009.

[3]Steve C. Cripps, RF power amplifiers for wireless communications, Artech House, 1999.

[4]Steve C. Cripps, Advanced Techniques in RF Power Amplifier Design, Artech House Print on Demand, June 15, 2002.

國際替代計量

UHF 功率放大器於遠距收發系統之應用

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