Related Experiment Video
Updated: Jul 21, 2025

Simulation, Fabrication and Characterization of THz Metamaterial Absorbers
Published on: December 27, 2012
Ultra-Wideband and High-Gain Vivaldi Antenna with Artificial Electromagnetic Materials
Ruiyue Hu1,2,3, Feng Zhang1,2, Shengbo Ye1,2
1Aerospace Information Research Institute, Chinese Academy of Sciences, Beijing 100190, China.
Abstract:
An ultra-wideband and high-gain Vivaldi antenna with artificial electromagnetic material, suitable for ground-penetrating radar (GPR) systems, is proposed. Directors loaded inside the antenna gradient slot direct electromagnetic waves by inducing current to improve gain. The artificial electromagnetic material, also called metamaterial, is composed of multiple "H"-shaped units arranged in a certain regular pattern, loaded at the antenna aperture. The artificial electromagnetic units affect the antenna radiation waves by changing the refractive index to improve radiation directivity. The four Vivaldi units are arranged into a horn-shaped array, and each two units are orthogonally fed to realize dual polarization. Experimental results demonstrate that the antenna has good impedance matching of S11≤-10 dB in 0.9-4 GHz, and the maximum realized gain can reach 15.2 dBi.
Related Concept Videos
Standing Electromagnetic Waves
Suppose a sheet of a perfect conductor is placed in the yz-plane, and a linearly polarized electromagnetic wave traveling in the...
Generating Electromagnetic Radiations
Electromagnetic Waves
Electromagnetic Fields
However, the observation of...
Propagation Speed of Electromagnetic Waves
Magnetic Field Due To A Thin Straight Wire

