volume | PIER Journals

Abstract

This study is designed mainly for dual band antennas of GSM/WiMAX operation in a wireless mobile communication device. This study proposes a matching technology for single path resonance in a basic monopole antenna running in dual-mode [1] and extends to a wide tuning range. The tuning of each frequency band is complicated under the constraint of the common path of dual-mode due to mutual interaction. This study proposes a refined process and new type of antennas for excellent dual-frequency matching. The incorporation of such a matching mechanism into a tuning monopole antenna enables the flexible operation bands. Moreover, the ground plane size can be shrunk to a reasonable size, and the details will be discussed in Section~6. As a result, antennas can achieve a tuning ratio of 1.6 (from 1825 to 2943 MHz). The total area of such a compact antenna including its ground can be effectively reduced to 0.018λ₀².

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10. Wong, K. L., S. C. Chen, and , "Printed single-strip monopole using a chip inductor for penta-band WWAN operation in the mobile phone," IEEE Trans. Antennas Propagat., Vol. 58, No. 3, , 1011-1014, , Mar. 2010..
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11. Jeong, , S. J., K. C. Hwang, and , "Compact loop-coupled spiral antenna for multiband wireless USB dongles," Electron. Lett., Vol. 46, No. 6, 388-390, Mar. 2008.
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12. Lee, , S. H., Y. Sung, and , "Multiband antenna for wireless USB dongle applications," IEEE Antenna Wireless Propag. Lett., Vol. 10, 25-28, 2011.

13. Zhang, , Y., Z. N. Chen, and M. Y. W. Chia, "Characteristics of planar dipoles printed on finite-size PCBs in UWB radio systems," IEEE Antennas and Propagation Society International Symposium (AP-S), , Jun. 2004.

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Dr. Chi-Lin Tsai

Dr. Chin-Lung Yang