2004
DOI: 10.1002/mop.20412
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A dual‐mode bandpass filter with a wide stopband

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Cited by 12 publications
(7 citation statements)
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“…As the mean periphery of the ring resonator is typically one‐guided wavelength, several resonant modes are appeared based on an integral multiple guided wavelength. Moreover, the ring resonator with different variations of the split [6, 7], notch, perturbation [8], and stepped impedance will cause the position variation of the resonant modes. Therefore, the ring resonators usually have unwanted spurious response if the higher order resonant modes are not controlled well.…”
Section: Introductionmentioning
confidence: 99%
“…As the mean periphery of the ring resonator is typically one‐guided wavelength, several resonant modes are appeared based on an integral multiple guided wavelength. Moreover, the ring resonator with different variations of the split [6, 7], notch, perturbation [8], and stepped impedance will cause the position variation of the resonant modes. Therefore, the ring resonators usually have unwanted spurious response if the higher order resonant modes are not controlled well.…”
Section: Introductionmentioning
confidence: 99%
“…The CSRRs are etched on the ground plane or the conductor line of planar transmission structure, such as microstrip or coplanar waveguide, and provide a negative effective permittivity to the dielectric media [1][2][3]. The electromagnetic (EM) behaviors of the CSRRs are similar to those of the electromagnetic bandgap (EBG) structure and/or the defected ground structure (DGS) [4][5][6][7]. However, it is difficult to design the dimension and finding the equivalent circuits of EBG and DGS.…”
Section: Introductionmentioning
confidence: 99%
“…There are two important factors such as cell distance and cell number have been discussed in this work. Although many literatures have been reported [1][2][3][4][5][6][7][8][9][10][11][12], it still requires different viewpoint on the current distribution of CSRR. The interaction between the external ring and internal ring of the single CSRR and periodical CSRRs is carefully demonstrated by simulated current distribution.…”
Section: Introductionmentioning
confidence: 99%
“…While, the requirement of the high performance filter in the sensitive receiver needs a wider upper stop-band, including suppression of 2f 0 and 3 f 0 to reduce the interference from out of-band signals. Although some methods [4 -7] were provided to deal with the problem of spurious responses, they also cause some disadvantages, such as large circuit size [5], insufficient stopband range [4,6,7] and difficult package [6,7]. In addition, there are few design freedoms provided to well suppress spurious responses.…”
Section: Introductionmentioning
confidence: 99%