Influences of impedance characteristics of radiating antenna on output pulse of switched oscillators

Wang Yuwei; Chen Dongqun; Zhang Jiande; Cao Shengguang; Li Da; Liu Chebo

doi:10.3788/HPLPB20132507.1736

Volume 25 Issue 07

May 2013

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Article Navigation > High Power Laser and Particle Beams > 2013 > 25(07): 1736-1740

Xu Gang, Xie Ping, Liao Yong, et al. Frequency response of switched high power mesoband electromagnetic pulse generator[J]. High Power Laser and Particle Beams, 2013, 25: 2363-2367. doi: 10.3788/HPLPB20132509.2363

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Wang Yuwei, Chen Dongqun, Zhang Jiande, et al. Influences of impedance characteristics of radiating antenna on output pulse of switched oscillators[J]. High Power Laser and Particle Beams, 2013, 25: 1736-1740. doi: 10.3788/HPLPB20132507.1736

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Influences of impedance characteristics of radiating antenna on output pulse of switched oscillators

doi: 10.3788/HPLPB20132507.1736

1.
College of Opto-electric Science and Engineering,National University of Defense Technology,Changsha 410073,China

Received Date: 2012-11-09
Rev Recd Date: 2012-12-21
Publish Date: 2013-05-02

Abstract

Abstract

The oscillating voltage signal on the antenna terminal and the electric field at far-field district are analyzed by equivalent circuit and commercial electromagnetic software, respectively, taking monocone and helical antennas for examples. It is demonstrated that the center frequencies of the generated electromagnetic pulses coincide with the characteristic frequency of the switched oscillator adopting either element antenna with the same electrical length as the switched oscillator (electrical length matched) or traveling wave antenna. However, there are some differences between them. For an element antenna (electrical length matched), the duration of the output pulse is relatively short with low Q value and the energy disperses in a relatively wide band in frequency domain. On the contrary, the duration of the output pulse is relatively long with high Q value and the energy concentrates on a relatively narrow band in frequency domain for element antenna. This result helps to understand the generation of high power electromagnetic pulse utilizing switched oscillator and has practical significance to the antenna choice in different application occasions.
- wideband electromagnetic pulse,
- switched oscillator,
- element antenna,
- traveling wave antenna

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