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Progress In Electromagnetics Research
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BIDIRECTIONAL ULTRA-WIDEBAND ANTENNA USING RECTANGULAR RING FED BY STEPPED MONOPOLE

By S. Lamultree and C. Phongcharoenpanich

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Abstract:
This paper presents an ultra-wideband rectangular ring fed by stepped monopole antenna. The initial parameters of rectangular ring are first considered to obtain the bidirectional pattern with the desired resonant frequency. Subsequently, the parameters of stepped monopole for enhancing impedance bandwidth are investigated. To study the impedance and radiation behaviors, the simulations of the proposed antenna have been carried out. It is found that this antenna offers a bidirectional beam with the impedance bandwidth (return loss lower than -10 dB) covered the frequency range from 3.1 to 10.6 GHz. At the desired direction along this frequency band, the gain of 2.33-5.21 dBi is achieved. Furthermore, the prototype antenna was fabricated and measured to verify the simulated results. Obviously, the simulation and measurement are reasonably in good agreement.

Citation:
S. Lamultree and C. Phongcharoenpanich, "Bidirectional Ultra-Wideband Antenna Using Rectangular Ring Fed by Stepped Monopole," Progress In Electromagnetics Research, Vol. 85, 227-242, 2008.
doi:10.2528/PIER08080103
http://www.jpier.org/PIER/pier.php?paper=08080103

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