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2023-11-28
Hexa-Band Mobile Antenna with FSS-R-Card Combination for SAR Reduction
By
Progress In Electromagnetics Research Letters, Vol. 114, 83-89, 2023
Abstract
In this paper, a new SAR shield design method based on combining graphene-type absorbing cards with metal sheets via a frequency-selective surface resistive card (FSS-R-card) design is proposed. Based on this method, a low-SAR hexa-band antenna for mobile phone applications is designed. The proposed antenna has a simple structure consisting of two radiation strips and a coupling strip for enhancing the high-frequency bandwidth. The antenna covers multiple frequency bands, namely LTE Band 13 (747-787 MHz); DCS 1800 (1710-1880 MHz); PCS 1900 (1850-1990 MHz); WCDMA (1920-2170 MHz); LTE Band 40 (2300-2400 MHz); and Band 41 (2496-2690 MHz). The FSS-R-card combination acts like a PEC in the low-frequency band and like an R-card in the passband. With this approach, we were able to obtain the optimum results in reducing SAR levels and preserving the antenna efficiency in low bands. The prototype antenna was measured by the SAM head model, and measurement results show that the SAR is reduced up to 51% (at 1.9 GHz) by using the FSS-R-card. The SAR level is under 1.6 W/Kg over the whole band with good efficiency preservation at the low bands.
Citation
Guo Liu, Jie Gu, Zhaozhao Gao, Tao Tang, and Xiexun Zhang, "Hexa-Band Mobile Antenna with FSS-R-Card Combination for SAR Reduction," Progress In Electromagnetics Research Letters, Vol. 114, 83-89, 2023.
doi:10.2528/PIERL23092102
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