Compact and high‐performance UWB bandpass filter based on HMSIW

Huang, Lei; Yuan, Ye; Jiang, Yun; Yuan, Naichang

doi:10.1049/el.2020.1761

Cited by 3 publications

(1 citation statement)

References 6 publications

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“…The filter design demonstrated in [7][8][9][10][11] suffers from sharp selectivity. The design of filters depicted in [12][13][14][15][16][17][18] involves complex methods which require sophisticated procedures for achieving the narrow spacing between adjacent lines. For improving the selectivity of the structure, various methods are discussed in [19][20][21][22][23][24][25].…”

Section: Introductionmentioning

confidence: 99%

Staired-Slitted Flag Central Resonator Based Wide Band Bandpass Filter for Super Spurious Harmonic Suppressions

Iqubal¹,

Abdulla²

2021

PIER C

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A novel staired-slitted flag central resonator based wide band bandpass filter with sharp selectivity and super spurious harmonic suppression is proposed in this paper. Input-output ports based on three line edge coupling with ground plane aperture cutting contribute to the rejection of harmonics in the lower stopband. The spurious harmonic at the upper stopband is rejected with the help of embedded open stub suppression cells. The generation of two transmission zeros at the lower and upper cut-off frequencies are due to the staired slitted-flag main resonator, which contributes to the better selectivity of the filter, and it is verified with the help of mathematical equations. The fractional bandwidth of the developed filter is 107.2% with 7.82 GHz centre frequency. This work demonstrates the design, theory, and implementation aspects for the realization of bandpass filters with sharp selectivity and very good spurious suppression.

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Section: Introductionmentioning

confidence: 99%

Staired-Slitted Flag Central Resonator Based Wide Band Bandpass Filter for Super Spurious Harmonic Suppressions

Iqubal¹,

Abdulla²

2021

PIER C

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A miniaturized UWB bandpass filter with tunable cut-off frequencies employing rectangular open-loop defected ground structure

Verma

Sahu

Gupta

2023

Int. J. Microw. Wireless Technol.

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This article presents a compact rectangular impedance resonator (RIR)–based ultra-wideband bandpass filter with an improved reflection coefficient within the passband and controllable cut-off frequencies. The proposed filter consists of anti-parallel coupled RIR coupled with rectangular open-loop defected ground structure (ROL-DGS) etched on the ground plane. The ROL-DGS ensures better in-band and out-off-band characteristics with reduced size due to its high Q-factor. The short- and open-circuit stubs control the lower (fCL) and upper (fCU) 3-dB cut-off frequencies, respectively, by originating transmission zeros independently with the help of variations in design parameters. As a result, the filter having a compact size of 0.216λCL × 0.176λCL is achieved, where λCL is the corresponding guided wavelength at the lower cut-off frequency fCL of 2.95 GHz. Further, an equivalent circuit is also modeled to explain the working of the proposed filter, and equivalent lumped parameters were extracted. Simulated results reveal that the reported filter passes the frequencies effectively within 2.95–11.44 GHz with fractional bandwidth of 117.9%. The simulated insertion loss values within the passband are less than 1.17 dB, and the reflection coefficient is better than −19.6 dB. Further, the proposed filter is fabricated, and it was found that the measured and simulation results are in well agreement.

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