New Microstrip Bandpass Filter Designs Based on Stepped Impedance Hilbert Fractal Resonators

Mezaal, Yaqeen S.; Eyyuboğlu, Halil T.; Ali, Jawad K.

doi:10.1080/03772063.2014.922018

Cited by 18 publications

(11 citation statements)

References 15 publications

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“…On the other hand, the fundamental frequency can be controlled by scaling the electrical lengths for x and y sections of the adopted resonator [18]. …”

Section: Step Impedance Resonatormentioning

confidence: 99%

“…SIR is a non-standardized transmission line, which can be adopted in the filter design either for miniaturization objectives, or to reallocate the spurious pass-band to the upper frequency, or to isolate the harmonic frequencies [18]. In this study, SIR approach has been used to isolate 2 nd harmonic frequency in output frequency response of the filter.…”

Section: Step Impedance Resonatormentioning

confidence: 99%

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Investigation of Dual-Mode Microstrip Bandpass Filter Based on SIR Technique

Mezaal

Ali

2016

PLoS ONE

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In this paper, a new bandpass filter design has been presented using simple topology of stepped impedance square loop resonator. The proposed bandpass filter has been simulated and fabricated using a substrate with an insulation constant of 10.8, thickness of 1.27mm and loss tangent of 0.0023 at center frequency of 5.8 GHz. The simulation results have been evaluated using Sonnet simulator that is extensively adopted in microwave analysis and implementation. The output frequency results demonstrated that the proposed filter has high-quality frequency responses in addition to isolated second harmonic frequency. Besides, this filter has very small surface area and perceptible narrow band response features that represent the conditions of recent wireless communication systems. Various filter specifications have been compared with different magnitudes of perturbation element dimension. Furthermore, phase scattering response and current intensity distribution of the proposed filter have been discussed. The simulated and experimental results are well-matched. Lastly, the features of the proposed filter have been compared with other designed microstrip filters in the literature.

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“…On the other hand, the fundamental frequency can be controlled by scaling the electrical lengths for x and y sections of the adopted resonator [18]. …”

Section: Step Impedance Resonatormentioning

confidence: 99%

Section: Step Impedance Resonatormentioning

confidence: 99%

Investigation of Dual-Mode Microstrip Bandpass Filter Based on SIR Technique

Mezaal

Ali

2016

PLoS ONE

Self Cite

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“…In this perspective, the classical Euclidean shapes, such as the square, have been shaped in the form of the Sierpinski carpet to design a dual-mode BPF [10,11]. Numerous traditional fractal structures attracted the microwave passive circuit designers to produce of miniaturized microstrip BPFs as well [12,13]. Microstrip structures with Peano fractal-shaped resonators and its modification were employed in the conventional resonators to fabricate efficient miniaturized single-and dual-mode BPFs with single-band performance and also dual-mode implementation [14][15][16][17].…”

Section: Introductionmentioning

confidence: 99%

Fractal Geometry: An Attractive Choice for Miniaturized Planar Microwave Filter Design

Ziboon¹,

Ali²

2019

Fractal Analysis

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Various fractal geometries are characterized by the self-similarity and spacefilling properties. The space-filling feature has been successfully applied to design multiband antenna structures for a wide variety of multifunction wireless systems. On another hand, the second feature has proved its validity to produce miniaturized antennas and passive microwave circuits including the band-pass filters (BPF). This chapter demonstrates the design of miniaturized microstrip BPFs that are derived from fractal-based DGS resonators. Many microstrip BPFs based on the Minkowski fractal DGS resonators will be presented together with those based on Moore and Peano fractal geometries. Simulation results, of all of the presented BPFs, show that an extra-size reduction can be obtained as the iteration level becomes higher. Measured and simulated results agree well with each other. A comparison has been conducted with other filters based on Peano and Hilbert fractal geometries. The results reveal that the proposed BPF offers acceptable performance and a significant decrease of higher harmonics.

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“…. Another method, used in several designs, quarter wavelength stepped impedance resonators (SIRs) and asymmetric coupled lines, have been introduced.…”

Section: Introductionmentioning

confidence: 99%

Adjustable compact dual‐band microstrip bandpass filter using T‐shaped resonators

Khani

Makki

Mousavi

et al. 2017

Micro & Optical Tech Letters

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In this letter, a compact dual‐band bandpass filter (BPF) is designed, analyzed, and fabricated. A loop resonator loaded by two modified T‐shaped resonators, double T‐shaped resonators, and open bended stubs are applied to form the proposed configuration. The coupling spaces between the loop resonators and open bended stubs result in two passbands with the center frequencies of 2.4 GHz and 5.7 GHz. The LC equivalent circuit of the main resonator is introduced to present an analytical description. Without needing to increase the circuit size, the upper passband can be adjusted between 5.72 GHz and 6.93 GHz. The measured data indicates less than 0.64 dB and 0.76 dB insertion losses in the first and second passbands, respectively. Adjustable second center frequency, compact size, low insertion loss, good suppression level, and a symmetrical structure are the marked features of the proposed BPF. Finally, a good agreement between the simulated and measured results is observed.

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New Microstrip Bandpass Filter Designs Based on Stepped Impedance Hilbert Fractal Resonators

Cited by 18 publications

References 15 publications

Investigation of Dual-Mode Microstrip Bandpass Filter Based on SIR Technique

Investigation of Dual-Mode Microstrip Bandpass Filter Based on SIR Technique

Fractal Geometry: An Attractive Choice for Miniaturized Planar Microwave Filter Design

Adjustable compact dual‐band microstrip bandpass filter using T‐shaped resonators

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