Single-Layer Substrate-Integrated Waveguide Inline Filters With Flexible Transmission Zeros

Zhu, Fang; Wu, Yunfei; Chu, Peng; Luo, Guo Qing; Wu, Ke

doi:10.1109/lmwc.2022.3141994

Cited by 13 publications

(3 citation statements)

References 25 publications

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“…Numerous miniaturization strategies for the SIW filters have been proposed [1]- [15]. The size can be decreased effectively by introducing multiple modes on a single resonant unit [1]- [5]. It is a common practice to move the low frequency modes to higher order modes to create a multi-pole or a multi-passband response.…”

Section: Introductionmentioning

confidence: 99%

Miniaturized, Wide Stopband Filter Based on Shielded Capacitively Loaded SIW Resonators

Zheng,

Tian,

Dong

2024

Chinese J. Elect.

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Based on the full-mode capacitively loaded substrate integrated waveguide (SIW) resonator and the miniaturized shielded half-mode capacitively loaded SIW (S-HMCSIW) cavities, a novel compact high-performance filter is proposed. The footprint of the half-mode SIW (HMSIW) is further reduced due to the application of the capacitive-loading technique. By applying cross coupling, the proposed SIW filter's transmission zero enhances the stopband rejection and shows excellent selectivity. For the bandpass filter, the measured |S 21 | and |S 11 | are better than 1.09 dB and −14 dB, respectively. And a 3-dB fractional bandwidth (FBW) of 9.14-10.76 GHz (FBW=16.2%) is also observed. The filter achieves a wide stopband with a −20 dB out-of-band rejection up to 2.69f 0 (f 0 = 10 GHz), with a size of 0.39λ g × 0.51λ g only. Good agreement between measurement and simulation is obtained.

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Section: Introductionmentioning

confidence: 99%

Miniaturized, Wide Stopband Filter Based on Shielded Capacitively Loaded SIW Resonators

Zheng,

Tian,

Dong

2024

Chinese J. Elect.

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“…Nevertheless, the MSIW will result in the increase of processing complexity and machining cost. Additionally, sub‐mode SIW techniques have been investigated in the BPF design [8–18], such as half‐mode SIW (HMSIW) [8–10], quarter‐mode SIW (QMSIW) [11–13], eighth‐mode SIW (EMSIW) [14–16] and sixteenth‐mode SIW (SMSIW) [17, 18]. The sub‐mode SIW cavity can be obtained by cutting the full‐mode SIW along its virtual magnetic walls (MWs).…”

Section: Introductionmentioning

confidence: 99%

“…design [8][9][10][11][12][13][14][15][16][17][18], such as half-mode SIW (HMSIW) [8][9][10], quarter-mode SIW (QMSIW) [11][12][13], eighth-mode SIW (EMSIW) [14][15][16] and sixteenth-mode SIW (SMSIW) [17,18]. The sub-mode SIW cavity can be obtained by cutting the fullmode SIW along its virtual magnetic walls (MWs).…”

mentioning

confidence: 99%

Compact hybrid eighth‐mode substrate integrated waveguide and microstrip line filters with mixed electric and magnetic coupling

Wang,

Liu,

Yang

et al. 2023

IET Microwaves Antenna & Prop

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This paper proposes a new type of hybrid eighth‐mode substrate integrated waveguide (EMSIW) and microstrip line (MSL) bandpass filter (BPF) with mixed electric and magnetic coupling. Firstly, two second‐order EMSIW BPFs with mixed coupling and wide stopband performance are investigated. Then, in order to realise high‐order BPF with decent performance, half‐wavelength (λ/2) open‐circuited MSL resonators are employed in the hybrid BPFs design. In the end, two third‐order BPFs and a fourth‐order BPF are developed by combining the EMSIW and MSL resonators together. Extra transmission zeros can be introduced due to the cross couplings in the trisection and quadruplet topologies. For demonstration, the proposed prototypes are designed, fabricated and measured. Reasonable agreements can be achieved between the measurement and simulation. The proposed third‐order BPFs compete against the state of the art, exhibiting the competitive characteristics of the operating bandwidth, physical footprint and upper‐stopband rejection with less order. The proposed fourth‐order BPF features a compact size of 0.34 × 0.34λ0, a low insertion loss of 1 dB, a broad 3‐dB fractional bandwidth of 22.9% and an excellent lower‐stopband suppression.

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A new electric coupling and its applications on millimeter-wave SIW filter with high selectivity and controllable TZs

Liu,

Chen,

et al. 2024

AEU - International Journal of Electronics and Communications

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Single-Layer Substrate-Integrated Waveguide Inline Filters With Flexible Transmission Zeros

Cited by 13 publications

References 25 publications

Miniaturized, Wide Stopband Filter Based on Shielded Capacitively Loaded SIW Resonators

Miniaturized, Wide Stopband Filter Based on Shielded Capacitively Loaded SIW Resonators

Compact hybrid eighth‐mode substrate integrated waveguide and microstrip line filters with mixed electric and magnetic coupling

A new electric coupling and its applications on millimeter-wave SIW filter with high selectivity and controllable TZs

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