Linear theory of beam–wave interaction in double-slot coupled cavity travelling wave tube

He, Fei; Xie, Wenqiu; Luo, Jirun; Zhu, Min; Guo, Wei

doi:10.1088/1674-1056/25/3/038401

Cited by 3 publications

(1 citation statement)

References 8 publications

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“…Leaky-wave antenna (LWA) possesses many advantages such as low profile, beam scanning, and consistent gains. However, for the conventional uniform LWA, it can radiate only in a forward direction, [12,13] but the metamaterial based one can realize a continuous beam scanning property from backward to broadside to forward directions within its operating frequency band. [14] The previously reported SIW/HMSIW based LWA used metamaterial structure to realize continuous beam scanning from backward to forward directions.…”

Section: Introductionmentioning

confidence: 99%

Metamaterial beam scanning leaky-wave antenna based on quarter mode substrate integrated waveguide structure

Wang

et al. 2017

Chinese Phys. B

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In this paper, we first propose a metamaterial structure by etching the same two interdigital fingers on the upper ground of quarter mode substrate integrated waveguide (QMSIW). The simulated results show that the proposed QMSIWbased metamaterial has a continuous phase constant changing from negative to positive values within its passband. A periodic leaky-wave antenna (LWA), which consists of 11 QMSIW-based metamaterial unit cells, is designed, fabricated, and measured. The measured results show that the fabricated antenna achieves a continuous beam scanning property from backward −43 • to forward +32 • over an operating frequencyrange of 8.9 GHz-11.8 GHz with return loss better than 10 dB. The measured antenna gain keeps consistent with the variation of less than 2 dB over the operating frequency range with a maximum gain of 12 dB. Besides, the measured and simulated results are in good agreement with each other, indicating the significance and effectiveness of this method.

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Section: Introductionmentioning

confidence: 99%

Metamaterial beam scanning leaky-wave antenna based on quarter mode substrate integrated waveguide structure

Wang

et al. 2017

Chinese Phys. B

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Electromagnetic coupling reduction in dual-band microstrip antenna array using ultra-compact single-negative electric metamaterials for MIMO application

Bai

et al. 2017

Chinese Phys. B

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In this paper, an ultra-compact single negative (SNG) electric waveguided metamaterial (WG-MTM) is first investigated and used to reduce the mutual coupling in E & H planes of a dual-band microstrip antenna array. The proposed SNG electric WG-MTM unit cell is designed by etching two different symmetrical spiral lines on the ground, and has two stopbands operating at 1.86 GHz and 2.40 GHz. The circuit size is very compact, which is only λ 0 /33.6 × λ 0 /15.1 (where λ 0 is the wavelength at 1.86 GHz in free space). Taking advantage of the dual-stopband property of the proposed SNG electric WG-MTM, a dual-band microstrip antenna array operating at 1.86 GHz and 2.40 GHz with very low mutual coupling is designed by embedding a cross shaped array of the proposed SNG electric WG-MTM. The measured and simulated results of the designed dual-band antenna array are in good agreement with each other, indicating that the mutual coupling of the fabricated dual-band antenna array realizes 9.8/11.1 dB reductions in the H plane, 8.5/7.9 dB reductions in the E plane at 1.86 GHz and 2.40 GHz, respectively. Besides, the distance of the antenna elements in the array is only 0.35λ 0 (where λ 0 is the wavelength at 1.86 GHz in free space). The proposed strategy is used for the first time to reduce the mutual coupling in E & H planes of the dual-band microstrip antenna array by using ultra-compact SNG electric WG-MTM.

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A Three-Dimensional Model of Beam-Wave Interaction in a Coupled-Cavity TWT

Wang

Fan

Wang

et al. 2019

2019 International Vacuum Electronics Conference (IVEC)

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Linear theory of beam–wave interaction in double-slot coupled cavity travelling wave tube

Cited by 3 publications

References 8 publications

Metamaterial beam scanning leaky-wave antenna based on quarter mode substrate integrated waveguide structure

Metamaterial beam scanning leaky-wave antenna based on quarter mode substrate integrated waveguide structure

Electromagnetic coupling reduction in dual-band microstrip antenna array using ultra-compact single-negative electric metamaterials for MIMO application

A Three-Dimensional Model of Beam-Wave Interaction in a Coupled-Cavity TWT

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