Modifications of Parallel Coupled Line Filters

• Main Author: 謝仲安
• Other Authors: 王秀仁
• Format: Others
• Language: zh-TW
• Published: 2001
• Online Access: http://ndltd.ncl.edu.tw/handle/32711521072628721276

碩士 === 國立臺灣科技大學 === 電子工程系 === 89 === Recently, because of the booming of global communication market, RF circuits have been applied in many of the communication systems such as IEEE 802.11G, Bluetooth, and GSM. Furthermore, RF circuits and some system components like RF Amplifier, Filter, Mixer, and Oscillator compose most of the fundamental elements of the communication systems. Thus, the RF circuit technologies play an important role in the development of the communication systems. Considering the RF circuit technologies, the micro-strip line is the basic and popular transmission line because of its simple architecture, cost effective, and easy to apply in the print circuit technology. Therefore, we chose the micro-strip line to design the band pass filter and the thesis is written for improving the filter characteristic. The design of the band pass filter is based on the coupling theory of the parallel-coupled microstrip line structure. In the following chapters, methods for reducing the second pass band response were proposed. All e examples in the thesis were performed in real circuits and circuit tested data were compared with the related simulation results and related theories.