Ultra-wideband bandstop filter with multiple transmission zeros using in-line coupled lines for 4G/5G mobile applications

Dardeer, Osama M.; Elsadek, Hala; El‐Hennawy, Hadia; Abdallah, Esmat A.

doi:10.1016/j.aeue.2021.153635

Cited by 9 publications

(2 citation statements)

References 14 publications

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“…Also, a multiple-mode H-shaped ring resonator is used to improve passband selectivity while the half-wavelength and quarterwavelength resonators are employed to develop in-band rejection characteristics [14]. UWB filter bandstop property can be achieved by the open-circuited stubs (OCSs) amended with a single couple line section, and simultaneously filter selectivity is enhanced by two-unit cells of inline structure connected in parallel to each other [15]. Aside from that, notch generation process by a short stub resonant network loaded with an LC resonator and π resonator is also reported [16].…”

Section: Introductionmentioning

confidence: 99%

Design of a Miniaturized Split-ring Resonator Based UWB Notched Bandpass Filter

Chakraborty¹,

Panda²,

Deb³

et al. 2023

PIER C

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A compact selective ultra-wideband (UWB) bandpass filter primarily based on a multimode resonator is presented in this paper. A modified elliptical split-ring resonator (SRR) embedded in a variant of the ring resonator is employed to configure a microstrip UWB triple-notched bandpass filter with improved in-band and out-of-band filter properties. Further, the bent inter-digital coupled lines with apertures at the backside are applied to overall filter size miniaturization apart from contributing tight coupling through the entire structure. The three notches facilitated by the modified elliptic SRR have gained the ability to suppress the wireless local area network (WLAN) (5.48 GHz), C band RADAR (7.68 GHz), X band RADAR (8.82 GHz) interfering signals profoundly within the UWB. Simultaneously, the other filter attributes likely a uniform forward transmission coefficient with minimum attenuation (0.46 dB ∼ 1.52 dB), a high skirt factor (0.88), a wide passband (6.52 GHz) with high fractional bandwidth (FBW) (103.16%), broad upper stopband (3.47 GHz), etc. together establish the proposed filter, suitable for practical UWB applications. The uniqueness of this design lies in the flexibility to configure the filter as either a double-notched or a triple-notched bandpass filter by altering only the aspect ratios of elliptical SRR. Simulated filter characteristics are compared with the results obtained by measuring the fabricated prototype, and a good accordance between the compared outcomes validates the design pertinence well.

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Section: Introductionmentioning

confidence: 99%

Design of a Miniaturized Split-ring Resonator Based UWB Notched Bandpass Filter

Chakraborty¹,

Panda²,

Deb³

et al. 2023

PIER C

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“…Consequently, to achieve these UWB technology comes into existence, which offers high speed communications in consumptions of low power [6]. Similarly, for achieving high frequency selectivity in UWB systems BPFs play an important role by rejecting unwanted frequencies and improving the system performances [7,8].…”

Section: Introductionmentioning

confidence: 99%

Band-stop Filtering for Electromagnetic Interference Rejection in Printed UWB Components Using Single Compact Archimedean Spiral EBG Cell

Modak¹,

Shome²,

Halimi³

et al. 2022

PIER C

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The design and analysis of a compact printed Archimedean spiral electromagnetic bandgap (EBG) structure are presented for frequency shielding in microwave circuits, including antenna and bandpass filters. The EBG characterization resonating at 7.7 GHz is done through a performance matrix such as transmission and reflection coefficients and equivalent circuit modeling, which demonstrates excellent resonance stability. The EBG unit cell is investigated for achieving frequency rejection in the printed monopole-based ultra-wideband (UWB) antenna and bandpass filter circuits. By introducing the Archimedean EBG unit cell on the UWB antenna ground plane, dual-frequency rejection, at 7.4, and 7.7 GHz, was realized. Further, such a structure is utilized in a multi-mode resonator (MMR) based UWB bandpass filter to attain band-notched functionality at 7.6 and 7.8 GHz with maximum attenuation of −16.5 and −15.6 dB, respectively. The prototypes of the EBG-loaded UWB antenna and EBG-Loaded UWB filter are fabricated and characterized. Excellent agreement is achieved between simulated and measured results of both prototypes.

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