Reconfigurable bandpass filter topology using cul-de-sac resonators with adjustable notches

Nam, Seunggoo; Lee, Bo-Young; Lee, Juseop

doi:10.1109/mwsym.2016.7539985

Cited by 4 publications

(3 citation statements)

References 11 publications

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“…In addition, multiple methods are proposed to independently control the CFs of the 1st and 2nd passbands compared to the referred methods in [15, 17, 19, 22, 23, 26-29, 31, 32, 35]. The filter response shows enhanced passband selectivity with six TZs throughout its frequency response compared to [15,17,19,22,23,[26][27][28][29][30][31][32]35]. Relatively wider FBWs at lower operating frequencies are attained at all three passbands in this CF controlling technique with respect to other referred works operating at higher center frequencies [15, 22, 27, 28 31].…”

Section: Control Over 3rd Passbandmentioning

confidence: 99%

“…Electric tuning elements are mostly preferred by researchers, due to their operational ease with controlling voltage used to control the CFs of multiple bandpass filters. Surface mount capacitors, stub capacitors, lumped capacitors, and piezoelectric actuators are some fascinating electric tuning elements used to control the CFs of the passbands [17][18][19][20][21][22][23][24][25][26][27]. The criticality of these tunable bandpass filters lies in the implementation of their electric tuning elements which are sometimes quite complex and hard to operate [17,19,22,23,26,27].…”

Section: Introductionmentioning

confidence: 99%

“…Surface mount capacitors, stub capacitors, lumped capacitors, and piezoelectric actuators are some fascinating electric tuning elements used to control the CFs of the passbands [17][18][19][20][21][22][23][24][25][26][27]. The criticality of these tunable bandpass filters lies in the implementation of their electric tuning elements which are sometimes quite complex and hard to operate [17,19,22,23,26,27]. The passbands of multiple bandpass filters mostly suffer high insertion losses when the CFs are controlled by electrical tuning elements [17,18,20,22,27].…”

Section: Introductionmentioning

confidence: 99%

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Independent Control over Passbands in Highly Selective and Compact Triple-band Bandpass Filter Based on Substrate Integrated Waveguide

Chaudhury¹,

Awasthi²,

Singh³

2023

PIER B

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This paper proposes a method of independent control over each passband in a high performance triple bandpass filter, which is an essential requirement in the field of microwave communication systems. Individual techniques are presented here to control the excited modes that are responsible for the generation of triple passbands based on substrate integrated waveguide loaded with semi-circular mushroom resonators. Initially, a circular substrate integrated waveguide (CSIW) loaded with two cascaded semi-circular mushroom resonators (ScMRs) with distinct modifications and orientations in the schematic is employed to generate three passbands. The fundamental mode and next higher order mode of the entire resonator structure are utilized to generate three passbands, and distinct techniques of mode perturbations and variation in coupling strength are introduced to independently control the excited modes. Subsequently, the methods established to control the excited modes are employed to independently control the center frequencies (CFs) of three passbands. All those methods established to control the CFs of the three passbands are verified with experimental results which show good agreement with the simulated ones.

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Section: Control Over 3rd Passbandmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Independent Control over Passbands in Highly Selective and Compact Triple-band Bandpass Filter Based on Substrate Integrated Waveguide

Chaudhury¹,

Awasthi²,

Singh³

2023

PIER B

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Practical Design and Implementation Method for Asymmetric-Response Post-Loaded Substrate-Integrated Waveguide Filters

2020

Self Cite

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This paper presents a practical method for implementing a post-loaded substrate-integrated waveguide (SIW) filter producing an asymmetric response with a pair of near-band transmission zeros. More specifically, we present a practical frequency-dependent coupling structure for post-loaded SIW resonators for implementing an asymmetric response. By virtue of the proposed coupling design methods, the roll-offs in the upper and lower stopbands can be readily controlled to be different from each other. In other words, the roll-off in a stopband can be made to be steeper than the one in the other stopband by means of using the proposed design method for coupling structure. More importantly, we propose a useful approach to swap the two stopband responses of an asymmetric-response filter. In other word, this paper shows a practical method to laterally reverse an asymmetric response. For demonstration, 1 symmetric-response and 2 asymmetricresponse fourth-order SIW filters have been designed using the presented frequency-dependent coupling structures.

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Reconfigurable Bandpass Filter With Resonators in Cul-De-Sacs for Producing Notches

Nam

Lee

Koh

et al. 2017

IEEE Trans. Compon., Packag. Manufact. Technol.

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Reconfigurable bandpass filter topology using cul-de-sac resonators with adjustable notches

Cited by 4 publications

References 11 publications

Independent Control over Passbands in Highly Selective and Compact Triple-band Bandpass Filter Based on Substrate Integrated Waveguide

Independent Control over Passbands in Highly Selective and Compact Triple-band Bandpass Filter Based on Substrate Integrated Waveguide

Practical Design and Implementation Method for Asymmetric-Response Post-Loaded Substrate-Integrated Waveguide Filters

Reconfigurable Bandpass Filter With Resonators in Cul-De-Sacs for Producing Notches

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