Abstract
The deterministic ear-to-ear on-body channel is
modeled by the use of a number of elliptically shaped paths. The
semi-major axes of the elliptica
lly shaped paths are adjusted such
that they trace the outline of the head. The path gain converges
when the number of paths is increased, su
ch that the head is mod-
eled more accurately, and the radiation pattern is sampled in more
points. The model is able to take the on-body radiation pattern
of the antenna, as well as arbitrary he
ad contours into account.
The model is validated by the use of measurements and Ansys
HFSS simulations on the specific anthropomorphic mannequin
(SAM) head. The model is used with a g
enetic algorithm in order
to synthesize a radiation pattern that is optimal for use with the
ear-to-ear on-body channel. The radiation pattern is synthesized
in terms of the spherical wave
expansion coefficients of the hypothetical small antenna. The variation in the ear-to-ear on-body
path gain, due to perturbations of the shape of the nominal SAM
head, is studied by the use of a Monte Carlo analysis. The analysis
revealed that the path gain that is obtained with a single on-body
radiation pattern may vary upto 25dB.
| Original language | English |
|---|---|
| Journal | IEEE Transactions on Antennas and Propagation |
| Volume | 63 |
| Issue number | 1 |
| Pages (from-to) | 344-352 |
| ISSN | 0018-926X |
| DOIs | |
| Publication status | Published - 2015 |
Keywords
- Channel model
- Creeping waves
- Ear-to-ear
- Hearing instrument
- Monte carlo analysis
- On-Body
- Path gain
- WBAN