Research Article
A Novel Cellular Handset Design for an Enhanced Antenna Performance and a Reduced SAR in the Human Head
Table 3
Computational
results of the antenna performance parameters of both handset models at 900 MHz
in all cases.
| | Frequency | 900 MHz | | in (dB) | Gain (dBi) | Radiation efficiency | Total efficiency | | Handset model | Model | Model | Model | Model | Model | Model | Model | Model | | no. 1 | no. 2 | no. 1 | no. 2 | no. 1 | no. 2 | no. 1 | no. 2 |
| | Handset in free-space | | | 1.72 | 1.8 | 85.76% | 86.9% | 85.63% | 86.33% | | Handset in hand only | | | 1.23 | | 48.4% | 41.0% | 45.9% | 39.7% | | Handset in hand close to SAM
(Cheek position) | | | | | 7.3% | 11.7% | 7.1% | 11.5% | | Handset in hand close to SAM (Tilt position) | | | | | 18.8% | 21.5% | 18.5% | 21.2% | | Handset in hand close to HR-EFH (Cheek position) | | | | | 12.8% | 17.3% | 12.3% | 17.2% | | Handset in hand close to HR-EFH (Tilt position) | | | | | 25.0% | 25.6% | 24.5% | 25.3% |
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