Omron V680-HAM91 User Manual page 163

Influence of RF Tag Angle (Reference)
Install Antennas and RF Tags as parallel to each other as possible.
Communications are possible even when an Antenna and an RF Tag are mounted at an angle, but the
communications distance will be shortened. The relation between the angle and the communications
distance is shown below.
Reduction in Communications Distance for V680-D2KF67M Angle
V680-HS52 and V680-D8KF67M
(Metal on back: Steel)
V680-HS63 and V680-D8KF67M
(Metal on back: Steel)
V680-HS65 and V680-D8KF67M
(Metal on back: Steel)
Measurement Conditions
V680-HS52 and V680-D8KF67M
(Metal on back: Steel)
RF Tag
Antenna
V680-HS65 and V680-D8KF67M
(Metal on back: Steel)
Metallic
material
RF Tag
Antenna
0 10
0% 0%
0% 0%
−1%
0%
θ
θ
RF Tag angle (θ°)
20 30
0% 0%
−1% −2%
−3% −9%
V680-HS63 and V680-D8KF67M
(Metal on back: Steel)
Non-metallic
material
Antenna
Section 7
Appendices
40
0%
−5%
−19%
θ
RF Tag
RFID System
161
User's Manual