A compact two-way high-power microwave combiner

Chang, Chao; Sun, Jun; Xiong, Zhengfeng; Guo, Letian; Liu, Y. S.; Zhang, Z. Q.; Wu, Xiaolong

doi:10.1063/1.4891698

Cited by 20 publications

(3 citation statements)

References 22 publications

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“…In order to achieve improved radiation directionality, multichannel coupling, and enhanced space transmission, mode converters are commonly employed to convert high-order modes to the rectangular waveguide fundamental mode-TE10 which has a peak gain at the aperture in their radiation patterns and, hence, high propagation stability [4][5][6]. Several high-power radiation systems pump-in or pump-out radio frequency (RF) energy in the rectangular waveguide TE10 mode to achieve this [7][8][9], and the mode excitation of some antennas requires the rectangular waveguide TE10 mode. The rectangular waveguide TE10 mode itself has a relatively wide range of applications, including …., …, and ….. [ref,ref,ref].…”

Section: Introductionmentioning

confidence: 99%

Development of a Ka-Band Circular TM₀₁ to Rectangular TE₁₀ Mode Converter

Chen

Meng

Yang

et al. 2020

IEEE Trans. Electron Devices

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The output/input circuit is a core component in all high-power millimeterwave (MMW) radiation sources, and its performance specifications and reliability directly impact upon the performance of the radiation device. Central to achieving high output power is the development of efficient mode converters. Here we report on the development of , a compact ka-band circular waveguide TM01-rectangular waveguide TE10 mode converter. The present mode converter adopts an all-metal waveguide structure and facilitates notable improvement in the system power capacity and is capable of realizing high-power propagation. The mode converter realizes effective mode conversion between high-order and fundamental modes, as well as allowing longitudinal and transverse transmission. Our simulation and empirical findings have shown mode purity as high as 96% in the frequency range of 32.7 -34.6 GHzwith a return loss S11 < -19.3 dB. The bandwidth of the converter is 2.4 GHz with transmission coefficient S21 ≥ -1 dB. We anticipate these results will provide a strong foundation for the development of ever more sophisticated and high power, compact vacuum electron devices and advanced radiation sources.

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Section: Introductionmentioning

confidence: 99%

Development of a Ka-Band Circular TM₀₁ to Rectangular TE₁₀ Mode Converter

Chen

Meng

Yang

et al. 2020

IEEE Trans. Electron Devices

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“…Thus, in order to meet the growing demand for plasma applications, different requirements can be made for pulsed power sources [19][20][21][22][23][24][25]. The parameters of the pulsed power supply are closely related the gas-discharge devices.…”

Section: Introductionmentioning

confidence: 99%

A repetitive microsecond pulse generator for atmospheric pressure plasma jets

Zhang

Shao

Wang

et al. 2015

IEEE Trans. Dielect. Electr. Insul.

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Compared with other non-thermal plasma sources, the atmospheric-pressure plasma jet (APPJ) has advantages on simple structure, low temperatures, strong chemical activities, and convenient handling, all of which have attracted much attention. The power sources play an important role on the characteristics and the applications of the APPJ. In this article, a compact repetitive microsecond-pulse generator is designed for exciting the APPJ in helium and argon. The microsecond-pulse generator can produce repetitive pulses with output voltages of up to 20 kV, pulse width of ~8 s, and pulse repetition frequencies (PRFs) of 1 Hz ~2 kHz. Using the designed repetitive microsecond-pulse generator, the characteristics of the APPJ are investigated by measuring the voltages and currents and obtaining images of the discharges. Experimental results show that the microsecond-pulse generator has been successfully used to sustain stable APPJs both in helium and argon. The shape of the output voltage pulses may change as the applied voltage increases. Nevertheless, the output voltages are stable at all PRFs when the applied voltage is fixed. Furthermore, the effects of flow rate, the applied voltage, and the PRF on the He/Ar APPJ are investigated. Results show that it is more likely to generate a He APPJ rather than an Ar APPJ under microsecond-pulse excitation. The length of the plasma plume is slightly affected by the PRF both in the He APPJ and the Ar APPJ.Index Terms -Gas discharge, Non-thermal plasma, Microsecond pulse, Pulsed power, Atmospheric-pressure plasma jet (APPJ), Pulse repetition frequency (PRF).

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“…Therefore, we can make a power combiner of 100% efficiency if we let the two input fields have different wavelengths (i.e., the well-known wavelength-division-multiplexing technology, see, e.g., [4]), or have different polarizations (i.e., polarization multiplexing, see, e.g., [5]), or be of two modes orthogonal to each other (i.e., spatial mode multiplexing, see, e.g., [6]). Fig.…”

Section: Combination Through Different Channelsmentioning

confidence: 99%

On the Possibility of a Perfect Power Combiner

He¹,

Liu²

2017

PIER

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Abstract-By reductio ad absurdum, we show that a perfect power combiner of single-mode waveguides is impossible for incoherent input waves of the same frequency and same polarization as it is against the law of conservation of energy. The inevitable 3 dB loss of a three-port power combiner is explained physically. An incoherent power combiner of nearly 100% efficiency can be realized only if the two input fields have different wavelengths, have different polarizations, or are of orthogonal modes.

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A compact two-way high-power microwave combiner

Cited by 20 publications

References 22 publications

Development of a Ka-Band Circular TM₀₁ to Rectangular TE₁₀ Mode Converter

Development of a Ka-Band Circular TM₀₁ to Rectangular TE₁₀ Mode Converter

A repetitive microsecond pulse generator for atmospheric pressure plasma jets

On the Possibility of a Perfect Power Combiner

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A compact two-way high-power microwave combiner

Cited by 20 publications

References 22 publications

Development of a Ka-Band Circular TM01 to Rectangular TE10 Mode Converter

Development of a Ka-Band Circular TM01 to Rectangular TE10 Mode Converter

A repetitive microsecond pulse generator for atmospheric pressure plasma jets

On the Possibility of a Perfect Power Combiner

Contact Info

Product

Resources

About

Development of a Ka-Band Circular TM₀₁ to Rectangular TE₁₀ Mode Converter

Development of a Ka-Band Circular TM₀₁ to Rectangular TE₁₀ Mode Converter