A Novel Quad-Band Bandstop Filter Based on Coupled-Line and Shorted Stub-Loaded Half-Wavelength Microstrip Resonator

Yan, Jun-Mei; Cao, Liangzu; Zhou, Hai-Ying

doi:10.2528/pierl18062403

Cited by 7 publications

(4 citation statements)

References 13 publications

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“…The external Q-factor, which is dominantly attributed to broadside coupling, can be obtained by Eqs. (6) and (12) to get Q (Exp) e1 st = 181 using the measurement data and Q (Sim) e1 st = 200 using simulation data, where subscript "1 st " indicates the 1 st resonance. Such a high value of the external Q-factor can be attributed to the strong broadside coupling between the CPWR and CPWTL.…”

Section: Resultsmentioning

confidence: 99%

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High Q-Factor Bandstop Filter Based on CPW Resonator Broadside-Coupled to CPW Through-Line

Fahmy¹,

Farahat²,

Hussein³

et al. 2020

PIER B

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High Q-factor bandstop filter based on broadside-coupling between U-shaped coplanar waveguide (CPW) resonator and CPW through-line (CPWTL) is proposed in the present paper. The CPWTL is printed on the top layer of the dielectric substrate whereas the CPW resonator (CPWR) is printed on the bottom layer. Only over very narrow frequency band around the resonant frequency of the CPWR the microwave power flowing in the CPWTL is coupled to (absorbed by) the CPWR leading to a bandstop filter of very high Q-factor. A CPWR with side ground strips of finite width is shown to have much higher Q-factor than that of infinitely extending side ground planes. Owing to the lower profile of the CPW with finite-width, the radiation loss is reduced, and the structure has narrower frequency band for coupling, which results in much higher Q-factor than other published works. The dimensions of the CPWTL are optimized for impedance matching whereas the dimensions of the Ushaped CPWR are optimized to obtain the highest possible Q-factor. The effect of the loss tangent of the dielectric substrate material on the Q-factor is investigated. A prototype of the proposed filter is fabricated and experimentally studied for more understanding of the underlying physical principles of operation and for experimental investigation of the filter performance. The experimental measurements show good agreement with the corresponding simulation results.

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Section: Resultsmentioning

confidence: 99%

“…An analogous role is played by the bandstop filter of the satellite transceiver. Multiple-band bandstop filters are required for many applications [9][10][11][12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

High Q-Factor Bandstop Filter Based on CPW Resonator Broadside-Coupled to CPW Through-Line

Fahmy¹,

Farahat²,

Hussein³

et al. 2020

PIER B

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“…2 Radio frequency (RF) filters are one of the most applicable components in communication systems that have some structures like stepped impedance resonators, parallel coupled lines, and multi-mode resonators. [2][3][4][5][6][7][8][9] Another dual-band filter with high rejection at stop-band and small bandwidth (BW) is introduced in Reference 6. A lowpass filter with 1.1 GHz bandwidth high rejection on stop band has been proposed in Reference 7.…”

Section: Introductionmentioning

confidence: 99%

“…The compactness, easy fabrication, and multiple bands covering are three attractive features for the 5G millimeter wave (MMW) devices, such as filters, antennas, and power dividers 2 . Radio frequency (RF) filters are one of the most applicable components in communication systems that have some structures like stepped impedance resonators, parallel coupled lines, and multi‐mode resonators 2‐9 . Another dual‐band filter with high rejection at stop‐band and small bandwidth (BW) is introduced in Reference 6.…”

Section: Introductionmentioning

confidence: 99%

Compact 5G millimeter‐wave dual‐band filter with application in filtenna

Nouri

Jafarieh

Behroozi

et al. 2020

Micro & Optical Tech Letters

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In this article, a dual-band sixth order double symmetric T-slot filter is proposed for the 5G communication systems. This filter contains two duplicate square resonators and a T-shape feedline on the Rogers RT duroid 5880 substrate. Operating at the 28 and 38.5 GHz frequencies from licensed 5G frequency bands and small size make this filter appropriate for different 5G applications. Furthermore, an LC equivalent circuit for the filter has been considered that helps us to have a better sight of this filter. Measurement results show good agreement with simulations. The attenuation on the passband is less than 1 dB. In order to evaluate the filter performance besides other millimeter waves components, a wideband antenna is combined with the filter to form a filtenna. The achieved results show the appropriate performance and well-matched with other 5G devices.

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New highly narrowband miniature microstrip bandpass and bandstop filters based on SIR components for wireless systems

Mezaal

2021

Electromagnetics

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A Novel Quad-Band Bandstop Filter Based on Coupled-Line and Shorted Stub-Loaded Half-Wavelength Microstrip Resonator

Cited by 7 publications

References 13 publications

High Q-Factor Bandstop Filter Based on CPW Resonator Broadside-Coupled to CPW Through-Line

High Q-Factor Bandstop Filter Based on CPW Resonator Broadside-Coupled to CPW Through-Line

Compact 5G millimeter‐wave dual‐band filter with application in filtenna

New highly narrowband miniature microstrip bandpass and bandstop filters based on SIR components for wireless systems

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