Miniature microstrip stepped impedance resonator bandpass filters and diplexers for mobile communications

Sheta, Abdel Fattah; Coupez, Jean-Philippe; Tanné, Gérard; Toutain, S.; Blot, Jean-Pierre

doi:10.1109/mwsym.1996.511007

Cited by 39 publications

(34 citation statements)

References 7 publications

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“…Generally the junction circuit design is more complex and critical part of the Diplexer because the matching circuit may provides easy independent design for each filter. [3]- [6]..Folded coupled-line structure proposed in [4] and dual-mode Stripline ring resonators are used to produce transmission zeros to improve the selectivity of the Diplexer. Skew symmetric feed structure is used.…”

Section: Introductionmentioning

confidence: 99%

“…Many application need High Isolation and selectivity. Filters with asymmetric responses are very suitable for duplexer applications, because it make the use of band-width more efficient [3]. Coplanar-waveguide diplexer is using in planar lumped-elements to realize lowpass and bandpass filter in diplexer structure.…”

Section: Introductionmentioning

confidence: 99%

“…T-shaped gives better isolation. [3].But Stripline technology is very difficult to fabricate and design. A compact diplexer is implemented by using Slotline hairpin Stepped Impedance Resonator (SIR) in ground plane [10].…”

Section: Introductionmentioning

confidence: 99%

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Design of RF Diplexer for Mobile Communication

Brinda¹,

Parveen²

2014

IJCA

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In this paper, a matching circuit for RF diplexer for mobile communication is proposed. Most wanted bands in wireless technologies like GSM and DCS is used. Both bands are designed by using stepped impedance resonators with single order and matching between this two are implemented by Yjunction method. Cutoff frequency for GSM and DCS band are 925 MHz and 1795 MHz. Microstrip Technology is proposed because it provides a better insertion loss, better return loss and good isolation between the passbands. The isolation between two operating bands is better than -50 dB. The overall insertion loss obtained in diplexer is -0.4 dB. The overall return loss is less than -20 dB.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Design of RF Diplexer for Mobile Communication

Brinda¹,

Parveen²

2014

IJCA

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“…It is sometimes necessary to suppress some or all harmonic responses. Several papers have been published on compact filters employing single [1][2][3][4] and dual modes [5][6][7][8]. On the other hand, several papers have also been published on harmonic suppression [9][10][11][12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

A Modified Hair-Pin Resonator for the Design of Compact Bandpass Filter With Suppression of Even Harmonics

Lee

Su²,

Haldar³

2012

PIER C

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Abstract-A new design consideration is explored for a hair-pin resonator. A grounding via at the mid-point of the resonator acts as a perturbation to split the resonant frequencies. The via also suppresses even harmonics of the fundamental. The principle operation of the hair-pin resonator with a via is analyzed and verified by measurement. It is shown that such a hair-pin resonator can be made more compact using stepped impedance line. A compact 4-pole bandpass filter using the modified compact hair-pin resonator with a via is demonstrated. Simulation and measured results showed good agreement.

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“…Many microwave diplexers have been described in the literature. However, they are mostly micro-strip or stripline diplexers [2][3][4][5], which may not be directly applicable to portable telephones, due to their large sizes and difficult implementation with multi-layer structure using LTCC for compactness. Some lumped-element diplexers with maximally flat (Butterworth) response that are suitable for LTCC fabrication have been reported [6,7].…”

Section: Introductionmentioning

confidence: 99%

Compact multi‐layer diplexer for dual mode portable telephones

Lee

2003

Micro & Optical Tech Letters

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A new compact and effective lumped‐element diplexer structure targeted for low‐temperature co‐fired ceramic (LTCC) implementation that can exhibit high levels of isolation between low‐pass and high‐pass filters is proposed. Design equation formulations that take into account the isolation between the two filters are presented. As an example, a multilayer ceramic (MLC) chip diplexer in a dual‐mode portable telephone for 900‐MHz digital‐cellular and 1.9‐GHz personal communication systems is designed and fabricated. The simulated results are compared with the measured data and good agreement is reported. © 2003 Wiley Periodicals, Inc. Microwave Opt Technol Lett 39: 237–239, 2003; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.11179

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Miniature microstrip stepped impedance resonator bandpass filters and diplexers for mobile communications

Cited by 39 publications

References 7 publications

Design of RF Diplexer for Mobile Communication

Design of RF Diplexer for Mobile Communication

A Modified Hair-Pin Resonator for the Design of Compact Bandpass Filter With Suppression of Even Harmonics

Compact multi‐layer diplexer for dual mode portable telephones

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