K3B530 Gate 868&WIFI antenna matching motherboard comes with matching.
The Return loss test device is connected successively: 8714ET network analyzer →50 ohm coaxial Cable→120mm long copper
Pipe → Test fixture.
Treatment of test fixtures: From the K3B530 gate 868&WIFI antenna 50 ohm test point with a cable leading to the SMA connector, and
The copper pipe is connected with a choke, and then the other devices are connected in turn.
The following table shows the return loss value of the edge frequency of the 868&WIFI antenna operating band of the K3B530 gate. Return from the test
loss, the relevant waveform diagram is shown in the attachment
| MHz) | Return loss | |
| 868 | 868 | -16.48 |
| 2.4G WiFi | 2400 | -7.38 |
| 2500 | -9.36 |
