volume | PIER Journals

2014-11-26

A Multiband Four-Antenna System for the Mobile Phones Applications

Jing-Li Guo,

Dr. Jing-Li Guo

Xidian University

China

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Bin Chen,

Dr. Bin Chen

National Laboratory of Antennas and Microwave Technology

Xidian University

China

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You-Huo Huang,

Dr. You-Huo Huang

Xidian University

China

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Hongwei Yuan

Dr. Hongwei Yuan

Guilin Changhai Company Limited

China

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Progress In Electromagnetics Research Letters, Vol. 50, 55-60, 2014

doi:10.2528/PIERL14092904 | Google Scholar

Abstract

A multiband four-antenna system with high isolation for the mobile phone applications is presented in this paper. The four antennas consisting of a main antenna and three auxiliary antennas are located on a 135×65×0.8 mm³ FR4 epoxy board. The main antenna is an improved monopole antenna which can cover LTE700/2300/2500, GSM850/900/1800/1900/UMTS, and 2.4-GHz WLAN bands. Three identical auxiliary antennas with a size of 40×6×0.8 mm³ are located vertically in the sides and bottom of the circuit board, respectively. By adopting three slots in each radiating patch of the auxiliary antennas, they can successfully cover 704-746 MHz and 1880-2690 MHz band with S₁₁ less than -6 dB. The isolation among the four antennas is better than 13 dB. The measured efficiency of the main antenna in the operation band can reach 40%, and the efficiency of auxiliary antennas can reach 25% at upper frequency band and about 10%-20% at 704-746 MHz band.

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Jing-Li Guo, Bin Chen, You-Huo Huang, and Hongwei Yuan, "A Multiband Four-Antenna System for the Mobile Phones Applications," Progress In Electromagnetics Research Letters, Vol. 50, 55-60, 2014.
doi:10.2528/PIERL14092904

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