Novel Compact Tri-Band Bandpass Filter Using Multi-Stub-Loaded Resonator

Gao, Li; Xiang, Jin; Xue, Quan

doi:10.2528/pierc14041504

Cited by 11 publications

(12 citation statements)

References 17 publications

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“…The design in [8] is a dual-band filter based on a tri-mode resonator. It can be expanded to design tri-band filters by adding stubs [5] and high order structure [7]. However, all the three resonators cannot be used to design such a tri-band filter with a wide third bandwidth.…”

Section: Circuit Implementationmentioning

confidence: 99%

“…If the wide 5G WiFi band is covered, it needs more resonators, resulting in large size. Another method is to employ multi-stub-loaded multi-mode resonators [5]- [7]. However, it is difficult to satisfy the bandwidth requirements because the bandwidths of the 2.4 and 3.5 GHz passband are narrow, while the passband centered at 5.5 GHz is wide.…”

Section: Introductionmentioning

confidence: 99%

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Compact Tri-Band Bandpass Filter Using Novel Eight-Mode Resonator for 5G WiFi Application

Gao

Zhang

Xue³

2015

IEEE Microw. Wireless Compon. Lett.

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This letter presents a novel compact tri-band bandpass filter (BPF) with wide third passband to satisfy the requirement of 5G WiFi. The proposed filter utilizes a novel multi-stubloaded resonator with eight resonance modes. By utilizing these modes, a tri-band BPF with controllable operating frequencies is designed. Among the three bands, the highest one is formed by four modes to cover the 5G WiFi band. Each of the other two passbands centered at 2.4 and 3.5 GHz is realized by two modes. To validate the proposed idea, an experimental filter is implemented. Good agreement between the predicated and measured results demonstrates the proposed idea.Index Terms-Tri-band, BPF, eight-mode resonator, compact size.

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Section: Circuit Implementationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Compact Tri-Band Bandpass Filter Using Novel Eight-Mode Resonator for 5G WiFi Application

Gao

Zhang

Xue³

2015

IEEE Microw. Wireless Compon. Lett.

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“…In addition, the stub‐load resonators are also popular used to design the multi‐band BPFs, because they can be used to control the resonance frequencies easily. For example, the center‐stub‐loaded and multi‐stub‐loaded resonators can be utilized to design the dual‐ or tri‐band BPFs . In addition, the stub‐loaded SIR is also suitable to design the tri‐band BPF .…”

Section: Introductionmentioning

confidence: 99%

Compact tri‐band bandpass filter with controllable frequencies

Gao

Xiang

et al. 2016

Micro & Optical Tech Letters

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In this paper, we present a compact tri‐band bandpass filter (BPF). The resonator, which consists of a main transmission line, a center‐loaded open stub and a side‐loaded open stub, is utilized to obtain the three resonance frequencies. After selecting the impedance of each stub at this resonator, the passband frequencies can be controlled individually. Four transmission zeros are generated to enhance the selectivity. For demonstration, a compact tri‐band BPF is implemented. Good agreement between the measured and simulated results is presented to verify the theoretical predication. © 2015 Wiley Periodicals, Inc. Microwave Opt Technol Lett 58:573–577, 2016

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“…Classical resonators include stub-loaded resonators (SLRs), and stepped-impedance resonators (SIRs) were widely used to design triband BPFs [1][2][3][4][5][6][7][8][9][10]. Modified stub-loaded resonator [1][2][3][4] was utilized to design tri-band BPFs. A series of multi-stub loaded resonators were used to design tri-band BPFs [1,2].…”

Section: Introductionmentioning

confidence: 99%

“…Modified stub-loaded resonator [1][2][3][4] was utilized to design tri-band BPFs. A series of multi-stub loaded resonators were used to design tri-band BPFs [1,2]. In the analysis of multi-stub loaded resonator, even-and odd-mode analysis is utilized twice to analyze its resonance characteristics.…”

Section: Introductionmentioning

confidence: 99%

Compact Tri-Band Bandpass Filter Based on Hybrid Resonator With Improved Selectivity Performances

Yang¹,

Chen²,

Wu³

et al. 2015

PIER C

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Abstract-A novel microstrip tri-band bandpass filter is proposed and implemented using hybrid resonator with independently controllable center frequencies and good in-between isolation. This hybrid resonator is constructed by a stepped-impedance stub resonator and a single end shorted resonator. The stepped-impedance stub resonators are applied to achieve the first and second passband, while the third passband is implemented by single end shorted resonators. By applying the even-odd mode approach, the resonance frequency ratio between even mode and odd mode inside the stepped-impedance stub resonators is attained. Furthermore, the filter with multi-path coupling structure can generate the transmission zeros at the edge of the passband, which can effectively improve the filter passband selectivity. Finally, a tri-band filter operating at 1.91, 2.73, and 3.45 GHz is designed and fabricated. The measurement results accord well with the full-wave electromagnetic designed responses.

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Novel Compact Tri-Band Bandpass Filter Using Multi-Stub-Loaded Resonator

Cited by 11 publications

References 17 publications

Compact Tri-Band Bandpass Filter Using Novel Eight-Mode Resonator for 5G WiFi Application

Compact Tri-Band Bandpass Filter Using Novel Eight-Mode Resonator for 5G WiFi Application

Compact tri‐band bandpass filter with controllable frequencies

Compact Tri-Band Bandpass Filter Based on Hybrid Resonator With Improved Selectivity Performances

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