NETATMO –– Antenna Expertise – ZED US product Antenna matching and measurement report XXI-Lab Antenna matching and measurement report Projet : ZED-US XXI-Lab Le client Nom Jean-Michel Monteix Nom Frederic Esnault Date : 20/11/2020 Société NETATMO Historique Date 20/11/2020 Version 1.0 Référence Motifs Exp-NETATMO_Match_ZED-US_20-11-2020 Création Document reference Exp-NETATMO_Match_ZED-US_20-11-2020 Date Version Page 20/11/2020 1.
XXI-Lab NETATMO –– Antenna Expertise – ZED US product Antenna matching and measurement report Sommaire 1 2 3 Introduction...................................................................................................................................... 3 1.1 Type of service : ....................................................................................................................................... 3 1.2 Purpose of the study .............................................................
NETATMO –– Antenna Expertise – ZED US product Antenna matching and measurement report XXI-Lab 1 Introduction 1.1 Type of service : Tuning of antenna matching circuit at 2.4GHz (Ref XXI-Lab: Ant_dev) 1.2 Purpose of the study Search for the optimal matching network for the ZED-US product antenna - Zigbee - at 2.4GHz. 1.3 Tools used 1.4 Network analyser Anechoic chamber Input data One product in permanent transmission mode (Zigbee) Two product without firmware for conducted tests 1.
NETATMO –– Antenna Expertise – ZED US product Antenna matching and measurement report XXI-Lab 2 2.1 Wifi Antenna Performances Antenna Matching With the antenna matching circuit used by default the tuning is not good but can be considered as acceptable. figure 1. antenna matching circuit ‘’Ant-3.0nH shunt-1nH serie- 0.5pF shunt’’ used by default figure 2. Adaptation of the antenna with the matching used as default : ’Ant-3.0nH shunt-1nH serie- 0.
NETATMO –– Antenna Expertise – ZED US product Antenna matching and measurement report XXI-Lab figure 3. antenna matching circuit proposed: ‘’Ant-4.7nH shunt - 2pf serie’’ With this circuit the antenna matching is good. It is the following: figure 4.
NETATMO –– Antenna Expertise – ZED US product Antenna matching and measurement report XXI-Lab 2.2 Radiated measurements The measurements were carried out for the E1, E2 and H planes at 2405, 2442 & 2480MHz frequency in vertical and horizontal polarization with a step of 1 °. From these results the total polarization was calculated.
XXI-Lab NETATMO –– Antenna Expertise – ZED US product Antenna matching and measurement report figure 6. 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 2405MHz frequency Document reference Exp-NETATMO_Match_ZED-US_20-11-2020 Date Version Page 20/11/2020 1.
XXI-Lab NETATMO –– Antenna Expertise – ZED US product Antenna matching and measurement report figure 7. 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 2440MHz frequency Document reference Exp-NETATMO_Match_ZED-US_20-11-2020 Date Version Page 20/11/2020 1.
NETATMO –– Antenna Expertise – ZED US product Antenna matching and measurement report XXI-Lab 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.
