This paper presents FDTD design analysis of a dual-band loop wire antenna for a 900/1800 MHz mobile handset with the consideration of the human hand and head effects. The loop wire antenna with a small gap of a 1 FDTD-cell size (2.5-mm) is mounted on a metallic box covered by a plastic coating. The human head is modeled as a multi-layered superquadric ellipsoid. This model can cover the case of a sphere, ellipsoid, square cube, or rectangular cube, which facilitate the modeling of the head-shape and tissue properties. The superquadric ellipsoidal head model (with the ears) comprises 9 different tissues of skin, cartilage, fat, muscle, bone, blood, nerve, brain, and eye-lens. Considering the proximity between the handset held by hand and the ear of a head, a y-oriented loop wire antenna is positioned at a distance of 1.25cm. FDTD computation and experimental measurement of the antenna VSWR (mounted on a metallic box with a plastic coating) in free space and held by a hand close to a head is performed. The radiation characteristics of the loop antenna affected by the head and the SAR distribution are important for antenna design and RF exposure studies.
|Number of pages||4|
|Journal||IEEE Antennas and Propagation Society, AP-S International Symposium (Digest)|
|Publication status||Published - 2003 Sep 1|
|Event||2003 IEEE International Antennas and Propagation Symposium and USNC/CNC/URSI North American Radio Science Meeting - Columbus, OH, United States|
Duration: 2003 Jun 22 → 2003 Jun 27
All Science Journal Classification (ASJC) codes
- Electrical and Electronic Engineering