Design of UWB Electrically Small Antenna Based on Distributed Passive Network Loading

Author:

Chen Zhe1,Lin Xianqi2,Luan Yuchen3,Hao Xinjie2,Yan Xiaoming2,Liu Guo4

Affiliation:

1. Yangtze Delta Region Institute (Huzhou), University of Electronic Science and Technology of China, Huzhou 313000, China

2. School of Electronic Science and Engineering, University of Electronic Science and Technology of China, Chengdu 611731, China

3. National Key Laboratory of Microwave Imaging Technology, Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing 100190, China

4. Science and Technology on Electronic Information Control Laboratory, Chengdu 610036, China

Abstract

In this paper, an ultra-wideband electrically small antenna based on distributed passive network loading is proposed. Based on the Vivaldi antenna theory, magnetic dipole antenna theory, and distributed loading theory, the electrically small antenna achieves the purpose of being wideband using a three-dimensional design of a planar Vivaldi antenna structure under limited space constraints. At the same time, the magnetic dipole antenna is introduced to effectively expand the low-frequency bandwidth of the electrically small antenna without increasing the aperture size. Finally, through the distributed passive network loading, the wideband-conjugated matching of the electrically small antenna is achieved without increasing the size of the electrically small antenna. The −6 dB bandwidth of the electrically small antenna is 0.2 GHz–3 GHz, and the overall size is 0.06 λ0 × 0.05 λ0 × 0.12 λ0, where λ0 is the wavelength of the lowest frequency of the antenna. One sample of the proposed UWB electrically small antenna is fabricated and tested. Good agreement between simulation results and measurement results are obtained. The design method of UWB electrically small antenna proposed in this paper can be applied to the base station antenna, low-frequency detection, microwave sensing, and microwave measurement.

Funder

National Natural Science Foundation of China

Scientific Research Foundation for Yangtze Delta Region Institute of University of Electronic Science and Technology of China, Huzhou

Publisher

MDPI AG

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1. Rapid construction of electrically small spherical and cylindrical antennas;e-Prime - Advances in Electrical Engineering, Electronics and Energy;2024-06

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