Compact Dual-Band Bandpass Filter Using Folded Sir With Two Stubs for Wlan

Ma, Dechen; Xiao, Zhisong; Xiang, Liangliang; Xiao-huan, WU; Huang, Chunyan; Kou, Xin

doi:10.2528/pier11040201

Cited by 59 publications

(53 citation statements)

References 14 publications

(11 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…There is an increasing trend of multifunctional and frequencyagile wireless systems to achieve high integrity, miniaturization, multifunction and flexibility [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15]. In developing such systems, dualand triple-band bandstop filters are essential components, which can suppress the unwanted concurrent signals at separate frequencies [7][8][9][10][11][12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Design of Planar Dual and Triple Narrow-Band Bandstop Filters With Independently Controlled Stopbands and Improved Spurious Response

Ning¹,

Wang²,

Xiong³

et al. 2012

PIER

View full text Add to dashboard Cite

Abstract-A novel design of planar dual and triple narrow-band bandstop filter is presented by adopting the proposed meandered slot defected microstrip structure (MS-DMS) and the simplified spiral microstrip resonator (SSMR). Through this design, the stopbands of the dual-and triple-band bandstop filters can be individually controlled and the improved spurious responses are achieved. First, the fundamental and the first spurious resonances of the MS-DMS and SSMR are analyzed to provide the design rules. Then, by utilizing the prominent stopband of the MS-DMS and the stopband produced by the SSMR coupled to main microstrip line, a dual narrowband bandstop filter is constructed before its design procedure is outlined. Based on above investigations, a triple narrow-band bandstop filter is implemented by inserting extra SSMRs to another side of the main microstrip line of the dual-band filter to generate a new stopband. To verify the aforementioned design concepts, a dual and triple narrow-band bandstop filter are designed, simulated and tested. Both the simulation and measurement indicate that the fabricated filters exhibit good stopband/passband performance and improved first spurious resonance. Moreover, these filters are simple to design and quite compatible with planar fabrication technique, making them very attractive for practical applications.

show abstract

Section: Introductionmentioning

confidence: 99%

Design of Planar Dual and Triple Narrow-Band Bandstop Filters With Independently Controlled Stopbands and Improved Spurious Response

Ning¹,

Wang²,

Xiong³

et al. 2012

PIER

View full text Add to dashboard Cite

show abstract

“…Since then, efforts have been made to realize various kinds of filter configurations for the purpose of wideband and ultra-wideband uses [2][3][4][5][6][7]. In fact there is an issue of a possible electromagnetic interference over the allocated bandwidth of the UWB system, i.e., some narrow bands for other communication systems may exist in this band, such as wireless local area networks (WLANs) [8][9][10]. Therefore, the direct sequence ultra-wideband (DSUWB) specification for wireless personal area networks (WPANs) may be further divided into a lower band of 3.1-4.9 GHz and an upper band of 6.2-9.7 GHz [11].…”

Section: Introductionmentioning

confidence: 99%

Design Filters Using Tunable E-Shaped Dual-Mode Resonators for Lower-Ultra-Wideband and Upper-Ultra-Wideband Applications

Wu¹,

Liao

Xiong³

et al. 2013

PIER C

View full text Add to dashboard Cite

Abstract-Two ultra-wideband (UWB) microstrip bandpass filters (BPFs) are proposed by using tunable E-shaped dual-mode microstrip Stepped-Impedance Resonator (SIR). For the lower band filter measurement results show there is a passband of 3.1 GHz to 5.2 GHz and its 3 dB fractional bandwidth is 51%. The UWB upper band filter may be obtained by tuning E-shaped SIR. The measurement results show there is a passband of 6 GHz to 10.6 GHz and its 3 dB fractional bandwidth is 55%. Compared with the similar investigation using the cascade of electromagnetic band gap (EBG)-embedded multiple-mode resonator (MMR) and fork resonator, the proposed approach has some advantages, such as easier adjustment of bandwidths, better passband performances and smaller size etc..

show abstract

“…For instance, stepped impedance resonators (SIRs) had been implemented to realize dual-band BPFs. The dual-band BPFs using SIRs had attractive features such as, simple and compact structure in [2,3], low insertion loss in [4], high isolation in [5]. However, independently controllable bandwidths and passband frequencies were not mentioned in these papers.…”

Section: Introductionmentioning

confidence: 99%

High-Order Dual-Band Bandpass Filter With Independently Controllable Frequencies and Bandwidths

Chu

Li²

2012

PIER C

View full text Add to dashboard Cite

Abstract-A multi-stub-loaded resonator is presented in this paper. The resonators can be conveniently applied to design high-order dual-band bandpass filters (BPFs). Base on the analysis of the resonator, the first two even-mode resonant frequencies are controlled independently by the lengths of the loaded stubs. Two high-order dual-band BPFs using the first two even-mode resonant frequencies of the multi-stub-loaded resonators are proposed. The bandwidth of each passband can be adjusted independently by the coupling strength of the adjacent resonators. This paper deals with the analysis and design of the proposed high-order dual-band BPFs as well as the experimental validations of the predicted dual-band performance.

show abstract

Compact Dual-Band Bandpass Filter Using Folded Sir With Two Stubs for Wlan

Cited by 59 publications

References 14 publications

Design of Planar Dual and Triple Narrow-Band Bandstop Filters With Independently Controlled Stopbands and Improved Spurious Response

Design of Planar Dual and Triple Narrow-Band Bandstop Filters With Independently Controlled Stopbands and Improved Spurious Response

Design Filters Using Tunable E-Shaped Dual-Mode Resonators for Lower-Ultra-Wideband and Upper-Ultra-Wideband Applications

High-Order Dual-Band Bandpass Filter With Independently Controllable Frequencies and Bandwidths

Contact Info

Product

Resources

About