Design of Dual-Band Bandpass Filter With Simultaneous Narrow- and Wide-Bandwidth and a Wide Stopband

Weng, Min Hang; Lan, Siang-Wen; Chang, Shoou Jinn; Yang, Rong‐Can

doi:10.1109/access.2019.2946302

Cited by 20 publications

(16 citation statements)

References 20 publications

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“…With the development of modern communication technology, Various multi-band filters [13]- [16] are proposed to develop communication systems with multi-band operation mode to increase data capacity. Fig.…”

Section: Introductionmentioning

confidence: 99%

Novel Single-Ended-to-Balanced Filter With Reconfigurable Working Modes, Frequency, Bandwidth, and Single/Dual-Band Operations

2021

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A novel single-ended-to-balanced (SETB) filtering circuit is proposed in this paper. The proposed circuit not only integrate controllable working modes between SETB filtering and SETB filtering power dividing (FPD) into one unit, but also has multi-level reconfigurable capabilities including tunable center frequencies, bandwidths, and switchable single/dual-band operations. It is constructed by a 5-port symmetrical microstrip network. By properly engineering the transmission response of the even and odd mode of the proposed circuit, the multiple reconfigurable functions can be realized in just one circuit in a mathematically sound way. The working modes between SETB filtering and SETB FPD are switched by leaving the corresponding ports open, while the control of center frequency, bandwidth, and single/dual-band operation is realized by tuning the capacitance value of loaded varactors. Detailed theoretical and experiment results have been given with good agreement. INDEX TERMS Bandpass filter, dual-band filter, reconfigurable filter, single to balanced filter, single to balanced filtering power divider.

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Section: Introductionmentioning

confidence: 99%

Novel Single-Ended-to-Balanced Filter With Reconfigurable Working Modes, Frequency, Bandwidth, and Single/Dual-Band Operations

2021

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“…In [13], a dual-band differential bandpass filter is designed by coupling two identical stepped impedance square RLRs and its frequency selectivity is improved by utilizing a sourceloaded coupling structure. Weng et al [14] used a stepped impedance RLR to design a dual-band bandpass filter with a narrow first passband and a wide second passband and tapped rectangular stub loaded resonators on the input and output ports to obtain a wide stopband. To achieve two wide passbands, dual-band bandpass filers based on the cascade of dual-passband transversal filtering sections with two loading stubs are presented in [15], while the two passbands are frequency-symmetrical, which is difficult to control the center frequency independently.…”

Section: Introductionmentioning

confidence: 99%

A Compact Dual-Wideband Bandpass Filter Based on Open-/Short-Circuited Stubs

Liang

Chen

2020

IEEE Access

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A dual-wideband bandpass filter is proposed and analyzed, which is based on loaded open-/short-circuited stubs. The dual-band filter consists of a second-order bandpass filter and a third-order bandpass filter, which can be designed separately. The bandwidth of two passbands can be adjusted by tuning the impedance and the length of the stubs. A dual-band bandpass filter prototype operating at 2.4/5.2 GHz is designed for demonstration. It shows a low insertion loss of 0.3 dB and wide bandwidth of 51.9% at 2.4 GHz and 23.3% at 5.2 GHz. The filter structure is simple without narrow coupling gap between resonators, which is easy for fabrication.

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“…Recently, a new quadruple-mode steppedimpedance square ring loaded resonator (SRLR) is anticipated, to design a high-performance dual-band differential BPF with FBWs of 10.4% and 3.6% respectively [10]. The filter in [11] also has utilized the SRLR to design a dual-narrow and wide-bandwidths BPF with FBWs of 8% and 39% and multi transmission zeros are produced near each passband edge, hence improving the selectivity of the passbands. A compact wide-band BPF is presented in [12] with wide bandwidths (51.9% at 2.4 GHz and 23.3% at 5.2 GHz) by using the structure of open-/short-circuited stubs that provided the flexibility of manipulating the center frequencies by altering the impedance and the length of the stubs.…”

Section: Introductionmentioning

confidence: 99%

Design of A Dual-Wide Band BPF Utilizing Parallel Coupled Microstrip Lines and A Centered Arrow-Shaped Resonator

Khudaraham

Naji²

2020

NJES

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This paper presents a dual wide-band band pass filter (DWB-BPF) by using two parallel, symmetrical micro-strip lines loaded by a centered resonator, consisting of a T- and a triangle-shaped geometry, attached at the lower and upper ends, respectively. The filter reveals good performance and both the passbands can be independently controlled by adjusting specific parts of the filter. The proposed BPF is simulated by using CST microwave studio package and the simulated result is verified experimentally with good agreement between the two results. The fabricated prototype BPF demonstrates two passbands located at 2.3 GHz and 6.35 GHz center frequencies with 39% and 23.6% of 3-dB fractional bandwidth (FBW), respectively and a good insertion and return losses. The designed BPF can be targeted for wireless local area network (WLAN), WIFI and satellite communication systems.

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Design of Dual-Band Bandpass Filter With Simultaneous Narrow- and Wide-Bandwidth and a Wide Stopband

Cited by 20 publications

References 20 publications

Novel Single-Ended-to-Balanced Filter With Reconfigurable Working Modes, Frequency, Bandwidth, and Single/Dual-Band Operations

Novel Single-Ended-to-Balanced Filter With Reconfigurable Working Modes, Frequency, Bandwidth, and Single/Dual-Band Operations

A Compact Dual-Wideband Bandpass Filter Based on Open-/Short-Circuited Stubs

Design of A Dual-Wide Band BPF Utilizing Parallel Coupled Microstrip Lines and A Centered Arrow-Shaped Resonator

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