volume | PIER Journals

2010-10-25

Dual-Wideband Box-Shaped Antenna with a U-Shaped Slot

Li Jin,

Dr. Li Jin

Xidian University

China

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Xiao-Miao Zhang,

Dr. Xiao-Miao Zhang

National Key Laboratory of Antennas and Microwave Technology

Xidian University

China

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Zhen Zhang,

Dr. Zhen Zhang

Xidian University

China

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Rui Guan,

Ms. Rui Guan

Xidian University

China

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Bo Yang

Dr. Bo Yang

Xidian University

China

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Progress In Electromagnetics Research Letters, Vol. 18, 105-113, 2010

doi:10.2528/PIERL10082405

Abstract

In this paper, a study on the dual-frequency box-shaped antenna is presented. With a 5-branch feeding strip and two plates of shorting strips, the antenna shows broadband and compact property. Then a U-shaped slot is etched for dual-band operation. Simulated and measured results all show that this antenna exhibits dual-wideband characteristic, covering several present wireless communication systems, such as GSM800/900 (824--960 MHz), WLAN11b (2.4--2.5 GHz), WiMax802.16 (2.5--2.7 GHz), and Bluetooth band (2.4--2.8 GHz). The simulated impedance bandwidth (2:1 VSWR) is 21.5% and 37.2% in the lower and higher band, ranging from 790MHz-980MHz and 2.3 GHz--3.35 GHz. Then details of the antenna are described and the prototype is fabricated and tested. A measured bandwidth of 19.8% and 38.9% in the two bands, ranging from 820 MHz--1000 MHz and 2.28 GHz--3.38 GHz, is observed, shown good agreement with simulated results. Moreover, the antenna has a coaxial feed with a compact size of 0.27λ×0.22λ×0.036λ (λ is the wavelength referenced to the lowest edge of the operating band 820 MHz).

Citation

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Li Jin, Xiao-Miao Zhang, Zhen Zhang, Rui Guan, and Bo Yang, "Dual-Wideband Box-Shaped Antenna with a U-Shaped Slot," Progress In Electromagnetics Research Letters, Vol. 18, 105-113, 2010.
doi:10.2528/PIERL10082405

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