Optimisation of chirped and tapered microstrip Koch fractal electromagnetic bandgap structures for improved low‐pass filter design

Ruiz, J.D.; Martínez-Viviente, Félix L.; Hinojosa, Juan

doi:10.1049/iet-map.2014.0453

Cited by 15 publications

(7 citation statements)

References 22 publications

(31 reference statements)

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“…The microstrip filters are highly researched [8] [9] [10] and popular in design of filter at frequencies beyond of 500 MHz because of the difficult to realize filters with lumped elements that have predetermined commercial values and physical dimensions comparable with the wavelength of frequency operation of filter resulting in degrading of performance.…”

Section: Design Of Microstrip Low-pass Filtermentioning

confidence: 99%

Design of Stepped Impedance Microstrip LowPass Filter for Coexistence of TV Broadcasting and LTE Mobile System Close to 700 MHz

Chuma¹,

Iano²,

Cardoso³

et al. 2018

SET IJBE

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Section: Design Of Microstrip Low-pass Filtermentioning

confidence: 99%

Design of Stepped Impedance Microstrip LowPass Filter for Coexistence of TV Broadcasting and LTE Mobile System Close to 700 MHz

Chuma¹,

Iano²,

Cardoso³

et al. 2018

SET IJBE

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“…To finish this section, the results obtained in our example will be compared with the state of the art in filters based on EBG structures. A very interesting work has been recently published [77] where a 1D-EBG filter with rejection level better than 80 dB was proposed, although it lacks in return loss level in the passband (only 10 dB, not enough for many applications) and straightness in the design procedure. A comparison of 12 EBG devices covering many authors, years, and types of EBG structures is also included in that paper.…”

Section: Design Example: Proof Of Conceptmentioning

confidence: 99%

Synthesis of One Dimensional Electromagnetic Bandgap Structures with Fully Controlled Parameters

Arnedo

Chudzik

Percaz

et al. 2017

IEEE Trans. Microwave Theory Techn.

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In this paper, we propose a novel synthesis strategy for the design of One Dimensional Electromagnetic Bandgap (1D-EBG) structures where all the performance parameters of these devices can be fully controlled, i.e., the central frequency of the forbidden band, its attenuation level and bandwidth, and the ripple level at the passbands. The novel synthesis strategy employs a new inverse scattering technique to accurately synthesize the 1D-EBG structure, targeting a properly interpolated version of a classical periodic filter fulfilling the required frequency specifications. The new inverse scattering technique follows a continuous layer peeling approach and relies on the coupled-mode theory to precisely model the microwave structures. Telecommunication and radar systems, as well as material characterization devices, will be profited by this proposal with which enhanced filters, sensors, power dividers, couplers, mixers, oscillators and amplifiers can be designed in many different technologies. As a proof of concept, a 1D-EBG structure in microstrip technology with a single forbidden band (free of spurious stopband replicas), with attenuation level of 30 dB, fractional bandwidth larger than 100%, and return loss level at the passbands of 20 dB, has been designed and fabricated. The measurements obtained are in very good agreement with the simulations and target specifications, being free of spurious replicas up to the 15th harmonic, showing the robustness and very good performance of the novel design strategy proposed.

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“…Fractal geometries have been introduced in the development of various devices and components, such as frequency selective surfaces (FSSs) [29], antennas [30], and bandpass filters [31]. Meanwhile, many different fractal geometries such as Cantor- [32], T- [33], Minkowski-island- [34], Koch- [35], Moore curve- [36,37], Sierpinski carpet-shaped geometry [38] have also been demonstrated to further improve the performances of such devices and components. Very recently, Lu et al have proposed a compact dual-mode microstrip bandpass filter based on Greek-cross fractal resonator (GCFR) to provide an alternative approach for the miniaturization design [39].…”

Section: Introductionmentioning

confidence: 99%

High-performance spoof surface plasmon polariton waveguides and splitters based on Greek-cross fractal units

Ye¹,

Chen²,

Zhou³

et al. 2020

J. Phys. D: Appl. Phys.

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In this paper, we introduce the fractal geometry into the spoof surface plasmon polariton (SSPP) waveguide and splitter design. We propose a novel SSPP waveguide consisting of periodic corrugated Greek-cross fractal units (GCFUs) connected to a microstrip line. The generation process of periodic corrugated GCFUs is described and the dispersion characteristics are studied. We find we can engineer the property of the waveguide at will by tuning the parameters of the GCFU. To validate the proposed design, a wideband lowpass filter based on double-sided DCFUs with ultra-sharp roll-offs is fabricated and tested. Based on this waveguide concept, we design a wideband Y-splitter including an SSPP waveguide with double-sided GCFUs and two SSPP waveguide branches with single-sided GCFUs. To improve isolations and reduce the reflections between output ports of the Y-splitter, a 100 Ω resistor is loaded in the middle of two symmetrical branches to construct Wilkinson splitter to equally and efficiently split the energy of the SSPPs into two parts. The simulated and measured results show that the SSPP splitter possesses excellent performance in a passband of 1.5–4.0 GHz with low insertion loss (S21, S31 > −4 dB), high reflection loss (S11, S22, S33 < −10 dB), and high isolation (S32 < −10 dB). This work may open up a new door for the development of various plasmonic integrated functional devices.

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Optimisation of chirped and tapered microstrip Koch fractal electromagnetic bandgap structures for improved low‐pass filter design

Cited by 15 publications

References 22 publications

Design of Stepped Impedance Microstrip LowPass Filter for Coexistence of TV Broadcasting and LTE Mobile System Close to 700 MHz

Design of Stepped Impedance Microstrip LowPass Filter for Coexistence of TV Broadcasting and LTE Mobile System Close to 700 MHz

Synthesis of One Dimensional Electromagnetic Bandgap Structures with Fully Controlled Parameters

High-performance spoof surface plasmon polariton waveguides and splitters based on Greek-cross fractal units

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