High Head-Hand Efficiency and Low-SAR Mobile Phone Antenna Design Based on Unidirectional and Uniform Current Distribution
A high head-hand efficiency and low-SAR mobile phone antenna is proposed in this article. The impact of the antenna's current distribution on its efficiency and spatial-average specific absorption rate (SAR) is analyzed, revealing that unidirectional and uniform current distributions on the ant...
Gespeichert in:
Veröffentlicht in: | IEEE transactions on antennas and propagation 2024-07, Vol.72 (7), p.5560-5568 |
---|---|
Hauptverfasser: | , , , , , , , |
Format: | Artikel |
Sprache: | eng |
Schlagworte: | |
Online-Zugang: | Volltext bestellen |
Tags: |
Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
|
Zusammenfassung: | A high head-hand efficiency and low-SAR mobile phone antenna is proposed in this article. The impact of the antenna's current distribution on its efficiency and spatial-average specific absorption rate (SAR) is analyzed, revealing that unidirectional and uniform current distributions on the antenna can achieve a dual benefit of high head-hand efficiency and low-SAR values. Based on this idea, a double loop antenna consisted of a 1\lambda outer loop with differential feed and a 0.5\lambda inner loop with coupled feed is designed, which can implement unidirectional and uniform current distribution in a wide frequency band. The measured −6 dB impedance bandwidth of the proposed antenna can cover 1710-2690 MHz. Its measured average head-hand efficiency from 1710 to 2690 MHz is −5.3 dB (29.5%). Its simulated normalized peak head and body SAR values are lower than 1.0 W/kg. |
---|---|
ISSN: | 0018-926X 1558-2221 |
DOI: | 10.1109/TAP.2024.3407347 |