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http://dx.doi.org/10.5515/KJKIEES.2007.18.7.828

A Small Monopole Antenna with Novel Impedance Matching Structure  

Kim, Dong-Jin (Department of Radio Sciences and Engineering, Korea Maritime University)
Min, Kyeong-Sik (Department of Radio Sciences and Engineering, Korea Maritime University)
Publication Information
The Journal of Korean Institute of Electromagnetic Engineering and Science / v.18, no.7, 2007 , pp. 828-833 More about this Journal
Abstract
A small monopole antenna with a novel impedance matching structure is proposed in this paper. The proposed antenna is designed for W-LAN(IEEE 802.11b). The antenna design concept is based on a ${\lambda}/8$ folded monopole antenna with a self-impedance matching structure. The size of the proposed antenna is smaller than the resonant length, thus the impedance at the terminal of the antenna becomes very capacitive. To compensate fur this impedance mismatching, the proposed antenna employs a novel self-impedance matching structure. The self-impedance matching structure is located on the top of the antenna; it improves the impedance matching and ultimately the efficiency of the antenna. The measured results of the proposed antenna show reasonable agreement with prediction.
Keywords
Self-Impedance Matching Antenna; Capacitive Monopole Element; Inductive Matching Line; Broad Bandwidth Antenna; Wheeler-Cap Method;
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