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首页> 外文期刊>International journal of RF and microwave computer-aided engineering >Design of pseudoelliptic filters with controllable transmission zeros using high-Q double-layer suspended stripline resonators
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Design of pseudoelliptic filters with controllable transmission zeros using high-Q double-layer suspended stripline resonators

机译：使用高Q双层悬浮带状线谐振器设计具有零透射率的伪椭圆滤波器

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摘要

This article presents a novel synthesis-based design procedure for pseudoelliptic filters using high-Q double-layer suspended stripline (DSSL) resonators. The DSSL resonator consists of an air-filled cavity and a suspended thin substrate with metallic top and bottom strips connected using metallic via hole. The resonator achieves a much higher unloaded quality factor than the single-layer SSL resonator. Resonant characteristics and coupling properties of the innovative DSSL resonator are analyzed in detail. In addition, a systematic design procedure of the pseudoelliptic DSSL filter is presented using two examples of sixth-order DSSL filters with two TZs at upper or lower stopband. The procedure is completed by establishing a relationship between the coupling coefficients and the physical structure dimensions based on an efficient full-wave simulation. The established relationship allows accurately obtaining the physical dimensions of the filter from the electrical parameters calculated by the synthesis method. Furthermore, for demonstration of the proposed design procedure, two filter prototypes are synthesized, designed, fabricated, and measured. The synthesized, simulated, and measured results show an excellent agreement.
机译：本文介绍了一种使用高Q双层悬浮带状线（DSSL）谐振器的伪椭圆滤波器的基于合成的新颖设计过程。 DSSL谐振器由一个充气腔和一个悬浮的薄基板组成，该基板具有通过金属通孔连接的金属顶部和底部条带。与单层SSL谐振器相比，该谐振器实现了更高的空载质量因数。详细分析了创新型DSSL谐振器的谐振特性和耦合特性。此外，使用两个在较高或较低阻带处具有TZ的六阶DSSL滤波器的示例，介绍了伪椭圆DSSL滤波器的系统设计过程。通过基于有效的全波模拟在耦合系数和物理结构尺寸之间建立关系来完成该过程。建立的关系允许从通过合成方法计算出的电参数准确地获得滤波器的物理尺寸。此外，为演示所提出的设计程序，对两个滤波器原型进行了合成，设计，制造和测量。综合，模拟和测量结果显示出极好的一致性。

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