DocumentCode :
641849
Title :
Log-periodic slot antenna with modified cavity
Author :
Wei Wang ; Ying Liu ; Hao Yi ; Jinyang Xue
Author_Institution :
Nat. Lab. of Antennas & Microwave Technol., Xidian Univ., Xi´an, China
fYear :
2013
fDate :
14-16 April 2013
Firstpage :
1
Lastpage :
4
Abstract :
A cavity-backed log-periodic slot antenna which operates in 1-4.5GHz is presented. The antenna is fed by a special coplanar waveguide(CPW) that is gradual-changed and ultrawideband matched. Normal cavity is a high-Q resonator and will break the resonance of the antenna, especially at lower frequencies. A novel design of the cavity here is proposed to yield desired VSWR characteristics which is below 2.5 through the whole operation frequency band. The radiation patterns are unidirectional and quite stable within the band, which makes the antenna suitable for the applications in guidance, detection and UWB radar.
Keywords :
antenna feeds; antenna radiation patterns; coplanar waveguides; log periodic antennas; resonators; slot antennas; ultra wideband radar; CPW; LOG-periodic slot antenna; UWB radar; VSWR characteristics; cavity-backed log-periodic slot antenna; coplanar waveguide; frequency 1 GHz to 4.5 GHz; frequency band; high-Q resonator; modified cavity; normal cavity; unidirectional radiation patterns; CPW; Log-periodic slot antenna; cavity-backed; ultra-wideband radar;
fLanguage :
English
Publisher :
iet
Conference_Titel :
Radar Conference 2013, IET International
Conference_Location :
Xi´an
Electronic_ISBN :
978-1-84919-603-1
Type :
conf
DOI :
10.1049/cp.2013.0437
Filename :
6624601
Link To Document :
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