Ultrawideband Band-Notched Folded Strip Monopole Antenna

We propose a new band-notched folded strip monopole antenna for ultrawideband applications. This antenna is composed of a forked-shape radiator and a 50 Omega microstrip line. To achieve band-rejected filtering property at the WLAN bands, the forked-shape strips are folded back and result in a pair...

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Bibliographic Details
Published in:IEEE transactions on antennas and propagation 2007-09, Vol.55 (9), p.2473-2479
Main Authors: MA, Tzyh-Ghuang, WU, Sung-Jung
Format: Article
Language:English
Subjects:
Admittance
Antenna transient analysis
Antennas
Applied sciences
Business and industry local networks
Computer simulation
Coupling circuits
Equivalent circuits
Exact sciences and technology
Filtering
Frequency
Microstrip antennas
Monopole antennas
Networks and services in france and abroad
Radiators
Radiocommunications
Resonance
Strip
Telecommunications
Telecommunications and information theory
Teleprocessing networks. Isdn
Ultra wideband antennas
Ultra wideband technology
Ultrawideband
ultrawideband (UWB) antennas
Wireless communication
Wireless LAN
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Summary:We propose a new band-notched folded strip monopole antenna for ultrawideband applications. This antenna is composed of a forked-shape radiator and a 50 Omega microstrip line. To achieve band-rejected filtering property at the WLAN bands, the forked-shape strips are folded back and result in a pair of coupled lines on the radiator. The length and gap width of the coupled lines primarily determine the notched frequency of the antenna. Based on the band-notched resonance, an equivalent circuit model is proposed for the antenna and the calculated antenna input admittance agrees with the full-wave simulation data. With the help of the dimensionless normalized antenna transfer function, the radiation characteristics are investigated thoroughly. The transmission responses of a transceiving antenna system and their corresponding transient analysis are discussed at the end of this paper.
ISSN:0018-926X
1558-2221
DOI:10.1109/TAP.2007.904137