Dual-band filter using multilayer structures and embedded resonators

Djaiz, A.; Denidni, Tayeb A.; Nedil, Mourad

doi:10.1049/el:20070300

Cited by 11 publications

(10 citation statements)

References 3 publications

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“…1. The three stubs are located centrally between the R 2 and R 3 which are used to enhance the coupling between R 2 and R 3 instead of the utility of the gap coupling [2]. Each stub is located centrally between R 2 and R 3 and in parallel with them.…”

Section: Analysis Of the Proposed Dual-band Filtermentioning

confidence: 99%

“…Therefore, the systems prefer multiband transceiver to multiple single band ones. To response this need, multi-band BPFs are intensively investigated and various design approaches have been reported [1,2,3,4,5,6,7]. The dual-band BPF can be realized by utilizing planar filter with open-loop resonator [1].…”

Section: Introductionmentioning

confidence: 99%

“…However, the open-loop dual-band BPFs normally occupy larger circuit size due to the parallel or cascaded structures. In order to reduce the size, stepped-impedance resonators (SIRs) with multi-layer structure has been reported in [2] with controlling lower and upper passbands. To fabricate the dual band open-loop resonators in a single layer, multiple open-loop resonators have been embedded at the ends of the first passband open-loop resonator [3,4,5].…”

Section: Introductionmentioning

confidence: 99%

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A controllable compact dual-band bandpass filter using loaded open-loop resonators

Gaoding

2016

IEICE Electron. Express

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Abstract:A compact composite open-loop resonator based dual-band band-pass filter (BPF) with high selectivity is presented. The outer openloop and inner open-loop are corresponding to the first and second frequency passbands, respectively. The middle ring is used as the couping ring. The analysis of these open-loops has also been performed to indicate the resonance condition of the proposed filter. To demonstrate the proposed concept, the filter is fabricated with a compact size, which is 10.20 mm × 18.32 mm. The microstrip line filter is validated and measured with two passbands centered at f 1 = 3.00 GHz and f 2 = 5.34 GHz. The simulation and measured results are in good agreement.

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Section: Analysis Of the Proposed Dual-band Filtermentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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A controllable compact dual-band bandpass filter using loaded open-loop resonators

Gaoding

2016

IEICE Electron. Express

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“…As initial investigations on constructing a multiband filter that has multiple passbands, there have been reports on dual-band bandpass filters (DBPFs) [2]- [7]. For example, a half wavelength stepped-impedance resonator is employed in the design of a 2.4-/5.2-GHz band DBPF in [6].…”

Section: Introductionmentioning

confidence: 99%

New CPW Quarter-Wavelength Resonator with Open Stubs for Multipole Dual-Band Bandpass Filter

Satoh¹,

Takagi²,

Narahashi³

2008

2008 38th European Microwave Conference

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This paper proposes a newly developed CPW quarterwavelength resonator with open stubs for use in a multipole dualband bandpass filter. The proposed resonator has odd-and evenmode resonant frequencies that are configured using the space between the center conductor and the open stubs. It is easy to configure independently the odd-and even-mode coupling coefficients because the two resonant modes have different current density distributions. We design and fabricate a fourpole Chebyshev 2.0-/3.5-GHz band bandpass filter to investigate the validity of the proposed resonator. The proposed resonator is suitable for use in a multipole dual-band bandpass filter.

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“…The design allowed the middle stopband to be tuned to have either narrow or wide separation. Interesting research reported by [5] and [6], introduced the steppedimpedance resonator (SIR) configuration and embedded openloop stepped impedance resonator (OLRs) into stepped impedance resonator (SIRs) respectively using multilayer technique. This technique had successfully miniaturized the filter sizes when compared to the conventional single layer filter.…”

mentioning

confidence: 99%

Multilayer dual-mode dual-band bandpass filter

Wahab

Khan

Salleh

et al. 2014

2014 Loughborough Antennas and Propagation Conference (LAPC)

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This paper presents a single ring resonator using multilayer technique for dual-band bandpass filter. The resonator is composed of two resonators with each one having a quarter-wavelength coupled-line connected in series to a transmission line. The two resonators are arranged in parallel to form a single ring dual-band bandpass filter topology. The controlling impedance parameters of this ring are Z r for the transmission line and even-and odd-mode characteristic impedances i.e. Z oe and Z oo for the coupled-lines. Observations on the controlling parameters are conducted to investigate the effect of each parameters in terms of bandwidth, matching level and the transmission zeros. For validation, the filter is realized using multilayer technique, designed at 2 GHz on FR-4 microstrip substrate. The results exhibited good isolation between the two passbands with centered transmission zero attenuated above 40 dB while the centered frequencies were found at 1.59 GHz in the first passband and 2.41 GHz in the second passband. The simulated and measured result is presented throughout this paper to validate the concept.

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Dual-band filter using multilayer structures and embedded resonators

Cited by 11 publications

References 3 publications

A controllable compact dual-band bandpass filter using loaded open-loop resonators

A controllable compact dual-band bandpass filter using loaded open-loop resonators

New CPW Quarter-Wavelength Resonator with Open Stubs for Multipole Dual-Band Bandpass Filter

Multilayer dual-mode dual-band bandpass filter

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