Novel dual‐mode square patch bandpass filter using slot‐type SRR perturbation for mode splitting

Shu-hong, FU; Tong, Chuangming; Li, Ximin; Zhou, Ming

doi:10.1002/mop.26148

Cited by 4 publications

(3 citation statements)

References 12 publications

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“…Specifically, due to the resonance nature of most metamaterial unit cells, one can achieve compact microwave components, e.g., the bandpass/notch filters [14][15][16][17] and antennas. 18,19 However, most of the reported metamaterials inspired bandpass filters as mentioned above still suffer from large inclusion sizes and complex configurations, which restrict the practical RF/microwave circuit integration and miniaturization applications.…”

Section: Introductionmentioning

confidence: 99%

Systematical analysis for the mixed couplings of two adjacent modified split ring resonators and the application to compact microstrip bandpass filters

Huang

2014

AIP Advances

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In this paper we synthesize a new kind of modified split ring resonator (SRR) and characterize its mixed couplings between two adjacent such SRRs with all the possible arrangements on one side of a conventional dielectric substrate. Based on the analysis of the mixed couplings, the compact microstrip bandpass filters composed of the proposed modified SRRs are systematically analyzed. We found that two designs out of all the cases have quite well bandpass filter characteristics, e.g., low insert loss within the wide passband, sharp reductions and transmission zeros out of the passband, and harmonic suppression characteristics for a wide frequency range. Both experimental demonstrations and numerical simulations are performed to verify the designed filters and the results agree well with each other. Such kind of filter design can be flexibly integrated in the miniaturized radio frequency/microwave circuits.

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Section: Introductionmentioning

confidence: 99%

Systematical analysis for the mixed couplings of two adjacent modified split ring resonators and the application to compact microstrip bandpass filters

Huang

2014

AIP Advances

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“…[9], a miniaturized dual‐mode microstrip band‐pass filter with the right crossed slots is presented. A novel square patch resonator band‐pass filter with slot‐type SRR perturbation and two types of band‐pass filters using fractal‐shaped square resonators are studied [10, 11]. A regular hexagon dual‐mode patch resonator is also used to design a band‐pass filter [12].…”

Section: Introductionmentioning

confidence: 99%

Novel dual‐mode patch band‐pass filters with slot structures

Chen

et al. 2012

Micro & Optical Tech Letters

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Two novel microstrip band‐pass filters using dual‐mode patch resonators with slot structures are proposed and optimized in this article. By using etched slot defected structures in the circle patch resonator and the regular hexagon patch resonator, the filters have remarkable advantages, such as compact size, high selectivity, and simple structure. The proposed band‐pass filters are simulated, fabricated, and measured. Each of the band‐pass filters has two transmission zeros. The measured results prove to be largely consistent with the simulated results. © 2012 Wiley Periodicals, Inc. Microwave Opt Technol Lett 54:2130–2133, 2012; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.27002

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“…For the first time, the split-ring resonator (SRR) proposed by Pendry et al [6], has attracted great interest for the design of negative permeability and metalmaterials [7]. Lately, SRR has been widely used to develop a variety of microwave devices [8][9][10], because of its unique exhibiting characteristics. From a duality argument, complementary splitring resonators (CSRRs) were introduced by Falcone et al in 2004 as new metamaterial resonators and have been proven to exhibit negative permittivity and potential application.…”

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confidence: 99%

Novel dual‐mode circular patch bandpass filter using CSRR slot‐type perturbation

Shi

Liu

et al. 2013

Micro & Optical Tech Letters

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The measured relative phase shifts are shown in Figures 4(a) and 4(b) for both the single-and double-segment phase shifters, respectively, from 0.7 to 1.4 GHz. We obtain 65.8 degree average relative phase shift with a 2.9 degree maximum phase error over the measured octave frequency band from the single-segment circuit as shown in Figure 4(a). The control voltages for varactors were separately optimized in order to obtain reasonably good performance in terms of the phase shift, return loss, and insertion loss. Further study has to be done to implement introduced phase shifters with a single control voltage for engineering applications. For the double-segment phase shifter, the average relative phase shift becomes 128 degrees (about twice as much as the single-segment shifter's). Phase shift at the frequencies lower than 0.7 GHz and higher than 1.4 GHz rise faster than at the center frequency. This is due to rapid phase changes of the HPF in the lower frequencies and of the LPF in the higher frequency range, as shown in Figures 1(a) and 1(b). This is the main factor that limits the frequency bandwidth. However, the problem can be mitigated to widen the bandwidth by aiming for less phase change from the single-segment and increasing the number of segments. CONCLUSIONA simple method to design a broadband phase shifter is introduced. Two phase shifters are demonstrated with one and two of the alternately cascaded LPF-HPF-LPF structures, which consist of inductors and varactors. The amount of relative phase shift across 0.7-1.4 GHz range is 65.8 and 128 degrees for the singleand double-segment circuits, respectively. The total phase shift grows in proportion to the number of segmental phase shifters, resulting in an architecture that can achieve up to 360 degrees.ABSTRACT: Two small antipodal Vivaldi antennas for ultrawide band early breast cancer detection are proposed. The antennas are designed to operate in the spectrum from 1 to 10 GHz, according to the requirements of wave penetration in the breast and imaging resolution. Simulated and measured reflection parameters of the proposed antennas are evaluated. Numerical results also show the proposed antennas have good near-field radiation performance. Finally, an antenna array consisting of eight antipodal Vivaldi antennas, appropriate to collect the tumor scattering signal in the breast is presented.

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Novel dual‐mode square patch bandpass filter using slot‐type SRR perturbation for mode splitting

Cited by 4 publications

References 12 publications

Systematical analysis for the mixed couplings of two adjacent modified split ring resonators and the application to compact microstrip bandpass filters

Systematical analysis for the mixed couplings of two adjacent modified split ring resonators and the application to compact microstrip bandpass filters

Novel dual‐mode patch band‐pass filters with slot structures

Novel dual‐mode circular patch bandpass filter using CSRR slot‐type perturbation

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