A compact double folded quarter mode substrate integrated waveguide (DFQMSIW) filter

Zhu, Yongzhong

doi:10.1587/elex.13.20160330

Cited by 11 publications

(7 citation statements)

References 14 publications

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“…Compact substrate integrated waveguide (SIW) filters with high performance have been attracted a lot of attention to be designed and applied in the modern communication systems [1,2,3,4,5,6,7]. And some methods have been proposed to design size-reduced SIW filters to satisfy the demand.…”

Section: Introductionmentioning

confidence: 99%

A quasi-elliptic response triple-mode SIW bandpass filter with controllable transmission zeros

Liu

Yang³

2019

IEICE Electron. Express

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This letter reports a novel quasi-elliptic bandpass filter (BPF) using a new triple-mode circle-shaped substrate integrated waveguide (SIW) cavity. The triple-mode SIW cavity is achieved by a dual-mode circle-shaped SIW cavity with a floating capacitive-loaded metallic patch. The resonance of one higher-order mode is independently shifted to that of dual modes to form a three-pole passband. Three finite transmission zeros (FTZs) can be produced, and two of them can be controlled well by the angle between two feeding lines. For the demonstration, a prototype filter was designed, fabricated and measured. Good agreement between measured results and simulated results is observed. The proposed triple-mode SIW filter has the merits of compact size, high selectivity and controllable bandwidth as well as FTZs.

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Section: Introductionmentioning

confidence: 99%

A quasi-elliptic response triple-mode SIW bandpass filter with controllable transmission zeros

Liu

Yang³

2019

IEICE Electron. Express

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“…It has the advantages of high Q value and low loss of traditional waveguide and small size of microstrip structure [12,13,14]. In the field of miniaturization, half mode, 1/4 modes, 1/8 modes, and multilayer folding techniques have been introduced [15,16,17,18], which greatly reduce the size of the filter. Some achievements have also been made in the tunable aspect of SIW filter: In [19], The frequency and bandwidth can be adjusted by using electric element and magnetic ferrite on the basis of half-mode substrate integrated waveguide.…”

Section: Introductionmentioning

confidence: 99%

A high stability fully tunable filter with frequency, bandwidth and transmission zero tuning

Zhang

Zhu

Meng

et al. 2019

IEICE Electron. Express

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Based on the double folded 1/4 mode substrate integrated waveguide (DFQMSIW) resonator, a two-pole DFQMSIW tunable filter with frequency, bandwidth and transmission zeros tuning is proposed in this paper. In order to increase the stability of the filter, the constant bandwidth can be maintained by changing the coupling coefficient by two varactor diodes when tuning frequency and transmission zeros. The center frequency can be tuned in the range of 1.1 GHz-1.9 GHz, transmission zeros can be tuned from 1.41 GHz to 1.5 GHz with bandwidth unchanged, and bandwidth can be tuned from 120 MHz to 200 MHz. The insertion loss is about −1.3 dB to −3 dB.

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“…Based on the previous research on miniaturized substrate integrated waveguide microwave filters, this paper analyzes the equivalent circuit and resonance characteristics of a resonant cavity by using a miniaturized substrate integrated waveguide resonator [10]. On this basis, a high-performance fully tunable microwave filter with tunable CF, ABW, and TZ is designed and fabricated by using the method of odd-even mode analysis.…”

Section: Introductionmentioning

confidence: 99%

A Novel Three-Parameter Fully Tunable Bp Filter

Zuo¹,

Zhu²,

Li³

et al. 2019

PIER Letters

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The research and development of microwave-tunable equipment has promoted the advancement of electronic countermeasures and electronic surveillance in the field of military communications. The research of fully tunable filters is a hotspot in the field of tunable filter research. Parameters such as center frequency (CF), absolute bandwidth (ABW), and transmission zero (TZ) are important indicators of fully tunable filters. In this paper, a high-performance fully tunable substrate integrated waveguide filter is designed and fabricated to achieve constant ABW (100 MHz) and TZ (1.59 GHz) with CF tunable, and the adjustable range is 1.1-1.3 GHz. Meanwhile, the constant CF (1.15 GHz) is achieved with the ABW tunable, and the adjustable range is 70-120 MHz. Also the constant ABW (100 MHz) and CF (1.14 GHz) are achieved with the TZ tunable, and the adjustable range is 1.59-1.89 GHz. The measured results show that the insertion loss of the tunable filter is lower than 2.04 dB, and the return loss is greater than 20 dB.

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A compact double folded quarter mode substrate integrated waveguide (DFQMSIW) filter

Cited by 11 publications

References 14 publications

A quasi-elliptic response triple-mode SIW bandpass filter with controllable transmission zeros

A quasi-elliptic response triple-mode SIW bandpass filter with controllable transmission zeros

A high stability fully tunable filter with frequency, bandwidth and transmission zero tuning

A Novel Three-Parameter Fully Tunable Bp Filter

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