A band-stop filter with wide stop band using T-shaped stepped impedance resonator and L-shaped open stub

Lee, Tae-Hyeon; Kim, Chang-Soon; Son, Kwang Chul; Shin, Kwang Seob; Shrestha, Bhanu; Yoon, Ki‐Cheol

doi:10.1109/etiict.2017.7977028

Cited by 4 publications

(2 citation statements)

References 8 publications

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“…Single band and multi band compact bandstop filters are proposed and fabricated employing T-shaped DMS (defected microstrip structure) with sharp frequency selectivity in [19]. Tri passband filter between (1 to 2.9 GHz) with compact design of band stop filter is proposed by Liu [37].The wideband bandstop filter implemented using SIR (step impedance resonator) embedded with open stubs that attained reasonable insertion loss is proposed in [39].…”

Section: B Bandstop Filtermentioning

confidence: 99%

Design and Analysis of Microstrip Low Pass and Bandstop Filters

Bohra¹,

Ghosh²

2019

IJRTE

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In this paper a simple approach of designing the microstrip low pass and bandstop filter is presented. The microstrip stub based low pass filter with 2.4 GHz and attenuation of more than 60 dB at 4 GHz frequency is designed. The bandstop filter is also designed with notch characteristics at 2.4 GHz frequency. The fractional bandwidth of designed filter is estimated to be 30% with 117 dB of attenuation is recorded at notch frequency of 2.4 GHz in SIR based bandstop filter topology. The bandstop filter is implemented using coupled line structure as well as step impedance resonator techniques. The filters are designed on Roger RC40003C substrate. The design and analysis of filter with its layout and EM simulation is accomplished using Agilent ADS software. These filters can be used in front end transceiver systems, antennas, and modern wireless communication systems.

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Section: B Bandstop Filtermentioning

confidence: 99%

Design and Analysis of Microstrip Low Pass and Bandstop Filters

Bohra¹,

Ghosh²

2019

IJRTE

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“…However, in these examples, there is a feature that the circuit pattern becomes large. To overcome this problem, some methods for compatibility between compactness and broadband by a combination of existing structures, such as spureline, interdigital, and the quarter-wavelength open circuited stub, have been reported [14][15][16][17][18][19][20][21][22][23]. However, the bandwidth becomes narrower because of the trade-off relationship between the size reduction and broadband.…”

Section: Introductionmentioning

confidence: 99%

Compact and Broadband Microstrip Band-Stop Filters with Single Rectangular Stubs

Kusama

Ryota

2019

Applied Sciences

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In this research, a compact and broadband microstrip line quarter-wavelength open circuited stub, which is the core of the band-stop filter, is studied from the viewpoint of the characteristic impedance ratio between the main transmission line and the stub line. Furthermore, a circuit pattern in which an inductive diaphragm is inserted at the stub attachment point using a stepped impedance structure is examined, and an evaluation of frequency adjustment and miniaturization is investigated. The results are compared with the well-known radial stub. Good agreement was obtained between the measured and simulated values up to 5 GHz. Good stop bandwidth was obtained, and the validity of the proposed method is confirmed. The application to other frequency bands is straightforward. The proposed structure is applicable as an alternative to the existing radial stub used for bias T to prevent the reverse flow of the Radio frequency (RF) signal to direct current (DC) source. It is also applicable for the waveguide E-plane band-stop filter, for preventing unwanted leakage from narrow gaps by substituting to a short-circuited stub with a capacitive window, by using the same approach used in the microstrip line H-plane discontinuity.

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