In this paper, two compact filters with high selectivity and wideband harmonic suppression are proposed, which use printed circuit board packaging technique. The filters are designed based on the complementary split‐ring resonators (CSRRs) and short‐circuit centered stepped impedance resonator (SCSIR). High selectivity and wideband harmonic suppression are achieved by controlling the transmission zeros. The center frequency and transmission zeros near the passband can be controlled independently by adjusting the parameters of the CSRR and the SCSIR, respectively. Two bandpass filters are designed with the typical coupling matrix theory. The measured insertion loss is within 2 dB for the two bandpass filters. The transition band from the cut‐off frequency to 40 dB attenuation is only 0.12 GHz.

中文翻译：

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采用印刷电路板封装技术的高性能带通滤波器

本文提出了两种具有高选择性和宽带谐波抑制能力的紧凑型滤波器，它们采用印刷电路板封装技术。滤波器是基于互补的开环谐振器（CSRR）和以短路为中心的步进式阻抗谐振器（SCSIR）设计的。通过控制传输零点，可以实现高选择性和宽带谐波抑制。通过分别调整CSRR和SCSIR的参数，可以独立控制通带附近的中心频率和传输零点。使用典型的耦合矩阵理论设计了两个带通滤波器。对于两个带通滤波器，测得的插入损耗在2 dB以内。从截止频率到40 dB衰减的过渡带仅为0.12 GHz。