Synthesis of Dual-Wideband Bandpass Filters With Source-Load Coupling Network

Zhang, Runqi; Li, Zhu

doi:10.1109/tmtt.2014.2300047

Cited by 41 publications

(38 citation statements)

References 29 publications

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“…Many dual band filters have recently been designed to satisfy such demanding requirements. However, many of these that are also miniaturized fail to fully cover all the required bands, especially at the lower frequencies due to the narrower dual bandwidth, or their size or thickness makes them difficult to integrate within mobile devices or portable wireless modules …”

Section: Introductionmentioning

confidence: 99%

“…To the best of authors' knowledge, these structures realize for the first time dual wideband and wide stop band resulting from the restriction of high order harmonic frequencies at the same time in dual wideband and asymmetric SIR filters . Moreover, the proposed structures use the capacitive coupling of only two miniaturized resonators to realize dual‐wideband and quad‐wideband responses without such extra structures such as via holes or defected ground planes, and so are unique among dual‐wideband and quad‐wideband filters . The filters are simulated and optimized using CST microwave studio software…”

Section: Introductionmentioning

confidence: 99%

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New multi‐standard dual‐wideband and quad‐wideband asymmetric step impedance resonator filters with wide stop band restriction

Al‐Yasir

Parchin

et al. 2019

Int J RF Microw Comput Aided Eng

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New multi‐standard wide band filters with compact sizes are designed for wireless communication devices. The proposed structures realize dual‐wideband and quad‐wideband characteristics by using a new skew‐symmetrical coupled pair of asymmetric stepped impedance resonators, combined with other structures. The first and second dual‐wideband filters realize fractional bandwidths (FBW) of 43.2%/31.9% at the central frequencies (CF) of 1.875/1.63 GHz, and second bandwidths of 580 MHz/1.75 GHz at CF of 5.52/4.46 GHz, respectively. The proposed quad‐band filter realizes its first/second/third/fourth pass bands at CF 2.13/5.25/7.685/9.31 GHz with FBW of 46.0%/11.4%/4.6% and 5.4%, respectively. The wide pass bands are attributed to the mutual coupling of the modified ASIR resonators and their bandwidths are controllable by tuning relative parameters while the wide stop band performance is optimized by the novel interdigital cross coupled line structure and parallel uncoupled microstrip line structure. Moreover, the quad band is generated by introducing the novel defected rectangle structure. These multi‐standard filters are simulated, fabricated and measured, and measured results agree well with both simulated results and theory predictions. The good in‐band and out‐of‐band performances, the miniaturized sizes and simple structures of the proposed filters make them very promising for applications in future multi‐standard wireless communication.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

New multi‐standard dual‐wideband and quad‐wideband asymmetric step impedance resonator filters with wide stop band restriction

Al‐Yasir

Parchin

et al. 2019

Int J RF Microw Comput Aided Eng

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“…Conventional approaches to the realization of DBBP filters make use of a variety of structures, such as comblines , signal interference , C‐sections , spurlines , and separate signal paths . An extensive class of structures make use of coupled stepped impedance resonators or coupled lines , multimode resonators or various stepped stubs or stepped impedance resonators .…”

Section: Introductionmentioning

confidence: 99%

An asymmetrical dual band bandpass filter

Malherbe

2016

Micro & Optical Tech Letters

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A dual band bandpass filter consisting of a cascade of unit elements and shunt connected stepped open and stepped short circuited stubs, is described. The dual passbands can have unequal, asymmetrical width; the stop‐bandwidth between the desired bands and the harmonic upper bands is substantially increased. A prototype filter that finds application in communication systems is developed. © 2016 Wiley Periodicals, Inc. Microwave Opt Technol Lett 59:163–168, 2017

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“…High-performance filters represent a critical and substantive portion of any communication system [1][2][3][4][5][6][7]. To improve the filter performance in the microwave and millimeter-wave regimes, the power losses due to conduction and radiation must be reduced as low as possible [8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Propagation and Radiation Characteristics of Multilayer Coupled-Line Bandpass Filters Using Conductor-Backed Coplanar Transmission Lines

Kuo¹,

Liou²,

Mao³

2015

PIER C

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Abstract-This paper presents the analytical design formulas for the bandpass filters which are built on the asymmetrically coupled-line conductor-backed coplanar transmission lines (CBCTLs) in multilayer configuration. The full-wave simulation is employed to characterize the far-field patterns of space-wave and surface-wave radiations as well as the frequency-dependent conductor, dielectric, and radiation losses. Good agreement among the results of full-wave simulation, transmission-line model, and measurement justifies the design procedure and validates the analytical design formulas. By properly placing the dielectric materials in multilayer configuration, a bandpass filter for minimizing the radiated power loss and improving the stopband characteristic can be achieved.

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Synthesis of Dual-Wideband Bandpass Filters With Source-Load Coupling Network

Cited by 41 publications

References 29 publications

New multi‐standard dual‐wideband and quad‐wideband asymmetric step impedance resonator filters with wide stop band restriction

New multi‐standard dual‐wideband and quad‐wideband asymmetric step impedance resonator filters with wide stop band restriction

An asymmetrical dual band bandpass filter

Propagation and Radiation Characteristics of Multilayer Coupled-Line Bandpass Filters Using Conductor-Backed Coplanar Transmission Lines

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