Study of using fractional phantom head model on SAR evaluation in mobile antenna design

2008 ◽  
Author(s):  
K. H. Chan ◽  
C. K. Tang ◽  
L. C. Fung ◽  
S. W. Leung ◽  
Y. M. Siu
Keyword(s):  
Antenna Design ◽  
Head Model ◽  
Phantom Head

scholarly journals In-house 3D-printed surgical guides for osseous lesions of the lower jaw: an experimental study

2021 ◽  
Vol 26 (1) ◽  
Author(s):  
Lukas Postl ◽  
Thomas Mücke ◽  
Stefan Hunger ◽  
Oliver Bissinger ◽  
Michael Malek ◽  
...  
Keyword(s):  
Control Group ◽  
Head Model ◽  
Computer Assisted ◽  
3D Printer ◽  
Surgical Guide ◽  
Surgical Guides ◽  
Lower Jaw ◽  
Bony Lesion ◽  
3D Printed ◽  
Phantom Head

Abstract Background The accuracy of computer-assisted biopsies at the lower jaw was compared to the accuracy of freehand biopsies. Methods Patients with a bony lesion of the lower jaw with an indication for biopsy were prospectively enrolled. Two customized bone models per patient were produced using a 3D printer. The models of the lower jaw were fitted into a phantom head model to simulate operation room conditions. Biopsies for the study group were taken by means of surgical guides and freehand biopsies were performed for the control group. Results The deviation of the biopsy axes from the planning was significantly less when using templates. It turned out to be 1.3 ± 0.6 mm for the biopsies with a surgical guide and 3.9 ± 1.1 mm for the freehand biopsies. Conclusions Surgical guides allow significantly higher accuracy of biopsies. The preliminary results are promising, but clinical evaluation is necessary.

scholarly journals Integrated Miniature Multiband Antenna Designed for WWD and SAR Assessment for Human Exposure

2021 ◽  
Vol 2021 ◽  
pp. 1-15
Author(s):  
Brahim Fady ◽  
Jaouad Terhzaz ◽  
Abdelwahed Tribak ◽  
Fatima Riouch
Keyword(s):  
Human Body ◽  
Human Exposure ◽  
Absorption Rate ◽  
Specific Absorption Rate ◽  
Low Cost ◽  
Antenna Design ◽  
Head Model ◽  
Use Case ◽  
Wireless Devices ◽  
Multiband Antenna

The article introduces a new, low-cost, integrated, multiband antenna design intended for wristbands and wearable wireless devices (WWD). With a miniaturized planar square-shape sizing 29 × 29 mm2, the antenna can fit easily inside WWDs. The proposed design covers the most used frequency bands such as LTE2300, ISM2400, LTE2600, WiMAX3500, WiMAX5200, and ISM5800 in which the antenna reaches up to −25 dB and 6.9 dBi in terms of S11 and gain, respectively. To evaluate the exposure amenability of design on human body, we studied the specific absorption rate (SAR) of the design in two main use cases: multilayered human wrist model and a SAM (Specific Anthropomorphic Mannequin) head model. In each use case, the SAR results in different positions for all frequencies are compared to FCC standards.

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