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Zigbee module question

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I'm trying to implement the XBee-PRO® RF Module, for 2.4GHz.
I placed two metal stations on the ground, with 4m distance from each other. My antennas are located 20cm above the surface, and I can't put them higher from application reasons, and the antenna is attached to a plastic board , on the base top. The plastic board is the inner part of a metal cover for each of the stations.
Each of the antennas were of TaoGlas FXP 72 dipole antanna model.
Then, I run a simple test, transmitting a packet from one station to the other and backward to the first station.

For each packets stream: Standard deviation is rather small though (not more than 1.4). However, the RSSI mean value varies much (up to 12dBm between two consecutive stream series).
I kept on the same setup conditions. What can be the reason? I'll be thankful for any comment.

asked Jun 26, 2018 in RF Solutions and XBee by Eldad New to the Community (0 points)

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