二種縮小化環型帶通濾波器設計

Abstract

本文提出兩種設計帶通濾波器的方法，第一種主要是設計一個環型帶通濾波器並改變訊號在電路中的行徑路徑，而產生與傳統環型濾波器一樣-270度相位的改變，並達到縮小面積的要求。而另一種主要是利用左手傳輸線與右手傳輸線相位響應剛好相反的特性，來設計一個可預測傳輸零點的帶通濾波器，由於我們利用集種式元件，實際所需要的面積非常的小。

The thesis discusses two novel methods to design a bandpass filter. The first one is a dual-mode ring resonator bandpass filter where a twist circuit is involved in the signal path to achieve a -270o phase shift as the as the traditional dual-mode ring resonator bandpass filter to achieve the size reduction. The second one utilizes the feature that the phase response of right-handed transmission lines and left-handed transmission lines are opposite to design a bandpass filter with a predictable transmission zero. And since we use lumped elements to implement the bandpass filter, the size of the structure is very small.