Miniaturized Dual-Mode Filter Using Fractal Slot and Snaky-Shape Spur-Line

Liu, H; Fu, Tiantian; Yang, Yayun; Li, X

doi:10.1163/156939308786375082

Cited by 6 publications

(10 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Since most mobile devices become smaller and leave limited space for the placement of the filters, it is of importance to miniaturize the required filter size. Recently, much research work on miniaturized microstrip bandpass filter has been performed and various kinds of resonators have be presented [5][6][7][8][9][10][11][12][13][14][15]. Among them, dual-mode resonators are most widely used in the miniaturized filters designs [5][6][7][8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

“…Recently, much research work on miniaturized microstrip bandpass filter has been performed and various kinds of resonators have be presented [5][6][7][8][9][10][11][12][13][14][15]. Among them, dual-mode resonators are most widely used in the miniaturized filters designs [5][6][7][8][9][10][11]. In [5][6][7][8], square loop resonators with different loaded structures such as capacitive open-loop arms [5], distributed capacitors [6], treeshaped patches [7] and slow-wave open loop arms [8] are utilized to obtain size reduction.…”

Section: Introductionmentioning

confidence: 99%

“…In [9], the authors present the perturbed dualmode ring resonators to miniaturize the areas. Slotted patch [10,11] is another choice to reduce the fundamental resonant frequency with the same dimensions. However, some dual-mode filters proposed above occupy still a fairly large circuit area.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Novel Miniaturized Bandpass Filters Using Spiral-Shaped Resonators and Window Feed Structures

Dai¹,

Xia²

2010

PIER

View full text Add to dashboard Cite

Abstract-In this paper, we present a new class of miniaturized microstrip bandpass filters with low-insertion loss, sharp-rejection and narrow-band performance. The proposed filters are composed of two spiral-shaped resonators and rectangle window feed structures. Both back-to-back and interdigital combinations of the resonators are adopted to obtain the miniaturized filter size. Compared to the traditional square loop bandpass filter, the sizes are reduced by 82% and 80%. It is also found that there is a pair of transmission zeros located on each side of the passbands, resulting in high selectivity. To validate the proposed idea, two demonstration filters with back-toback and interdigital spiral-shaped resonators are implemented. The measured results exhibit good agreement with the full-wave simulation results.

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Novel Miniaturized Bandpass Filters Using Spiral-Shaped Resonators and Window Feed Structures

Dai¹,

Xia²

2010

PIER

View full text Add to dashboard Cite

show abstract

“…Since most mobile devices become smaller and leave limited space for the placement of the filters, circuit size reduction becomes the main challenge of the filter design. Recently, much research work about miniaturized microstrip bandpass filter has been performed, and various kinds of methods to reduce the filter size have been developed [5][6][7][8][9][10][11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

“…However, the operation frequencies of these proposed filters cannot be determined directly, and the design procedure is complicated. On the other hand, compact microstrip resonant cell (CMRC) structure [9], steppedimpedance ring [10], slotted patch [11,12], and meander loop resonators [13] are also proposed to design small-sized bandpass filters. In [14], the authors present a novel method to obtain the miniaturized bandpass filters.…”

Section: Introductionmentioning

confidence: 99%

An Investigation of Quarter-Wavelength Square-Spiral Resonator and Its Applications to Miniaturized Bandpass Filters

Dai

Xia

2010

Journal of Electromagnetic Waves and Applications

View full text Add to dashboard Cite

In this paper, we investigate both quarter-wavelength square-spiral resonator and its application to miniaturized bandpass filters. Using the commercial simulation software, we examine the coupling coefficients and external quality factor of the proposed structure. With different combinations of the proposed resonators, four miniaturized bandpass filters are designed. The sizes of the designed filters are reduced by 96%, 96.7%, 96.6% and 94.8%, compared to the traditional square loop bandpass filter. It is also found that the first spurious passband of the filters is increased up to near three times the fundamental resonant frequency, and the rejection level around twice the fundamental resonant frequency is kept below 20 dB. To validate the proposed idea, four experimental filters are designed, simulated and fabricated. Measured results are in good agreement with the theoretical predictions.

show abstract

New Dual Band Dual-Mode Microstrip Patch Bandpass Filter Designs Based on Sierpinski Fractal Geometry

Mezaal

Eyyuboğlu

Ali

2013

2013 Third International Conference on Advanced Computing and Communication Technologies (ACCT)

View full text Add to dashboard Cite

Dual band dual mode chebychev microstrip bandpass filter designs are introduced for first time in this paper. The proposed filter designs are based on the use of dual mode square slotted patch microstrip resonator. These filter structures are fractally generated using Sierpinski fractal curve geometry applied to the conventional square microstrip patch from 1 st to 2 nd iteration levels where the first band designed at fundamental frequencies (5.475 ,5.45 and 5.4) GHz for each iteration while the second band( 8.925,9.15,9.05) GHz for each iteration. These filters have been designed using a substrate with a dielectric constant of 10.8 and thickness of 1.27mm.The performance of filter structures, based on resonators has been evaluated using a full-wave based electromagnetic simulator Sonnet software package. Performance simulation results show that these filter structures are compact in addition to good frequency responses and narrow bands gained .

show abstract

Miniaturized Dual-Mode Filter Using Fractal Slot and Snaky-Shape Spur-Line

Cited by 6 publications

References 10 publications

Novel Miniaturized Bandpass Filters Using Spiral-Shaped Resonators and Window Feed Structures

Novel Miniaturized Bandpass Filters Using Spiral-Shaped Resonators and Window Feed Structures

An Investigation of Quarter-Wavelength Square-Spiral Resonator and Its Applications to Miniaturized Bandpass Filters

New Dual Band Dual-Mode Microstrip Patch Bandpass Filter Designs Based on Sierpinski Fractal Geometry

Contact Info

Product

Resources

About