Compact Dual-Band Balanced SIW Bandpass Filter With Improved Common-Mode Suppression

Li, Peng; Chu, Hui; Zhao, Dan; Chen, R. S.

doi:10.1109/lmwc.2017.2678428

Cited by 82 publications

(62 citation statements)

References 8 publications

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“…The comparison table also shows that the proposed filter generates highly selective passband response due to generation of three transmission zeros, compared to the dual passband filters presented in References and maintains the passband selectivity almost similar to the filters proposed in References . The 3 dB fractional bandwidth of first passband is 12.5% and that of second passband is 10.5% which is quite wide compared to 3 dB FBW of other filters . The proposed dual bandpass filter undergoes a measured insertion loss of 1 and 1.8 dB in first and second passband, respectively, which is relatively less than those filters proposed in References and nearly similar to that of the other filters listed in Table .…”

Section: Resultsmentioning

confidence: 59%

“…The proposed dual‐band bandpass filter is a second order direct coupled filter with two passbands centered at a close difference of 1.9 GHz compared to other dual passbands having greater difference in center frequencies with orders of 2 and 3 . The comparison table also shows that the proposed filter generates highly selective passband response due to generation of three transmission zeros, compared to the dual passband filters presented in References and maintains the passband selectivity almost similar to the filters proposed in References . The 3 dB fractional bandwidth of first passband is 12.5% and that of second passband is 10.5% which is quite wide compared to 3 dB FBW of other filters .…”

Section: Resultsmentioning

confidence: 62%

“…A comparison of the proposed work with other types of dual passband filters is listed in Table I which shows the beneficial characteristics of the proposed filter compared to other dual passband filters. The proposed dual‐band bandpass filter is a second order direct coupled filter with two passbands centered at a close difference of 1.9 GHz compared to other dual passbands having greater difference in center frequencies with orders of 2 and 3 . The comparison table also shows that the proposed filter generates highly selective passband response due to generation of three transmission zeros, compared to the dual passband filters presented in References and maintains the passband selectivity almost similar to the filters proposed in References .…”

Section: Resultsmentioning

confidence: 63%

“…Mushroom structures are inserted inside dual layer printed circuit board bounded by SIW to generate multiple pole single passband with noticeable out of band rejection and high selectivity, although making the fabrication process unavoidably complex . Compact SIW cavities are proposed to generate dual bandpass filter by introducing perturbation vias, complementary split ring resonators (CSRRs) and perturbation slotlines into the cavity to control the individual passband although within limited range . These proposed structures generate passbands of asymmetric responses with transmission zero at one side of passband unless source load coupling is introduced to attain transmission zeros at both halves.…”

Section: Introductionmentioning

confidence: 99%

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Dual band bandpass filter based on substrate integrated waveguide loaded with mushroom resonators

Chaudhury

Awasthi

Singh

2020

Micro & Optical Tech Letters

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This article presents a dual band bandpass filter by loading two cascaded mushroom resonators inside the cavity of a rectangular substrate integrated waveguide (SIW). The passbands are generated by exciting TE101 and TE201 modes of dual mushroom structures loaded inside SIW cavity. The fundamental mode, that is, TE101 of the entire filter structure is utilized to create the first passband and the next higher order mode, that is, TE201 of the filter structure is employed for the generation of second passband. Due to the incorporation of mushroom resonators into SIW, which are composite right/left handed transmission lines, the anticipated frequency response represents highly selective passbands with three transmission zeros (TZs) and an improved out‐of‐band response beyond the second passband. The effects of some structural parameters of the filter on the control over coupling parameters (k101 and k201) and quality factor (Q) are studied. This modified SIW based dual bandpass filter is fabricated and measured to verify two passbands centered at 2.25 and 4.1 GHz with 12.9% and 10.8% fractional bandwidth (FBW) and minimum insertion loss of 0.86 dB and 1.6 dB, respectively. Mobile satellite communications, weather radar systems and Wi‐Fi technology are the actual fields where such bandpass filters can be thoroughly applied.

show abstract

Section: Resultsmentioning

confidence: 59%

Section: Resultsmentioning

confidence: 62%

Section: Resultsmentioning

confidence: 63%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Dual band bandpass filter based on substrate integrated waveguide loaded with mushroom resonators

Chaudhury

Awasthi

Singh

2020

Micro & Optical Tech Letters

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“…Recently, the scholars are interested in designing the balanced BPFs [13][14][15][16][17][18][19] with common-mode (CM) noise suppression in balanced circuits and systems. High immunity to environmental noise, interference, and crosstalk between different elements are the key advantages over their singleended counterparts.…”

Section: Introductionmentioning

confidence: 99%

Wideband varactor‐tuned balanced bandpass filter with stable passband selectivity

Zhang

Cai

Chen

2018

Int J RF Microw Comput Aided Eng

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This article presents a wideband tunable balanced bandpass filter (BPF) with stable passband selectivity using optimized varactor‐loaded half‐guided wavelength stepped impedance resonator (SIR). By overall investigation, it can be found that the frequency‐tuning range of the varactor‐loaded SIR is not only controlled by the variation range of the loaded capacitor, but it can be widened by optimizing the SIR. The coupling region between the two coupled SIRs in the proposed BPF is studied for achieving the constant absolute bandwidth (ABW) during the frequency‐tuning process. Meanwhile, the frequency‐dependent source‐to‐load coupling is introduced to realize two self‐adaptive transmission zeros (TZs) on both sides of the tunable differential‐mode (DM) passband so that the proposed filter can keep high selectivity. Benefiting from the constant ABW and two self‐adaptive TZs, the stable DM passband selectivity of the balanced tunable filter can be obtained. For demonstration, a balanced tunable BPF based on the optimized varactor‐loaded SIRs is designed, fabricated and measured. The simulated and measured results, showing good agreement, exhibit a tuning range from 0.542 GHz to 0.926 GHz with 3‐dB constant ABW of around 105 MHz and in‐band insertion loss of 1.5‐2.56 dB.

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SIW sext‐band bandpass filter based on split‐type triple‐band symmetrical frequency responses

Zhou

2018

Int J RF Microw Comput Aided Eng

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Substrate‐integrated waveguide (SIW) sext‐band bandpass filter (BPF) composed of two dual‐mode cavities coupled with multiple single‐mode ones is synthesized and designed for the first time by combining split‐type triple‐band symmetrical frequency responses for two virtual wide passbands dominated by TE101 and TE201 modes in SIW rectangular cavities. By applying our previously proposed dual‐mode frequency and coupling controlling techniques, the center frequencies and fractional bandwidths of the two virtual passbands can be allocated flexibly. An experimental prototype with the two virtual wide bands centered at 11.993 and 14.336 GHz is synthesized, designed, fabricated, and tested to demonstrate and validate the collaborative design concept, showing excellent agreement between the measured and simulation results.

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Compact Dual-Band Balanced SIW Bandpass Filter With Improved Common-Mode Suppression

Cited by 82 publications

References 8 publications

Dual band bandpass filter based on substrate integrated waveguide loaded with mushroom resonators

Dual band bandpass filter based on substrate integrated waveguide loaded with mushroom resonators

Wideband varactor‐tuned balanced bandpass filter with stable passband selectivity

SIW sext‐band bandpass filter based on split‐type triple‐band symmetrical frequency responses

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