DocumentCode
1766005
Title
Double-slot Vivaldi antenna with improved gain
Author
Wang, Y.W. ; Wang, G.M. ; Gao, X.J. ; Zhou, Changle
Author_Institution
Air-Defense & Antimissile Inst., Air Force Eng. Univ., Xi´an, China
Volume
49
Issue
18
fYear
2013
fDate
August 29 2013
Firstpage
1119
Lastpage
1121
Abstract
A double-slot structure is proposed to design a new Vivaldi antenna with improved gain. The two slots are excited in uniform amplitude and phase by using a T-junction power divider. The double-slot structure can generate plane-like waves across the slot aperture of the antenna. As a result, the gain of the double-slot Vivaldi antenna is significantly improved compared with that of a typical Vivaldi antenna of the same size. The measured results show that the impedance bandwidth of the double-slot Vivaldi antenna is from 2.5 to 15 GHz. The gain of the proposed antenna is considerably higher than the typical antenna at frequencies above 6 GHz. What is more, the structure proposed is far simpler than those designed before.
Keywords
aperture antennas; microwave antennas; slot antennas; T-junction power divider; bandwidth 2.5 GHz to 15 GHz; double-slot Vivaldi antenna stucture; impedance bandwidth; improved gain; plane-like waves; slot aperture; uniform amplitude;
fLanguage
English
Journal_Title
Electronics Letters
Publisher
iet
ISSN
0013-5194
Type
jour
DOI
10.1049/el.2013.2180
Filename
6587632
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