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Compact loop-coupled spiral antenna for multiband wireless USB dongles

Compact loop-coupled spiral antenna for multiband wireless USB dongles

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A compact spiral antenna with a loop element for wireless USB dongle devices is proposed. The proposed loop-coupled spiral antenna covers the WiBro, Bluetooth, WLAN, WiMAX and satellite digital multimedia broadcast (S-DMB) bands. The overall dimensions of the fabricated antenna are 10×50×1 mm, which is the most compact dimension among multiband USB dongle antennas reported to date. The measured −10 dB reflection bandwidths for two resonant frequencies are 19.0% (2.29–2.77 GHz) and 27.6% (4.55–6.01 GHz). The measured peak gain of the antenna is 3.92 dBi.

References

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      • Wikipedia, the free encyclopedia, http://en.wikipedia.org/wiki/Dongle.
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      • W.-S. Chen , K.-Y. Ku . A microstrip-fed monopole antenna for WLAN USB applications. Microw. J. , 3 , 104 - 107
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      • Ansoft High Frequency Structure Simulator (HFSS), ver. 10, www.ansoft.com.
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      • K.C. Hwang . Design and optimization of a broadband waveguide magic-T using a stepped conducting cone. IEEE Microw. Wirel. Compon. Lett. , 9 , 539 - 541
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