LTCC dual-band stepped-impedance-stub filter constructed with vertically folded structure

Chin, Kuo‐Sheng; Hung, Jian-Luen; Huang, Chun-Wei; Fu, Jianqin; Chen, B.-g.; Chen, T.-j.

doi:10.1049/el.2010.2347

Cited by 16 publications

(7 citation statements)

References 4 publications

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“…One can conclude that the proposed filter provides size reduction over that of other publications; namely about 13% better than [4], the smallest filter in the table. In addition, the proposed filter features insertion loss enhancement; namely it provides the best simulated IL by 9 % better than [5] for the first band and 6 % better than [4] and [6] for the second band.…”

Section: Resultsmentioning

confidence: 99%

“…While in [4], a multilayer two bandpass filters and matching circuits has been adopted to build a packaged dual-band BPF but it suffers from high insertion losses. In addition, [5] proposed a method to construct compact sized dual-band filters using stepped-impedance-stub resonators with vertically folded structure to obtain the dual-band BPF. One of the interesting techniques is found in [6].…”

Section: Introductionmentioning

confidence: 99%

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Design of Compact Dual-Band BPF Based on SIR using LTCC Technology

Elelimy

El-Tager

Sobih

2014

The International Conference on Electrical Engineering

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This paper presents a compact size dual-band BPF embedded in a low temperature cofired ceramics (LTCC) designed to produce two passbands for WiMAX applications. The dual-band BPF center frequencies are 3.5 GHz and 5.8 GHz. A design methodology as well as design guidelines are proposed based on stepped-impedance coupled resonators to produce dual-band response. This dual-band BPF is simulated, optimized and verified. The proposed filter provides better size reduction and at the same time performs superior enhancement in insertion losses and keeps adequate passbands compared to other published dual-band packaged filters.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Design of Compact Dual-Band BPF Based on SIR using LTCC Technology

Elelimy

El-Tager

Sobih

2014

The International Conference on Electrical Engineering

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“…Most of the reported dual‐band BPFs are realized by using the printed circuit board technology, which suffers either high insertion loss [1] or large circuit area [3, 4]. Recently, the technology of low temperature co‐fired ceramic (LTCC) has been widely used for size reduction because of the three‐dimensional (3‐D) circuit layout [5–9]. Accordingly, the LTCC single‐ or dual‐band BPFs based on the lumped/semi‐lumped elements have sprung up in recent years [5, 6].…”

Section: Introductionmentioning

confidence: 99%

Compact LTCC dual‐band bandpass filter with high selectivity using the vertically S‐shaped short‐ended SIR

Chen

Tang

et al. 2013

Micro & Optical Tech Letters

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For the first time, a vertically S‐shaped short‐ended stepped‐impedance resonator (SIR) is proposed to design a compact low temperature co‐fired ceramic (LTCC) dual‐band bandpass filter (BPF).The proposed SIR as a transmission line resonator can be used in high‐frequency application, and the size of the SIR can be miniaturized greatly because it is vertically folded in LTCC. Three transmission zeros in the stopbands are achieved by using the electric and magnetic mixed coupling schemes. The demonstrated dual‐band BPF at 5.8/10 GHz is designed and fabricated. © 2013 Wiley Periodicals, Inc. Microwave Opt Technol Lett 55:1345–1348, 2013; View this article online at wileyonlinelibrary.com. DOI 10.1002/mop.27539

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“…A cross-coupling structure which is between the input and output lines, together with E-shaped microstrip stepped-impedance resonator (SIR), are applied to design a dualwideband bandpass filter [8], whose frequency response characteristics exhibit sharp roll-off that the edge performance of the passband and stopband could be improved. The SIR has become very popular in the design of dual-band filters as it has a dual passband behavior that can easily control the second passband frequency, which is compact in size and has established design equations [9][10][11][12][13]. Most of the work has focused mainly on the dual-band filter.…”

Section: Introductionmentioning

confidence: 99%

A High Selectivity Quadruple-Mode BPF With Two Short-Circuited Stub-Loaded Sirs

Zhou¹,

Liu²,

Guo³

et al. 2011

PIER Letters

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Abstract-In this paper, a high selectivity quadruple-mode bandpass filter (BPF) with source-load coupling is proposed. This filter uses two short-circuited stub-loaded stepped-impedance resonators (SIRs) which have the same type but different size. Two SIRs can generate four operating modes, which can be approximately adjusted individually. Owing to the special design of the filter, the coupling of two resonators is weak. In each resonator, the even-mode frequency can be flexibly controlled by changing the length of the short stub, whereas the odd-mode one remains stationary. Due to the source-load coupling, two transmission zeros are close to the cut-off frequencies of the passband, which leads to high selectivity. Simulated results show that central frequency is 2.27 GHz with 3-dB fractional bandwidth of 22.9%. The measured and simulated results are well complied with each other.

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LTCC dual-band stepped-impedance-stub filter constructed with vertically folded structure

Cited by 16 publications

References 4 publications

Design of Compact Dual-Band BPF Based on SIR using LTCC Technology

Design of Compact Dual-Band BPF Based on SIR using LTCC Technology

Compact LTCC dual‐band bandpass filter with high selectivity using the vertically S‐shaped short‐ended SIR

A High Selectivity Quadruple-Mode BPF With Two Short-Circuited Stub-Loaded Sirs

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