4-2 Influence of Peripheral Metals of Antenna Installation Site
Consider the influence of peripheral metals when installing the Antenna. Peripheral metals may greatly lower the communication distance for the Antenna.
•Influence of back metals
The following diagram shows the percentage of reduction in communication distance when a metal is mounted on the back of the Antenna.
The horizontal axis in the diagram refers to the distance between the back of the Antenna and the metal plate, and the vertical axis refers to the relative communication distance on the assumption that the communication distance without mounting metals is 100, that is, the reduced percentage of the communication distance.
Influence of back metals
|
| 100 |
|
|
|
|
| (%) | 90 |
|
|
|
|
| 80 |
|
|
|
| |
of | distance |
|
|
|
| |
70 |
|
|
|
| ||
60 |
|
|
|
| ||
|
|
|
|
| ||
交信距離の低下率（％） | 50 |
|
|
|
| |
40 |
|
|
|
| ||
30 |
|
|
|
| ||
|
|
|
|
| ||
percentageReduced | communication | 20 |
|
|
|
|
| the | 10 |
|
|
|
|
|
| 0 |
|
|
|
|
|
| 0 | 200 | 400 | 600 | 800 |
Distance between the back of the Antenna and the metal plate Y(mm)
Metal Antenna
Tag
Distance between Communication Distan back metal and Antenna
Influence of Peripheral Metals
●Peripheral metals may greatly lower the communication distance of the Antenna. Verify the communication performance and ensure it has enough read range beforehand if there is any metal object near the antenna installation site.