DocumentCode :
1782522
Title :
Improvement of folded dipoles based on a branch current distribution
Author :
Xu Xie ; Huaning Wu ; Yu Zhao
Author_Institution :
Dept. of Electron. Eng., Naval Univ. of Eng., Wuhan, China
fYear :
2014
fDate :
8-11 July 2014
Firstpage :
511
Lastpage :
515
Abstract :
Folded dipoles are typically used as elements in curtain arrays due to their high input impedance, but under this configuration, the bandwidth of the curtain array in antenna mode is limited. This paper proposes an improved folded dipole based on a branch model, which effectively increases the bandwidth of the input impedance and decreases the VSWR(Voltage Standing-Wave Ratio) by selecting appropriate branch conductor positions. The current distribution of the branch model exhibited an unbalanced condition as the branch conductors moved. To verify the proposed method, a practical model with a cage antenna was analyzed using the proposed method and FEKO. The results indicated that the bandwidth reaches a maximum when the factor kBP is between 0.4 and 0.5.
Keywords :
current distribution; dipole antenna arrays; VSWR; branch conductor positions; branch current distribution; cage antenna; curtain antenna array; folded dipoles; high input impedance; voltage standing-wave ratio; Bandwidth; Broadband antennas; Conductors; Current distribution; Dipole antennas; Impedance; Folded dipole; bandwidth; branch model; current distribution;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Ubiquitous and Future Networks (ICUFN), 2014 Sixth International Conf on
Conference_Location :
Shanghai
Type :
conf
DOI :
10.1109/ICUFN.2014.6876846
Filename :
6876846
Link To Document :
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