LTCC Bandpass Filter Chips With Controllable Transmission Zeros and Bandwidths Using Stepped-Impedance Stubs

IF 4 2区工程技术 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC

IEEE Transactions on Circuits and Systems II: Express Briefs Pub Date : 2022-01-13 DOI:10.1109/TCSII.2022.3142935

Wei Zhao;Yongle Wu;Yuhao Yang;Weimin Wang

引用次数: 2

Abstract

A novel bandpass filter (BPF) chip using stepped-impedance stubs (SISs) embedded in coupled lines (CLs) based on the low-temperature cofired ceramic (LTCC) technology is proposed in this brief. The controllable bandwidth (BW) is mainly realized by the wide range of variable coupling strength of the broadside CLs, and the controllable transmission zeros (TZs) can be generated by SISs to obtain high selectivity. Furthermore, in order to obtain a general design method for the proposed BPF with different BWs, the analytical (closed-form) process based on the even- and odd- mode analysis method is presented. For verification, a prototype for the proposed BPF operating at 3.5 GHz with the 3-dB fractional bandwidth (FBW) of 32.0% is designed, simulated, fabricated, and measured, respectively. Finally, the measured results that are in good agreement with the simulation show good performance of the proposed circuit.

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基于阶跃阻抗短截线的具有可控传输零点和带宽的LTCC带通滤波器芯片

本文提出了一种基于低温共烧陶瓷（LTCC）技术的新型带通滤波器（BPF）芯片，该芯片采用嵌入耦合线（CL）的阶梯阻抗短截线（SIS）。可控带宽（BW）主要通过宽边CL的可变耦合强度范围来实现，并且可控传输零点（TZs）可以由SIS产生以获得高选择性。此外，为了获得所提出的具有不同BWs的BPF的通用设计方法，提出了基于偶模和奇模分析方法的分析（闭合形式）过程。为了验证，分别设计、模拟、制造和测量了所提出的BPF的原型，其工作频率为3.5GHz，3dB分数带宽（FBW）为32.0%。最后，测量结果与仿真结果吻合良好，表明该电路具有良好的性能。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

IEEE Transactions on Circuits and Systems II: Express Briefs 工程技术-工程：电子与电气

CiteScore

7.90

自引率

20.50%

发文量

883

审稿时长

3.0 months

期刊介绍： TCAS II publishes brief papers in the field specified by the theory, analysis, design, and practical implementations of circuits, and the application of circuit techniques to systems and to signal processing. Included is the whole spectrum from basic scientific theory to industrial applications. The field of interest covered includes: Circuits: Analog, Digital and Mixed Signal Circuits and Systems Nonlinear Circuits and Systems, Integrated Sensors, MEMS and Systems on Chip, Nanoscale Circuits and Systems, Optoelectronic Circuits and Systems, Power Electronics and Systems Software for Analog-and-Logic Circuits and Systems Control aspects of Circuits and Systems.