Monocone Antenna with Short Elements on Wideband Choke Structure Using Composite Right/Left-Handed Coaxial Line

Kazuya MATSUBAYASHI
Naobumi MICHISHITA
Hisashi MORISHITA

Publication
IEICE TRANSACTIONS on Communications   Vol.E104-B    No.11    pp.1408-1418
Publication Date: 2021/11/01
Publicized: 2021/06/01
Online ISSN: 1745-1345
DOI: 10.1587/transcom.2020EBP3122
Type of Manuscript: PAPER
Category: Antennas and Propagation
Keyword: 
choke,  balun,  leakage current,  composite right/left-handed coaxial line,  

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Summary: 
The composite right/left-handed (CRLH) coaxial line (CL) with wideband electromagnetic band gap (EBG) is applied to the wideband choke structure for a monocone antenna with short elements, and the resulting characteristics are considered. In the proposed antenna, impedance matching and leakage current suppression can be achieved across a wideband off. The lowest frequency (|S11| ≤ -10dB) of the proposed antenna is about the same as that of the monocone antenna on an infinite ground plane. In addition, the radiation patterns of the proposed antenna are close to the figure of eight in wideband. The proposed antenna is prototyped, and the validity of the simulation is verified through measurement.