A dielectric-filled magnetically insulated transmission line oscillator

Fan, Yuwei; Wang, Xiaoyu; Zhong, Huihuang; Zhang, Jiande

doi:10.1063/1.4913932

Cited by 22 publications

(4 citation statements)

References 33 publications

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“…To identify the power-handling capacity of the leaky-wave antenna, high power experiments have been developed. The entire structure was studied on the HPM system of an L-band magnetically insulated transmission-line oscillator (MILO) [19], as shown in Fig. 17.…”

Section: B High Power Testmentioning

confidence: 99%

“…The slots at both ends are often tapered to suppress the reflected wave. However, the breakdown threshold of dielectric materials is very low [18], which is insufficient in HPM applications, where the output power of HPM source has reached GW class [19]. On the other hand, the slot length in high power cannot be too short in order to avoid electric field enhancement.…”

Section: Introductionmentioning

confidence: 99%

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An L-Band Leaky-Wave Array Antenna for High-Power Microwave Applications

Yuan

Zhang

et al. 2023

IEEE Trans. Antennas Propagat.

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This work seeks a novel design for a compact leaky-wave array antenna for high-power microwave (HPM) applications. The leaky-wave antenna is made of a rectangular waveguide with closely spaced non-resonant slots in the broad-wall of the waveguide. By this means, more slots can be set within a unit length and less energy will radiate from each slot, then higher power-handling capacity can be achieved. An L-band leaky-wave waveguide antenna centered at 1.57 GHz is designed and experimentally studied. The results show that the radiation efficiency of the antenna is 97% and the power-handling capacity of a single waveguide exceeds 1.3 GW. In addition, a 5-waveguide array antenna is also designed. The antenna array has an aperture efficiency of 76.6% and the beam scanning range can reach ±40° in H-plane, which would be suitable for many HPM applications.

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Section: B High Power Testmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

An L-Band Leaky-Wave Array Antenna for High-Power Microwave Applications

Yuan

Zhang

et al. 2023

IEEE Trans. Antennas Propagat.

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“…Of all the high power microwave sources, the magnetically insulated line oscillator (MILO) is considered as one of the most promising HPM devices, [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16] which has the advantages of high power, stable operation, no external magnetic field, compact structure, etc. However, the power efficiency of MILO is not so high because some intense electron beams are required to generate an insulating magnetic field.…”

Section: Introductionmentioning

confidence: 99%

A compact dual-band radiation system*

Yu¹,

Fan²,

Wang³

2020

Chinese Phys. B

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Complex magnetically insulated transmission line oscillator (MILO), as an important development direction, can enhance the power efficiency and generate dual-band high power microwaves (HPMs). A complex MILO and a preliminary dual-band radiation system have been proposed in our previous studies. However, the axial length of the dual-band radiation system is too long to meet the compact requirements. In this paper, a compact dual-band radiation system is presented and investigated numerically. The compact dual-band radiation system comprises a dual-band cross-shaped mode converter and a dual-band coaxial conical horn antenna. It can convert two coaxial TEM mode microwaves (1.717 GHz and 4.167 GHz) generated by the complex MILO into the coaxial TE11 mode microwaves, and then radiate them into the air. At 1.717 GHz, the gain of the antenna is 17.9 dB, and the total return loss and diffraction loss are 1.50% and 0, respectively. At 4.167 GHz, the gain is 19.4 dB, and the total return loss and diffraction loss are 1.17% and 0.78%, respectively. The power handling capacity of the antenna is 5.1 GW at 1.717 GHz and 2.0 GW at 4.167 GHz. Comparing with the original structure, the length of the dual-band radiation system is reduced by 45.2%.

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“…Compared with traditional microwave antennas, the difference in design of HPM antennas is mainly reflected in the output mode of the HPM source, the transmission mode of the feedline, and the power capacity. HPM sources (such as magnetically insulated wire oscillator, MILO [19]) couple the spin electron beam energy into radio frequency energy by means of the slow wave structure, so the output electromagnetic (EM) wave also works in rotationally symmetric mode, such as TM 0n and TEM mode. A cascaded mode converter is required to convert TM 0n or TEM mode into TE 11 mode that can achieve axial radiation.…”

Section: Introductionmentioning

confidence: 99%

Design of a Novel Compact Slotted Cavity With Shaped Beam for High Power Microwave Feed Antenna Using Asymmetric High Order Mode

Yang

et al. 2019

IEEE Access

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In order to achieve a shaped beam on a compact aperture and reduce the cost and the volume, a conformal slotted cavity as a feed antenna for high-power microwave using the asymmetric high-order mode is investigated. The proposed antenna working in a high-order mode has merits on reducing the complexity of a power network and the volume of a mode converter. The alternate arrangement of the slot array is taken into account, and the asymmetric high-order mode TE 430 is selected to improve the symmetry of far-field pattern at the E-plane. A novel design of wide slot with the horn-cavity etched on the top surface of the upper cavity achieves the uniform aperture field and mitigates the maximum electric field enhancement, and calculated results verify that the proposed antenna is capable of high-power handling capability (above 1.29 GW in vacuum). The conformal slot array is introduced to obtain a shaped beam, which helps to illuminate reflect array with shaped aperture efficiently. The simulation and measured results show that the feed antenna achieves a low-profile structure of 2.4λ 0 × 2.8λ 0 × 0.8λ 0 , the 10-dB gain beamwidth of E-plane is 56.6 • at the operating frequency of 9.1 GHz, the maximum difference of the gain, and the 10-dB beamwidth angle between the two sides of main beam is no more than 1 dB and 1 • , respectively. INDEX TERMS Asymmetric high order mode, shaped beam, compact feed antenna, conformal array, high power microwave, horn-cavity, power handling capability, slotted cavity.

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A dielectric-filled magnetically insulated transmission line oscillator

Cited by 22 publications

References 33 publications

An L-Band Leaky-Wave Array Antenna for High-Power Microwave Applications

An L-Band Leaky-Wave Array Antenna for High-Power Microwave Applications

A compact dual-band radiation system*

Design of a Novel Compact Slotted Cavity With Shaped Beam for High Power Microwave Feed Antenna Using Asymmetric High Order Mode

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