An ultra wideband microstrip bandpass filter with wide stopband using SIR and DGS

Hussain, Intekhab; Das, Susmita; Tiary, M. G.

doi:10.1109/icmap.2018.8354646

Cited by 5 publications

(2 citation statements)

References 6 publications

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“…In Fig. 11, return loss, position of transmission poles (TP) and numbers of TPs are investigated by reflection coefficient (S11) which is given by equation ( 11) 4 ).tan(𝜃 𝑇𝑜𝑡𝑎𝑙 ) (11) Where 𝐽 ̅ = J/Yin and 𝐽 ̅ = J/Yout, J = admittance invertor factor, Yin and Yout are the input and output admittance respectively and Yin = Yout, θTotal = total electrical length of the resonator. Putting the value of first boundary condition, tan (θTotal) = 0, in equation ( 8) and ( 9), information about the frequency locations within the passband, where the transmission poles are occurred can be obtained.…”

Section: Resultsmentioning

confidence: 99%

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Miniaturized Ring Resonator Wideband Bandpass Filter with Wide Stop Band

Bhatt

Singh

2019

IJEEI

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In this paper a miniaturized quarter wavelength rectangular shaped multimode ring resonator bandpass filter with extended diagonal corners and internally located high impedance perturbation stubs is proposed. Input/output open stubs are tightly coupled to the extended diagonal corners running parallel to the two opposite sides of the ring resonator, generate wide passband and wide stop-band. Cut-off frequencies can be shifted to the higher side by increasing the length of the sides of the resonator. By inserting the perturbation stubs, rectangular ring resonator produces three degenerate modes out of which first two form a wide passband. Small square patch is attached to the opposite interior corners of the ring resonator to improve the return loss. T-shaped stub is tightly coupled between the feeder line and longer side of the resonator to improve the insertion loss and skirt-characteristics. Shorter opposite sides of the rectangular ring resonator are bent in U-shaped to increase the effective electrical length of the resonator eventually the bandwidth is widened. Filter is designed and simulated for the center frequency of 3.2 GHz, bandwidth from 2.0 GHz to 4.0 GHz, on dielectric constant 3.38 and thickness 0.508 mm. Electromagnetic simulator Ansoft HFSS is used to optimize the filter dimensions.

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Section: Resultsmentioning

confidence: 99%

“…By introducing the DGSs the filter size is reduced. Arrow coupled lines and U-slot defected ground structures (U-DGS) is proposed and succeeded to reduce the size [11][12][13]. T-shaped resonator filter is proposed for ultra-wideband bandpass filter.…”

Section: Introductionmentioning

confidence: 99%

Miniaturized Ring Resonator Wideband Bandpass Filter with Wide Stop Band

Bhatt

Singh

2019

IJEEI

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Multilayer UWB bandpass filter using liquid crystal polymer technology

Aliqab

2024

Sci Rep

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This proposed design presents a novel bandpass filter employing a Marchand balun to attain ultra-wideband (UWB) performance extending from 3.1 to 10.7 GHz with 6.8 GHz central frequency and 110% FBW. The UWB bandpass filter’s fractional bandwidth can be tailored owing to the diverse input/output impedances of the planar Marchand balun. This adaptability is accomplished by connecting two planar Marchand baluns consecutively, leveraging the concepts of transversal filter ideas and multilayer LCP technology resulting in 0.3 dB and 12 dB insertion and return losses respectively. In-depth guidelines for the formulation and synthesis of the UWB bandpass filter are incorporated.

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