應用於無線固定機之本地震盪器電路研製

Local Oscillator Circuits Design for Wireless Access Fixed Unit

陳文林(Wen-Lin Chen)

指導教授 ： 鄭獻勳 ； 繆紹綱

中原大學/工學院/電子工程研究所/碩士(2002年)

https://doi.org/10.6840/cycu200200298

摘要

隨著現代無線電信與雷達系統的誕生，在調變信號與信號混波時，我們需要一個能提供特定頻率的振盪器來完成調變與混波的動作。就PACS無線固定機(WAFU)系統而言，我們設計的目標必須放在振盪器的穩定性與小型化上。
在本論文中有兩個主要的部份：第一部份介紹了壓控振盪器的設計觀念與實測結果。在第二部份中，我們針對鎖相迴路做了些說明，並對實際測量結果做一報告。在這次的研究當中，我們利用一般實驗室比較容易做得到的印刷電路板混成積體化製程技術來完成微波本地振盪器的研製。
本壓控振盪器是利用負阻抗與大信號等效電路模型的觀念來分析。在可調頻率範圍1560MHz到1620MHz中，壓控振盪器的相位雜訊在100KHz處都是小於100dBc/Hz。其輸出功率皆在2dBm以上。再者，鎖相迴路的電路也已經完成，並且其效能完全可以符合PACS系統中無線固定機(WAFU)的需求。

關鍵字

本地震盪器 ； 無線固定機

並列摘要

With the advent of modern radio and radar system came the need to provide stable oscillations at particular carrier frequencies to establish the require modulation and mixing conditions. Considering PACS Wireless Access Fixed Unit (WAFU) system application, the design target was focused on stability and minimization.
This thesis consists of two main parts: The first part introduces the concept of VCO design methods and measurement results. The second part describes the concept of PLL, implementation and test results. In this research, we have implemented the microwave local oscillator on PCB with hybrid integration circuit that is easy to fabricate in the lab.
The VCO was analyzed by negative resistance concept and large signal equivalent circuit model. In the tuning range from 1560 MHz to 1620MHz, the phase noise of VCO was below 100dBc/Hz offset at 100KHz. The output power was larger than 2dBm. Moreover, the circuit of PLL was accomplished, and the performance of PLL circuit met the requirement of PACS WAFU system.

並列關鍵字

Local Oscillator ； Wireless Access Fixed Unit

參考文獻

[1]BFG520 data sheet, Philips.

[4]塗金益，小型化微波壓控振盪器之設計與製作，元智大學電機資訊工程研究所碩士論文，1998.

[6]Jwo-Shiun Sun, “Design A Frequency Synthesizer For Mobile Communication System,” Microwaves & RF, pp.63-72, November 2000.

[2]張鴻埜，模組化微波訊號源於無線通訊之應用，中央大學電機系碩士論文，1998.

[3]Reinhold Ludwig and Pavel Bretchko, “RF Circuit Design Theory and Applications,” chapter 10, Prentice Hall, 2000.