Cross‐coupled Hilbert spiral resonator for bandpass filter design

Liu, Ji‐Chyun; Lu, Pei-Hsuan; Chien, Chi-Hsun; Chang, Jun-Mao; Chen, Jong-Yih; Lin, Horng-Jyh

doi:10.1002/mop.22630

Cited by 8 publications

(5 citation statements)

References 15 publications

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“…From the initial curve of branch (a) of Figure 1, branches (b), (c), (d), and (e) can be formed relatively. As the iteration order of the curve increases, the Hilbert fractal curve may space-fill the patch [11,15].…”

Section: Hilbert Fractal Geometry and Step Impedance Resonatormentioning

confidence: 99%

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

Mezaal

Eyyuboğlu

Ali

2014

IETE Journal of Research

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The proposed microstrip bandpass filters in this paper have compact sizes and narrow band responses which are the requirements of modern wireless communication circuits. These filters are constructed from dual-edge coupled resonators; each resonator is based on applying step impedance resonator generator on first and second iteration of Hilbert fractal resonators on each segment of each iteration level. They have been designed for the industrial, scientific, and medical band (ISM) band applications at a centre frequency of 2.4 GHz using a substrate with a dielectric coefficient of 9.6 and thickness of 0.508 mm. The performance of bandpass filters has been analysed using a method of moments (MoM) based on software package, Microwave Office 2009, from Advanced Wave Research Inc., which is widely adopted in microwave research and industry. Simulation responses show that these filters possess good frequency response characteristics with second harmonics suppression. Moreover, these filters showed noticeable miniaturization which is an important feature for many communication applications. The simulated and measured results are in good agreement.

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Section: Hilbert Fractal Geometry and Step Impedance Resonatormentioning

confidence: 99%

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

Mezaal

Eyyuboğlu

Ali

2014

IETE Journal of Research

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“…Since then, research work in this field has shown a dramatic increase. In this respect, various fractal geometries have been applied to design compact single-band and dual-band microstrip BPFs (Ahmed, 2012;Alqaisy, Ali, Chakrabarty, & Hock, 2013;Barra, 2004;Chen & Lin, 2011;Chen, Weng, Jiao, & Zhang, 2007;Crnojevic-Bengin, Radonic, & Jokanovic, 2006;Feng, Ming, & Hui, 2012;Ghatak, Pal, & Sarkar, 2013;Li et al, 2012;Liu, Chien, Lu, Chen, & Lin, 2007;Liu et al, 2012;Mezaal, 2009;Mezaal, Eyyuboglu, & Ali, 2013a, 2013b.…”

Section: Introductionmentioning

confidence: 98%

“…Hilbert fractal geometry has been harnessed as a defected ground structure in the design of a microstrip lowpass filter for L-band communication application . Typical and simplified cross-coupled spiral resonators with Hilbert configuration were introduced by Liu et al (2007) for a huge coupling factor with comparison between each other. Narrow band dual resonator microstrip BPFs based on Hilbert fractal curves have been proposed for wireless application as in Mezaal (2009) within ISM band at fundamental frequency of 2.4 GHz.…”

Section: Introductionmentioning

confidence: 99%

Miniaturised microstrip bandpass filters based on Moore fractal geometry

Mezaal

Ali

Eyyuboğlu

2014

International Journal of Electronics

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This paper presents new microstrip bandpass filter design topologies that consist of dual edge-coupled resonators constructed in the form of Moore fractal geometries of second and third iteration levels. The space-filling property for proposed fractal filters has found to produce reduced size shapes in accordance with sequential iteration levels. These filters have been prepared for ISM band applications at a centre frequency of 2.4 GHz using a substrate with a dielectric coefficient of 10.8, dielectric thickness of 1.27 mm and metallisation thickness of 35 µm. The output responses of each fractal bandpass filter have been determined by a full-wave-based electromagnetic simulator Sonnet software package. Simulated and experimental results are approximately compatible with each other. These responses clarify that these fractal filters have good transmission and return loss characteristics with blocked higher harmonics in out-of-band regions.

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“…Based on the improved model, a compact L-band microstrip low-pass filter with periodic DGS was designed and studied. Typical and simplified cross-coupled spiral resonators with Hilbert configurations have been stated in [10] for a large coupling coefficient with comparison between each other. All of designs introduced in [10] have low insertion loss, high out-of-band rejection level and wider band frequency responses.…”

Section: Introductionmentioning

confidence: 99%

“…Typical and simplified cross-coupled spiral resonators with Hilbert configurations have been stated in [10] for a large coupling coefficient with comparison between each other. All of designs introduced in [10] have low insertion loss, high out-of-band rejection level and wider band frequency responses. Moreover, surface current distributions simulated by IE3D EM software package have been used to analyze the coupling regions in spiral and Hilbert configurations.…”

Section: Introductionmentioning

confidence: 99%

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

2014

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This paper presents new Wide Bandpass Filter (WBPF) and Narrow Bandstop Filter (NBSF) incorporating two microstrip resonators, each resonator is based on 2nd iteration of Hilbert fractal geometry. The type of filter as pass or reject band has been adjusted by coupling gap parameter (d) between Hilbert resonators using a substrate with a dielectric constant of 10.8 and a thickness of 1.27 mm. Numerical simulation results as well as a parametric study of d parameter on filter type and frequency responses are presented and studied. WBPF has designed at resonant frequencies of 2 and 2.2 GHz with a bandwidth of 0.52 GHz, −28 dB return loss and −0.125 dB insertion loss while NBSF has designed for electrical specifications of 2.37 GHz center frequency, 20 MHz rejection bandwidth, −0.1873 dB return loss and 13.746 dB insertion loss. The proposed technique offers a new alternative to construct low-cost high-performance filter devices, suitable for a wide range of wireless communication systems.

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Cross‐coupled Hilbert spiral resonator for bandpass filter design

Cited by 8 publications

References 15 publications

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

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

Miniaturised microstrip bandpass filters based on Moore fractal geometry

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

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