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APPLICATION SPECIFICATION
REVISION:
ECR/ECN INFORMATION:
TITLE:
Rectangular Standard NFC Antenna
Application Specification
SHEET No.
B1
EC No:
13 of 21
DATE:
DOCUMENT NUMBER:
CREATED / REVISED BY:
CHECKED BY:
APPROVED BY:
AS-1462360001
Liu Hai 2019/10/17
Cheng Kang 2019/10/17
Stary Song 2019/10/17
TEMPLATE FILENAME: APPLICATION_SPEC[SIZE_A](V.1).DOC
FIGURE 6.3 THE DISTANCE BETWEEN THE METALLIC SURFACE
AND THE STANDARD NFC ANTENNA
The below figure 6.4 to figure 6.17 show the detection distance between NFC antennas and the
three RFID tags in different distances between NFC antenna and metallic surface. The effect of
metal is evaluated with 4 different distances from the standard NFC antenna. The 4 distances are
as follow: 0mm, 5mm, 15mm and free space (without metal part).
From the Figure 6.4, Figure 6.6, Figure 6.8, Figure 6.10 and Figure 6.12 we can get that the NFC
antennas without ferrite cannot work if they are mounted on the metallic surface directly. When the
distance between NFC antenna and metallic surface is over 15mm, the detection distance
between NFC antennas and RFID tags is close to the NFC antenna detection distance in free
space.
From the Figure 6.14 to figure 6.17 we can get that the NFC antennas with ferrite and twisted pair
can work if they are mounted on the metallic surface directly. When the distance between NFC
antenna and metallic surface is over 15mm, the detection distance between NFC antennas and
RFID tags is close to the NFC antenna with ferrite detection distance in free space.
From the Figure 6.4~Figure 6.17 we can get that the distance between NFC antenna and metallic
surface is shorter than 15mm, the NFC antenna with ferrite performance is much better than the
same size NFC antenna without ferrite. We recommend use the NFC antenna with ferrite in this
situation. When the distance between NFC antenna and metallic surface is over than 15mm, the
NFC antenna with ferrite is similar with the same size NFC antenna without ferrite. We recommend
use the NFC antenna without ferrite in this situation.