Parts List/Tune Up Info

XXI-Lab
NETATMO –– Antenna Expertise – ZED US product
Antenna matching and measurement report
Document reference
Date
Version
Page
Exp-NETATMO_Match_ZED-US_20-11-2020
20/11/2020
1.0
9
figure 8. From left to right, from top to bottom, Radiation pattern for product with default
matching and proposed matching for H, E1 and E2 planes for the 2480MHz frequency
3 Conclusion
Zigbee antenna is not well matched with matching network used by default.
Different matching network have been designed and measured. Among those different circuits, the best has
been proposed. It allows improving the radiated performances about 2dB whatever the Zigbee frequency.
Taken into account a power measured at +6.3dBm at the antenna port, then the antenna gain is about +4dBi,
what is very good for such a product.