Super-Compact Bandpass Filter based on a Novel Resonator Composed of Two Strongly-Coupled λ/4 Sub-Resonators
This paper proposes and develops a novel resonator, which is composed of two strongly-coupled λ/4 subresonators via an interdigital capacitor. Firstly, two stronglycoupled Stepped Impedance Resonators (SIRs) are considered as a single resonator and its resonant properties are investigated theoretically. Secondly, to realize the strong mutual coupling, the low impedance end of SIR is split to form an interdigital capacitor. The resultant resonator shows a competitive merit in size miniaturization. Meanwhile, this structure is similar with the Zeroth Order Resonator (ZOR) in composite right/left handed (CRLH) transmission line (TL) metamaterial, while our perspective demonstrates a distinctive advantage on the understanding of resonant modes. Furthermore, a super-compact bandpass filter based on two parallel-connected resonators is designed, which not only shows the sharp rejection skirts at both low and high cut-off frequencies of the desired passband, but also possesses good spurious suppression.
stepped impedance resonator super-compact filter zeroth order resonator
Songbai Zhang Lei Zhu Rui Li
Electrical and Electronic Engineering Nanyang Technological University Singapore Institute of Microelectronics A*STAR (Agency for Science, Technology and Research) Singapore
国际会议
2012 5th Global Symposium on Millimeter-Waves(2012年第五届全球毫米波会议 GSMM 2012)
哈尔滨
英文
270-273
2012-05-27（万方平台首次上网日期，不代表论文的发表时间）