29
*2:
Define α, β, θ as follows
.
Elevation angle
α
Tilt angle
β
Skew angle
θ
*3: Communication when writing in the RF tag
When controlling the RF tag for writing, the RF tag communication range tends to be narrow in
comparison with the case when reading RF tag. Available writing range becomes approximately a quarter
to a half of the available reading range.
[4] Others
(1) Data writing in RF tag may be impossible depending on the RF tag type and the ambient environment.
(2) Communication distance decreases when antenna surface crosses tag surface at right angles.
(3) Communication distance is affected by the position of the scanner in hand and holding method of the
scanner.
.
Ｚ
α
-
α
Ｚ
-
β
β
θ
-
θ
