Design of the Microstrip Bandstop Filter With High Insertion Loss

Wu, Chung‐li; Tang, Ching‐Wen

doi:10.1109/tcpmt.2018.2879898

Cited by 15 publications

(9 citation statements)

References 19 publications

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“…According to Section 5, considering the low cost, the MSBSF is made of F4BM265, and its dielectric constant, thickness of the substrate, and thickness of external microstrip line are 2.65, 1.5 mm, and 0.07 mm, respectively. To make the transmission line of the MSBSF pass through the current of 10A, the unequal width of the coupled structure [23,29] is used. e final layout and the dimensions of the MSBSF are shown in Figure 11(a) and Table 2, respectively.…”

Section: Experiments and Discussionmentioning

confidence: 99%

“…e dual-wideband bandstop filters, which are used in multi-wideband wireless systems, were demonstrated by Feng et al [22]. A planar high insertion loss bandstop filter within a frequency band from 2.79 to 3.21 GHz was developed by Wu et al [23]. However, those microstrip filters are used in low-power communication circuits and devices.…”

Section: Introductionmentioning

confidence: 99%

“…e filter with connected and open stubs can achieve high insertion loss, but the physical width of connected stubs is too narrow to carry a high current. According to[23], the structure of the traditional bandstop filter can be transformed into that of Figure4(c) by using the structure of Figure4(b), and the unequal width of the coupled structure can be used in the structure of Figure4(c), which enables the connected stubs to carry a high current. Hence, Figure4(c) is the structure of the proposed MSBSF for preventing conduction electromagnetic information leakage of highpower transmission line in this paper.…”

mentioning

confidence: 99%

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Microstrip Bandstop Filter for Preventing Conduction Electromagnetic Information Leakage of High-Power Transmission Line

Han

Zhou

et al. 2022

International Journal of Antennas and Propagation

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The research of transient electromagnetic pulse emission monitoring technology (TEMPEST) protection is essential. Based on microstrip bandstop filter (MSBSF), a method to prevent electromagnetic information leakage of high-power transmission lines is proposed in this paper. The MSBSF with a high insertion loss and carrying large current in the frequency of 2.40–2.49 GHz is designed, fabricated, and experimentally measured. The fabricated MSBSF with the insertion loss of 38 dB at 2.41–2.49 GHz can carry a current greater than 10A and withstand a voltage of 1.7 kV. Compared with the traditional electromagnetic interference (EMI) filter, the MSBSF has the advantages of preventing conducted electromagnetic information leakage in the high-frequency bands, carrying greater current subject to higher voltage, and possessing lighter weight. The MSBSF may be used to prevent the leakage of high-frequency electromagnetic information of high-power transmission lines.

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Section: Experiments and Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 99%

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Microstrip Bandstop Filter for Preventing Conduction Electromagnetic Information Leakage of High-Power Transmission Line

Han

Zhou

et al. 2022

International Journal of Antennas and Propagation

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“…By using a microstrip transmission line loaded with L‐ and T‐shaped resonators, a wide bandstop filter can be developed [19]. It is also important for designing absorptive bandstop filters [20], dual stopbands bandstop filters [21], and bandstop filters with high attenuation in the stopband [22].…”

Section: Introductionmentioning

confidence: 99%

Design of a switchable microstrip bandstop filter with signal/dual stopbands

Tang

Fan

2021

IET Microwaves Antenna & Prop

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A switchable bandstop filter is proposed herein. In order to achieve switchability between a single ultra-wide stopband and dual wide stopbands, a complex process of coupling synthesis is not necessarily required. By setting two diodes at the input and output port separately, this bandstop filter can be switched between single and dual stopbands. An exemplary bandstop filter with central frequency at 2 GHz is fabricated on Rogers RO4003C, a substrate with a thickness of 0.813 mm and an area occupying 29.3 � 29.7 mm. Agreement between the theoretical and measured results can validate the proposed circuit.This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

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“…On the contrary, DGFs are implemented on dual metal plane configuration so their design process is more complicated 7 . Spiral DMSs among other DMSs 15‐17 are also preferred for their compact size. Moreover, they present a relatively small insertion loss (IL) and group delay 18 .…”

Section: Introductionmentioning

confidence: 99%

A q uasi‐analytic synthesis methodology for spiral defected microstrip compact bandstop filters

Mehraban

Masoumi

Safavi‐Naeini

2020

Int J RF Microw Comput Aided Eng

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A new quasi-analytical synthesis method is presented for designing spiral defected microstrip structures (DMS). A comprehensive analysis based on circuit models, mathematical relations, and extensive simulations is used to achieve an exact, straightforward, and tunable wide-range frequency design process. The design process benefits of some novel formulas derived based on the overall form of resonance frequency functions and the study of extensive simulations. We used the Levenberg Marquardt Iteration (LMI) algorithm for the derivation of closed-form formulas. The resonance frequency of a spiral DMS called notch frequency can be independently tuned in a large frequency span by employing the proposed method. The designed spiral DMSs and the new synthesis method can be applied to applications such as filters, antennas, amplifiers, and multipliers. The proposed spiral DMS design/synthesis method and the derived closed-form formulas are verified and validated by simulations and fabrication of six filters with different geometries and specifications. A comparison of the simulation and measurement results of the fabricated filters proves the accuracy and validity of the proposed design method and formulas where the relative effort is less than 0.38%. The return loss and group delay of the filters are less than 0.48 dB and 0.5 ns, respectively.

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Design of the Microstrip Bandstop Filter With High Insertion Loss

Cited by 15 publications

References 19 publications

Microstrip Bandstop Filter for Preventing Conduction Electromagnetic Information Leakage of High-Power Transmission Line

Microstrip Bandstop Filter for Preventing Conduction Electromagnetic Information Leakage of High-Power Transmission Line

Design of a switchable microstrip bandstop filter with signal/dual stopbands

A q uasi‐analytic synthesis methodology for spiral defected microstrip compact bandstop filters

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