Size Reduction and Bandwidth Enhancement of a Waveguide Bandpass Filter Using Fractal-Shaped Irises

Oloumi, Daniel; Kordzadeh, Atefeh; Neyestanak, A. A. Lotfi

doi:10.1109/lawp.2009.2035648

Cited by 22 publications

(14 citation statements)

References 13 publications

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“…A photograph of the fabricated filter is shown in Figure 3. A comparison of different irises with conventional rectangular shape iris [12] is presented in Table 2. As it can be seen, by using the Sierpinski fractal iris, the bandpass of the proposed filter can be increased while the bandpass ripple is decreased into 0.5 dB.…”

Section: Fabrication and Measurementmentioning

confidence: 99%

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Improved Bandwidth Waveguide Bandpass Filter Using Sierpinski Fractal Shaped Irises

Lotfi-Neyestanak

Seyed-Momeni²,

Haraty³

2013

PIER Letters

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Abstract-This paper presents a novel waveguide band pass filter using Sierpinski fractal-shaped irises. The bandwidth of the proposed filter is more than 5.5 times in comparison to similar waveguide filter with rectangular shape iris. The offered filter is designed and simulated using Ansoft HFSS and then fabricated. The results show less than 0.5 dB insertion loss and return loss better than 13 dB in operation frequency band for the proposed filter.

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Section: Fabrication and Measurementmentioning

confidence: 99%

“…In [12], a waveguide band pass filter with Koch fractal-shaped irises is presented. By applying first iteration Koch fractal-shaped irises, the bandwidth is increased and the overall size is reduced in comparison to a waveguide filter with rectangular-shaped irises.…”

Section: Introductionmentioning

confidence: 99%

Improved Bandwidth Waveguide Bandpass Filter Using Sierpinski Fractal Shaped Irises

Lotfi-Neyestanak

Seyed-Momeni²,

Haraty³

2013

PIER Letters

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“…Therefore, several types of filter miniaturization techniques have been introduced. These include the use of evanescent mode [10][11][12], circular posts [13], dielectric filling [14,15], ridge waveguide [16], fractal shaped irises [17] and ridge resonator [18].…”

Section: Introductionmentioning

confidence: 99%

A Compact, Wideband Waveguide Bandpass Filter Using Complementary Loaded Split Ring Resonators

Bage¹,

Das²

2016

PIER C

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This paper presents a Complementary Loaded Split Ring Resonator (CLSRR) based compact, wideband, waveguide bandpass filter. Three identical CLSRRs were fabricated and placed on the transverse plane of a standard WR-90 waveguide at a quarter wavelength distance to form the filter. The proposed filter was initially simulated using Ansoft HFSS (version 14) and then fabricated and measured. The measured result shows a fractional bandwidth of 18.80% at 10.05 GHz. Total length of the filter is only 20.33 mm which is compact enough. Detailed design procedure has been presented along with the equivalent circuit of the filter. A table has been provided to compare the performance of the proposed filter with those already available in the literatures. The table shows that the proposed filter is compact and has higher bandwidth, lower insertion loss and higher return loss.

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“…Because of the space‐filling and self‐similarity property of the fractal geometry, the fractal‐shaped structures are widely used in filter designs to improve performances . For the filter in , the resonant frequency is cut down 13.3% and expected transmission zero (TZ) is obtained by using Sierpinski fractal defected structure in the center of QSIWR.…”

Section: Introductionmentioning

confidence: 99%

“…For the filter in , the resonant frequency is cut down 13.3% and expected transmission zero (TZ) is obtained by using Sierpinski fractal defected structure in the center of QSIWR. In , the microstrip filters’ sizes and bandwidth are reduced and widened respectively, by using Koch fractal shapes.…”

Section: Introductionmentioning

confidence: 99%

Quasi quarter SIW‐mode resonator and its application to sierpinski fractal filter design

Zhang

Wang

et al. 2016

Micro & Optical Tech Letters

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In this letter, a new kind of quasi quarter SIW resonator (QQSIWR) using Sierpinski fractal defected structure is presented first. Comparing with SIW resonator, this novel resonator has lower resonant frequency (f 0 ) and acceptable unloaded quality (Q u ) value, while maintaining almost unchanged electromagnetic fields distributions. The frequency characteristics and Q u of this resonator is investigated under different fractal sizes. To validate the properties of QQSIWR, a miniature cross-coupled bandpass filter (BPF) with a size reduction over 88% is proposed and optimized using Sierpinski fractal structure and cross coupling technology. It can produce asymmetrical frequency response by generating a transmission zero (TZ) on the high side of passband. A prototype of the filter is fabricated and measured, and the measured results are in good agreement well with the simulated ones.

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Size Reduction and Bandwidth Enhancement of a Waveguide Bandpass Filter Using Fractal-Shaped Irises

Cited by 22 publications

References 13 publications

Improved Bandwidth Waveguide Bandpass Filter Using Sierpinski Fractal Shaped Irises

Improved Bandwidth Waveguide Bandpass Filter Using Sierpinski Fractal Shaped Irises

A Compact, Wideband Waveguide Bandpass Filter Using Complementary Loaded Split Ring Resonators

Quasi quarter SIW‐mode resonator and its application to sierpinski fractal filter design

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