A Miniaturized Dual-Mode Ring Bandpass Filter

Hsu, Hou-Jun; Lai, Chi-Hui; Ma, Tzyh‐Ghuang

doi:10.1109/lmwc.2010.2063697

Cited by 20 publications

(7 citation statements)

References 6 publications

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“…Another method to design dual-band BPFs with independently adjusted passbands is to combine two sets of resonators [3][4]. Recently, dual-mode resonators and embedded resonators are employed to design BPFs with good performance [5].…”

Section: Introductionmentioning

confidence: 99%

Compact dual-band BPF with improved stopband

He¹,

Yu²,

Wei³

2014

2014 Joint IEEE International Symposium on the Applications of Ferroelectric, International Workshop on Acoustic Transduction M

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A compact dual-band bandpass filter (BPF) with improved stopband characteristics using stepped impedance resonators (SIRs) is presented. Multiple transmission zeros can be realized near the passbands of proposed filter by the cancelling effects of mixed electric and magnetic couplings. Dualband can be achieved by combining two sets of independent resonators with common input/output ports. A 2.4/5.4GHz dualband BPF for wireless local area network (WLAN) has been designed and fabricated to verify the validity of the proposed method. The measurement results show six finite transmission zeros in the stopband for improved stopband.

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Section: Introductionmentioning

confidence: 99%

Compact dual-band BPF with improved stopband

He¹,

Yu²,

Wei³

2014

2014 Joint IEEE International Symposium on the Applications of Ferroelectric, International Workshop on Acoustic Transduction M

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“…To date, many studies to design compact microwave filters have been made by using meander loop resonators, square loop resonators (SLRs) having loaded stubs or interdigital structures [1–4], etc. These resonator types are the most important building blocks of dual‐mode filters which are quite important in many RF/microwave circuits and systems because of their advantages in providing low loss, sharp rejection skirts, low cost, etc.…”

Section: Introductionmentioning

confidence: 99%

“…These resonator types are the most important building blocks of dual‐mode filters which are quite important in many RF/microwave circuits and systems because of their advantages in providing low loss, sharp rejection skirts, low cost, etc. Although there are a few studies on microstrip filters using slow‐wave structures [3, 4], there is no a simple relationship between the periodic loading elements and the resonance frequency, which the size reduction cannot be adjusted.…”

Section: Introductionmentioning

confidence: 99%

Effects of narrow slits on frequency response of a microstrip square loop resonator and dual‐mode filter applications

Karpuz

Görür

2012

Micro & Optical Tech Letters

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In this letter, the effect of narrow slits on resonance characteristics for a microstrip square loop resonator (SLR) with mitered bends is investigated and a new formula to calculate the resonance frequency of SLRs loaded inductively by means of slits is derived as a function of the number of slits.A novel dual‐mode SLR configuration performing a slow‐wave characteristic obtained by using narrow slits is proposed to use in design of microstrip dual‐mode bandpass filters. Also, a new perturbation technique based on the change of electrical lengths is presented for the excitation of two degenerated modes of these type resonators. Additional, two dual‐mode bandpass filters having linear phase and elliptical frequency characteristics have been designed, fabricated and tested to verify the proposed filter topology. Experimental results agree with simulated results. © 2012 Wiley Periodicals, Inc. Microwave Opt Technol Lett 55:143–146, 2013; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.27237

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“…However, these filers require too much area since each resonator has a perimeter of one wavelength to obtain the fundamental resonance. Among the structures designed previously to reduce filter size are an octagonal meander loop resonator [5], disc-shaped open stub-loaded resonator [6], E-shaped resonator [7], and ring resonator with a saw-toothed coupling scheme [8]. Additionally, dual-band bandpass filters are implemented using the dual-mode design method.…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, some works have attempted to reduce the component size by developing an alternative approach to embed a defected ground structure (DGS) resonator in a dual-plane structure [17][18][19]. Nevertheless, the resulting designs of the microstrip bandpass filters in previous works [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19] are still not sizecompetitive with low-temperature co-fired ceramic (LTCC) [20,21] or integrated passive device (IPD) [22] bandpass filters and are difficult to integrate with RF circuits for system-in-package (SiP) applications.…”

Section: Introductionmentioning

confidence: 99%

Very Miniature Dual-Band and Dual-Mode Bandpass Filter Designs on an Integrated Passive Device Chip

Chen¹,

Shih²,

Horng³

et al. 2011

PIER

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Abstract-This work presents extremely compact dual-mode and dual-band bandpass filter designs based on dual-resonance composite resonators developed by using integrated passive device (IPD) technology on a glass substrate.A dual-mode bandpass filter is also devised using a symmetric composite resonator with a perturbation element of grounding inductor to determine the filter bandwidth. Additionally, a feedback capacitive coupling path on the proposed dual-mode filter is implemented to produce three transmission-zero frequencies in the stopband. Furthermore, the proposed dual-band bandpass filter is designed in a high-density wiring transformer configuration with magnetic and electric mixed coupling. In addition to individually determining the fractional bandwidth of dual passbands, the magnetic and electric mixed coupling provides multiple transmission zeros to enhance the isolation between the two passbands and greatly improve the stopband rejection.

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A Miniaturized Dual-Mode Ring Bandpass Filter

Cited by 20 publications

References 6 publications

Compact dual-band BPF with improved stopband

Compact dual-band BPF with improved stopband

Effects of narrow slits on frequency response of a microstrip square loop resonator and dual‐mode filter applications

Very Miniature Dual-Band and Dual-Mode Bandpass Filter Designs on an Integrated Passive Device Chip

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