High-Efficiency Crossed-Loop 4G LTE Antenna for All Display Metal-Rimmed Smartphones

A symmetrically crossed-loop antenna featuring very high radiation efficiency across the entire LTE frequency bands for metal-rimmed smartphones with only 2 mm ground clearance is proposed, analyzed, and verified. The employment of even and odd modes is utilized to achieve wide bandwidth across 698–...

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Bibliographic Details
Published in:International journal of antennas and propagation 2018-01, Vol.2018 (2018), p.1-7
Main Authors: Jung, Byungwoon, You, Chisang, Hwang, Woonbong, Choi, Jaehyun, Hong, Wonbin
Format: Article
Language:English
Subjects:
4G mobile communication
Bans
Cellular telephones
Current distribution
Design
Efficiency
Electric power distribution
Empirical analysis
Frequencies
Frequency spectrum
Ground plane
Mobile communication systems
Propagation
Radiation tolerance
Smartphones
Wireless communications
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Summary:A symmetrically crossed-loop antenna featuring very high radiation efficiency across the entire LTE frequency bands for metal-rimmed smartphones with only 2 mm ground clearance is proposed, analyzed, and verified. The employment of even and odd modes is utilized to achieve wide bandwidth across 698–960 MHz (low-frequency spectrum), 1710–2170 MHz (middle-frequency spectrum), and 2300–2690 MHz (high-frequency spectrum). Empirical analysis confirms the crossed-loop topology results in a 180° phase shift of the electric current distribution on the ground plane, resulting in enhancement of the radiation resistance. As a result, the devised LTE antenna exhibits more than 48% to 75% total system efficiency across the entire band of interest, which is the highest efficiency reported in literature for metal-rimmed smartphones with extremely small ground clearance.
ISSN:1687-5869
1687-5877
DOI:10.1155/2018/8070953