A novel compact bandstop filter using defected microstrip structure

La, Dong‐Sheng; Lu, Yinghua; Sun, Siyang; Liu, Ning; Zhang, Jingling

doi:10.1002/mop.25708

Cited by 25 publications

(25 citation statements)

References 5 publications

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“…Defected microstrip structure (DMS) can be created by etching patterned structure on the signal strip and has been widely used in the applications of microwave devices [16][17][18][19][20][21][22], especially for the compact bandstop filter design due to its obvious stopband characteristic and slow-wave effect [19,20]. Here, the MS-DMS shown in Fig.…”

Section: Meandered Slot Defected Microstrip Structurementioning

confidence: 99%

“…To this end, the MS-DMS and the recently presented Mshaped DMS in Fig. 1(b) [20] are simulated by the full-wave EM solver Ansoft HFSS with the same occupied area. The substrate employed in the simulations has a relative permittivity of 2.55, a thickness of 1.5 mm, and a loss tangent of 0.002.…”

Section: Meandered Slot Defected Microstrip Structurementioning

confidence: 99%

“…Configuration of (a) the proposed MS-DMS and (b) the M-shaped DMS in [20]. where c is the free-space speed of light, L slot the total length of the meandered slot.…”

Section: Meandered Slot Defected Microstrip Structurementioning

confidence: 99%

See 2 more Smart Citations

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

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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.

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Section: Meandered Slot Defected Microstrip Structurementioning

confidence: 99%

Section: Meandered Slot Defected Microstrip Structurementioning

confidence: 99%

See 1 more Smart Citation

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

“…Additionally, DMS cannot affect the ground plane. After that, lots of DMSs have been reported for the stop-band filter or pass-band filter design [8]- [11], which includes two vertical narrow slots or spurline. Moreover, these DMS structures are also used for filtering antenna and stop-band filters [12]- [14].…”

Section: Introductionmentioning

confidence: 99%

Design and Analysis of a Triple Stop-band Filter Using Ratioed Periodical Defected Microstrip Structure

Jiang

Wang

2017

Frequenz

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In this paper, a triple stop-band filter with a ratioed periodical defected microstrip structure is proposed for wireless communication applications. The proposed ratioed periodical defected microstrip structures are spiral slots, which are embedded into a 50 Ω microstrip line to obtain multiple stop-bands. The performance of the proposed triple stopband filter is investigated numerically and experimentally. Moreover, the equivalent circuit model of the proposed filter is also established and discussed. The results are given to verify that the proposed triple stop-band filter has three stop bands at 3.3 GHz, 5.2 GHz, 6.8 GHz to reject the unwanted signals, which is promising for integrating into UWB communication systems to efficiently prevent the potential interferences from unexpected narrowband signals such as WiMAX, WLAN and RFID communication systems.

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“…Recently, the various new filters based on defected microstrip structure (DMS) have been broadly studied. [8][9][10][11][12][13][14][15][16] In [8], a novel bandstop filter comprised of two cascaded M-shape slots etched on the 50-Ω microstrip transmission line has been investigated. In [9,10], two DMS filters with single-and multi-bandgap characteristics have been reported.…”

Section: Introductionmentioning

confidence: 99%

Wideband dual-mode bandpass filter using a modified right-triangular patch resonator overlapped with input/output DMS

Chen

Ke-song

et al. 2013

Journal of Electromagnetic Waves and Applications

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A novel and compact dual-mode wideband bandpass filter (BPF) with multiple transmission zeros is designed, fabricated, and measured in this paper. This filter consists of a modified right-triangle patch resonator with two orthogonal narrow-strip stubs and improved input/output defected microstrip structure (DMS). The designed resonator and DMS show dual-mode and dual-bandgap characteristics, respectively. The equivalent circuit models are described and their element values are also extracted by the full-wave EM simulator. The presented BPF is constructed by cascading the stub of patch resonator with the input/output DMS and overlapping partly with each other between the stub of resonator and middle conductor strip of input/output DMS. The EM simulated result has been confirmed by an experimental one and they have shown good agreement with each other. The measured result exhibits wide passband and low insertion loss characteristics for the proposed filter. IntroductionWith the rapid development of modern mobile communication systems, the miniaturized, low-cost, and wideband filters with lower insertion loss and higher frequency selectivity have been increasing demands in many wireless applications. Among these filters, dual-mode resonator filters have been widely used for their compact size.[1-7] The microstrip dual-mode triangular patch resonators and their applications for dual-mode filters with less than 10% 3-dB fractional bandwidth (FBW) have been investigated in [1]. A dual-mode bandpass filter (BPF) with 3-dB FBW of 16% using a pair of spur-line resonators has been reported in [2]. A single-slotted circular patch resonator has been used to design a dual-mode dual-band BPF, which has a 3-dB FBW of less than 10% in any passband.[3] A BPF based on E-shaped dual-mode resonator has been designed and implemented, which has a FBW of 2%.[4] In [5], a dual-mode half wavelength resonator filter with centrally loaded open stub and quasi-L-shaped feed-lines has been reported, which has a narrow FBW of 4.7% at the central frequency. A fourth-order dual-mode microstrip BPF with a FBW of 11% has been developed in [6]. In general, the insertion losses of above-mentioned filters are greater than 1.0 dB within their passbands. A coupled-line BPF using dual-mode half-wavelength SIR centrally loaded with shorted stub has been studied in [7], which has a suppression characteristic for high-order harmonics, however, the dual-mode filter still has a narrow bandwidth and high insertion

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A novel compact bandstop filter using defected microstrip structure

Cited by 25 publications

References 5 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 and Analysis of a Triple Stop-band Filter Using Ratioed Periodical Defected Microstrip Structure

Wideband dual-mode bandpass filter using a modified right-triangular patch resonator overlapped with input/output DMS

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