Analytical Design of Microstrip Short-Circuit Terminated Stepped-Impedance Resonator Dual-Band Filters
Analytical Design of Microstrip Short-Circuit Terminated Stepped-Impedance Resonator Dual-Band Filters
复制标题
DOI：
10.1109/tmtt.2011.2132140
复制
发表时间：
2011-04
影响因子：
4.3
通讯作者：
W. Chang;Chi-Yang Chang
中科院分区：
文献类型：
--
作者：
W. Chang;Chi-Yang Chang
提出了一种利用短路终端半波长阶跃阻抗谐振器(SIR)设计双频变送器的解析方法。SIR的优点是通过调整其结构参数可以很容易地控制第一和第二共振。在该方法中，SIR的结构参数是根据滤波器的两个通带中心频率和带宽解析得到的。结果，可以快速确定双频段滤光器的可实现的技术指标。相邻SIR之间的耦合通过一个短路来实现，该短路短路具有K-逆变器网络的特征。外部耦合采用带有抽头线输入/输出结构的双频变压器。在设计过程中应用解析式，可以方便、快速地实现双频段滤波器。更重要的是，与已有的双带滤波器相比，该方法更易于设计，特别是对于相对高阶的双带滤波器。设计并制作了两个四阶和一个六阶双频滤光片，验证了该方法的有效性。
This paper proposes an analytical method to design a dual-band Alter using the short-circuit terminated half-wavelength stepped-impedance resonator (SIR). The SIR has an advantage to easily control the first and second resonances by adjusting its structural parameters. In the proposed method, the structural parameters of the SIR are obtained analytically according to the two passband center frequencies and bandwidths of the filter. As a result, the achievable specifications of the dual-band filter can be rapidly determined. The coupling between adjacent SIRs is realized by a short-circuited stub, which is characterized as a K-inverter network. The dual-frequency transformer incorporated with the tapped-line input/output structure is used for the external coupling. Applying the analytical equations in the design process, a dual-band filter can be easily and quickly realized. More importantly, compared to the published dual-band filters, the proposed method is easier to design, especially for a relatively high-order dual-band filter. Two fourth-order and one sixth-order dual-band filters are designed and fabricated to demonstrate the proposed method.