Parts List/Tune Up Info

XXI-Lab
NETATMO –– Antenna Expertise – NLG US product
Antenna matching and measurement report
Document reference
Date
Version
Page
Exp-NETATMO_Match_NLG-US_25-09-2020
25/09/2020
1.0
12
3.2 Radiated measurements
The measurements were carried out for the E1, E2 and H planes at the 2405, 2440 & 2480MHz frequencies in
vertical and horizontal polarization with a step of 1 °. From these results the total polarization was
calculated.
Measurements have been done using the modem of the product tuned at maximum power for two different
product configurations: product with Zigbee matching circuit used by default – ‘’Ant-1.5pF shunt – 3.3nH
serie’’ and Zigbee matching circuit proposed – ‘’Ant -1pF shunt – 6.8nH serie’’.
The E1, E2 and H plane are those used previously for Wifi.
Results are compiled in the table below:
Radiated Power (dBm) /
Fréquence / plane
2405MHz
2440MHz
2480MHz
H
E1
H
H
E1
E2
H
E1
E2
Default matching network
‘’Ant-pf serie’’
-0.1
+0.0
+1.6
-0.2
-0.2
+1.5
-0.3
-1.1
+0.9
Proposed matching network
‘’Ant-pf serie – pF shunt’’
+2.0
+1.7
+3.9
+1.3
+1.7
+4.5
+2.1
+2.5
+4.3
tableau 2. Maximum radiated power for the default and proposed matching network
The proposed matching network allow to gain 2.3dB at 2405Mhz, 3dB at 2440 and 3.4dB at 2480MHz.