Design of Low-frequency Separation Structure for Ultra-wideband TEM Horn Antenna

XU Xiaomin; LIAO Cheng; CHEN Kaiya; ZHANG Min; FENG Ju

doi:10.11999/JEIT160049

Volume 38 Issue 11

Dec. 2016

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Article Navigation > Journal of Electronics & Information Technology > 2016 > 38(11): 2954-2959

XU Xiaomin, LIAO Cheng, CHEN Kaiya, ZHANG Min, FENG Ju. Design of Low-frequency Separation Structure for Ultra-wideband TEM Horn Antenna[J]. Journal of Electronics & Information Technology, 2016, 38(11): 2954-2959. doi: 10.11999/JEIT160049

Citation:

XU Xiaomin, LIAO Cheng, CHEN Kaiya, ZHANG Min, FENG Ju. Design of Low-frequency Separation Structure for Ultra-wideband TEM Horn Antenna[J]. Journal of Electronics & Information Technology, 2016, 38(11): 2954-2959. doi: 10.11999/JEIT160049

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Design of Low-frequency Separation Structure for Ultra-wideband TEM Horn Antenna

doi: 10.11999/JEIT160049

Funds:

The Joint Fund of the National Natural Science Foundation of China and the China Academy of Engineering Physics (NSAF U1330109), The Research Program of the Key Laboratory of High Power Microwave Technology (2014H01022), The Fundamental Research Funds for the Central Univevsities (2682015CX062)

Received Date: 2016-01-13
Rev Recd Date: 2016-06-08
Publish Date: 2016-11-19

Abstract

Abstract

In the design of ultra wideband TEM horn antenna, it is difficult to combine both the character optimization in low frequency and the miniaturization of an antenna, which always limits the usage of TEM horns in some applications. For the problem of low-frequency reflection, a structure, which is referred to the principle of band-pass filters in parallel and different from the conventional ones, is proposed in this paper for separating a fraction of low-frequency electric field component on the plates linking excitation port to radiation plates. It can greatly reduce the reflection of low-frequency component at the edge of radiation plates to improve the low frequency character of the antenna. In this paper, an ultra-wideband TEM horn antenna improved with the proposed structure is presented. Finally, the comparison of the improved antenna and the original one is exhibited, which shows that the impedance bandwidth is 12.5% wider with the low-cutoff frequency decreasing to 0.1 GHz and simultaneously the port-feed efficiency is increasing by 10%. The results confirm the validity of the proposed design to optimize the low frequency character. The feasibility is also validated in the end by analyzing the impedance and the magnitude distribution of currents in different frequencies, respectively.
- Antenna,
- TEM horn,
- Ultra-wideband,
- Low-frequency separation structure,
- Band-pass structure

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References(27)

References

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