Novel Design of Dual-Mode Bandpass Filter With Triangular Structure

Zhao, Lei; Chen, Liang; Li, G.; Dai, Xi-Wang

doi:10.1163/156939308784150146

Cited by 9 publications

(4 citation statements)

References 10 publications

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“…The use of planar degenerate dual-mode resonators for bandpass filters applications was firstly proposed by Wolff [5]. A dualmode microstrip filter can be designed using degenerate modes [5][6][7][8][9][10][11][12][13][14][15][16][17][18][19] or non-degenerate modes [20,21]. Degenerate modes based filters have been investigated in various topologies such as square patch [6], circular patch [7], triangular patch [8,9], microstrip loop [10][11][12][13], circular ring [14][15][16], and meander shape [17][18][19].…”

Section: Introductionmentioning

confidence: 99%

A New Small Size Non-degenerate Dual-mode Patch Filter

Sheta

Al-Eshaikh

2011

Journal of Electromagnetic Waves and Applications

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A new small size non-degenerate dual-mode square patch filter is proposed. The proposed filter structure is based on a slotted square patch non-degenerate dual-mode resonator. The filter response is obtained by exciting the degenerate modes and the first higher order mode of the proposed resonator through asymmetrical feeding. The effect of etched slots is investigated, and design curves for the proposed structure are deduced. Fractional bandwidth from 4% to 25% with reduced harmonic response can be achieved. A bandpass filter is designed at 2.35 GHz with 7.6% fractional bandwidth on RT/Duroid 5880 material with 2.2 dielectric constant and 0.78 mm thickness. Simulations are performed using full wave IE3D simulator. Simulations agree well with the experimental results.

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Section: Introductionmentioning

confidence: 99%

A New Small Size Non-degenerate Dual-mode Patch Filter

Sheta

Al-Eshaikh

2011

Journal of Electromagnetic Waves and Applications

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“…They are widely studied, and different kinds of bandpass filters have been proposed [1][2][3][4][5][6][7][8][9][10][11][12][13][14]. To make the filters more compact, one of the effective ways is to modify the traditional resonator to generate additional modes, causing the resonator to have multiple resonant frequencies, thus one resonator in physical can be treated as multiple resonators in electrical [9].…”

Section: Introductionmentioning

confidence: 99%

Novel Planar Multimode Bandpass Filters With Radial-Line Stubs

Zhang¹,

Yu²,

Mo³

2010

PIER

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Abstract-This paper presents a novel approach for designing planar multimode wideband bandpass filters with good selectivity. The multimode resonator is composed of an open-ended microstrip line with length of half-wavelength (λ/2) and several radial-line stubs. By using different kinds of radial-line loaded stubs, different kinds of responses including three-pole and four-pole bandpass filters can be realized. Depending on electric field distribution and equivalent circuit model, the characteristics of the filter are analyzed. To verify the proposed method, two filters are implemented. The measured results exhibit good agreement with the simulation.

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“…To make the filters more compact, one of the effective ways is to modify the traditional resonator to generate additional modes, causing the resonator to have multiple resonant frequencies, thus one resonator in physical can be treated as multiple resonators in electrical [1]. Among them, dual-mode filter is the most common multiple-mode filter, which has been analyzed deeply and comprehensively in many literatures with various configurations [2][3][4][5][6][7][8]. However, triple-mode or other multimode microstrip planar filters are rarely reported in literatures.…”

Section: Introductionmentioning

confidence: 99%

Design of Triple-Mode Bandpass Filter Using Improved Hexagonal Loop Resonator

Mo¹,

Yu²,

Zhang³

2009

PIER

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Abstract-A novel triple-mode hexagonal bandpass filter with capacitive loading stubs is introduced in this article. The technique, adding an open capacitive stub, is applied to enlarge the equivalent selfcapacitance of the resonator, which declines its resonant frequencies. Three radial-line stubs in the center of top layer are used to implement this technique. One mode resonant frequency is varied with the radii of three radial-line stubs, while the other two modes are nearly not affected. This filter has a pair of transmission zeros which are close to the passband, thus it behaves with high selectivity. For method validation, a bandpass filter operating at 2.4 GHz is fabricated and measured. The experimental results are demonstrated and discussed.

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Novel Design of Dual-Mode Bandpass Filter With Triangular Structure

Cited by 9 publications

References 10 publications

A New Small Size Non-degenerate Dual-mode Patch Filter

A New Small Size Non-degenerate Dual-mode Patch Filter

Novel Planar Multimode Bandpass Filters With Radial-Line Stubs

Design of Triple-Mode Bandpass Filter Using Improved Hexagonal Loop Resonator

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