Wide Bandpass and Narrow Bandstop Microstrip Filters Based on Hilbert Fractal Geometry: Design and Simulation Results

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

doi:10.1371/journal.pone.0115412

Cited by 16 publications

(13 citation statements)

References 15 publications

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“…There are possibly better approximations for ε e , however the additional efforts to obtain more exact ε e are still not worth it [19]. From these equations, ε e = 5.9 and λ g 0 = 22.294 mm have been calculated at f = 5.8 GHz.…”

Section: Filter Design and Resultsmentioning

confidence: 99%

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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Section: Filter Design and Resultsmentioning

confidence: 99%

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

Mezaal

Ali

2016

PLoS ONE

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“…Microstrip fractal filters, subsequently, had been studied widely in the literature using various fractal geometries such as Hilbert, Minkowski, Koch, Peano and Moore curves. These geometries are productively used in the design of compact single band and dual/ multi band microstrip filters for various communication applications [9][10][11][12][13][14][15][16][17].…”

Section: Introductionmentioning

confidence: 99%

New Compact Microstrip Filters Based on Quasi Fractal Resonator

Mezaal¹,

Saleh²,

Al‐Saedi³

2018

AEM

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This paper presents new microstrip devices as single band bandpass and multi band bandstop filters. The proposed filters use slotted patch microstrip resonator based on quasi fractal geometry, simulated by AWR12 software package. Both filters have quasi elliptic frequency response, designed at centre frequency of 2.437 GHz for bandpass filter and at band frequencies of 2.434, 4.032, 4.976 and 5.638 GHz GHz respectively, for multi bandstop filter. All filters are employed using RT/Duroid 6010.8 LM substrate of dielectric constant and 1.27 mm dielectric thickness. Simulation results show that the designed quasi fractal bandpass filter has very narrow fractional bandwidth of 0.38 % which is very rare in microstrip filter design. On the other hand, the projected bandstop filter offers multi narrow rejection bands that is useful in broadband wireless schemes influencing from fixed interferences. Both filters present satisfactory S11 and S21 responses besides smallness properties that stand for interesting features of the newest wireless applications. The simulated and measured frequency responses for both designed filters are in good agreement.

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“…Because of the possibility of obtaining a miniaturized size, so many researchers have adopted the open loop resonators in microstrip filter design [2][3][4][5][6][7][8][9]. Open loop resonator can be found in different configurations fractal line open loop resonator due to the remarkable features of the fractal geometry like self-similarity and space filling [10][11][12][13]. Miniaturization of open loop resonator can be realized by loading with different passive elements [14][15][16][17][18].…”

Section: Introductionmentioning

confidence: 99%

A Compact Dual-Band BPF Based on Open Loop Resonator for Satellite Communication Applications

Salim¹,

Alkhafaji²,

Alqaisy³

2018

ETJ

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In this paper, a new filter is constructed by inserting two slots in the form of rectangular open loop resonator with folded ends. The insertion of these slots has successfully led to the compact size and the dual bandwidth behavior. The overall filter dimensions are 16×12 mm 2 , which correspond to 0.61λg × 0.4λg using a substrate with Rogers Ro 4003 with a relative permittivity of 3.38 and thickness of 1.0 mm. The resulting structure exhibits a dual-band behavior. The first passband has a center frequency of 6.2 GHz with FBW of 16.833% and input reflection coefficient better than -30 dB and insertion loss is approximately equal to -0.3 dB. In the second passband, the center frequency is 9.6 GHz, and the FBW is 12.57% with an input reflection coefficient better than -25 dB and insertion loss is approximately equal to -0.5 dB. The transmission zero is located between the dual passbands at 7.8 GHz with over -28.66 dB of the stopband. The simulation and performance evaluation of the proposed filter have been carried out using Microwave Studio Suite of Computer Simulation Technology (CST). As a result, this makes the proposed filter candidate for operating in satellite applications.

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Wide Bandpass and Narrow Bandstop Microstrip Filters Based on Hilbert Fractal Geometry: Design and Simulation Results

Cited by 16 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

New Compact Microstrip Filters Based on Quasi Fractal Resonator

A Compact Dual-Band BPF Based on Open Loop Resonator for Satellite Communication Applications

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