Antipodal Vivaldi Antenna; High Gain; Parasitic Antenna; Ultra-Wideband Antenna
Issue Date
2018-01
Publisher
KOREAN INST ELECTROMAGNETIC ENGINEERING & SCIENCE
Citation
JOURNAL OF ELECTROMAGNETIC ENGINEERING AND SCIENCE, v. 18, no. 1, page. 29-34
Abstract
An antipodal Vivaldi antenna with a compact parasitic patch to overcome radiation performance degradations in the high-frequency band is proposed. For this purpose, a double asymmetric trapezoidal parasitic patch is designed and added to the aperture of an antipodal Vivaldi antenna. The patch is designed to efficiently focus the beam toward the end-fire direction at high frequencies by utilizing field coupling between the main radiating patch and the inserted parasitic patch. As a result, this technique considerably improves the gain and stability of radiation patterns at high frequencies. The proposed antenna has a peak gain greater than 9 dBi over the frequency range of 626.5 GHz.