NETATMO –– Antenna Expertise – NLG US product Antenna matching and measurement report XXI-Lab Antenna matching and measurement report Projet : NLG-US XXI-Lab Le client Nom Jean-Michel Monteix Nom Frederic Esnault Date : 25/09/2020 Société NETATMO Historique Date 25/09/2020 Version 1.0 Référence Motifs Exp-NETATMO_Match_NLG-US_25-09-2020 Création Document reference Exp-NETATMO_Match_NLG-US_25-09-2020 Date Version Page 25/09/2020 1.
XXI-Lab NETATMO –– Antenna Expertise – NLG US product Antenna matching and measurement report Sommaire 1 2 3 4 Introduction...................................................................................................................................... 3 1.1 Type of service : .................................................................................................................................. 3 1.2 Purpose of the study ...............................................................
NETATMO –– Antenna Expertise – NLG 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 networks for the NLG-US product antennas - Wifi & Zigbee - at 2.4GHz. 1.3 Tools used 1.
NETATMO –– Antenna Expertise – NLG 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. The resonance frequency is too low. figure 1. figure 2. antenna matching circuit ‘’Ant-1.5pf serie’’ used by default Adaptation of the antenna with the matching used as default : ‘’Ant-1.5pf serie’’ A new matching circuit has been designed to improve the antenna tuning.
NETATMO –– Antenna Expertise – NLG US product Antenna matching and measurement report XXI-Lab figure 3. antenna matching circuit proposed: ‘’Ant-1pf serie – 1pf shunt’’ With this circuit the antenna matching is good. It is the following: figure 4.
NETATMO –– Antenna Expertise – NLG 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 the2412, 2442 & 2480MHz frequency in vertical and horizontal polarization with a step of 1 °. From these results the total polarization was calculated.
XXI-Lab figure 6. NETATMO –– Antenna Expertise – NLG US product Antenna matching and measurement report From left to right, from top to bottom, Radiation pattern for E1, E2 and H planes for the 2412MHz frequency Document reference Exp-NETATMO_Match_NLG-US_25-09-2020 Date Version Page 25/09/2020 1.
XXI-Lab figure 7. NETATMO –– Antenna Expertise – NLG US product Antenna matching and measurement report From left to right, from top to bottom, Radiation pattern for E1, E2 and H planes for the 2442MHz frequency Document reference Exp-NETATMO_Match_NLG-US_25-09-2020 Date Version Page 25/09/2020 1.
XXI-Lab figure 8. NETATMO –– Antenna Expertise – NLG US product Antenna matching and measurement report From left to right, from top to bottom, Radiation pattern for E1, E2 and H planes for the 2480MHz frequency Document reference Exp-NETATMO_Match_NLG-US_25-09-2020 Date Version Page 25/09/2020 1.
NETATMO –– Antenna Expertise – NLG US product Antenna matching and measurement report XXI-Lab 3 3.1 Zigbee Antenna Performances Antenna Matching With the antenna matching circuit used by default the tuning is not good. The resonance frequency is too low. figure 9. antenna matching circuit ‘’Ant-1.5pf shunt – 3.3nHserie’’ used by default figure 10. Adaptation of the antenna with the matching used as default : ‘’Ant-1.5pf shunt 3.
XXI-Lab NETATMO –– Antenna Expertise – NLG US product Antenna matching and measurement report A new matching circuit has been designed to improve the antenna tuning. This circuit is the following: figure 11. antenna matching circuit proposed: ‘’Ant-1pf shunt – 6.8nH serie’’ With this circuit the antenna matching is good. It is the following: figure 12. Adaptation of the antenna with the matching proposed : ‘’Ant-1pf shunt -6.
NETATMO –– Antenna Expertise – NLG US product Antenna matching and measurement report XXI-Lab 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.
XXI-Lab NETATMO –– Antenna Expertise – NLG US product Antenna matching and measurement report figure 13. From left to right, from top to bottom, Radiation pattern for E1, E2 and H planes for the 2405MHz frequency Document reference Exp-NETATMO_Match_NLG-US_25-09-2020 Date Version Page 25/09/2020 1.
XXI-Lab NETATMO –– Antenna Expertise – NLG US product Antenna matching and measurement report figure 14. From left to right, from top to bottom, Radiation pattern for E1, E2 and H planes for the 2440MHz frequency Document reference Exp-NETATMO_Match_NLG-US_25-09-2020 Date Version Page 25/09/2020 1.
XXI-Lab NETATMO –– Antenna Expertise – NLG US product Antenna matching and measurement report figure 15. From left to right, from top to bottom, Radiation pattern for E1, E2 and H planes for the 2480MHz frequency Document reference Exp-NETATMO_Match_NLG-US_25-09-2020 Date Version Page 25/09/2020 1.
XXI-Lab 4 NETATMO –– Antenna Expertise – NLG US product Antenna matching and measurement report Conclusion Zigbee or Wifi antennas are not well matched with matching network used by default. New matching networks are necessary. Different matching network have been designed and measured. Among those different circuits, the best has been proposed for each antenna. With those matching network radiated power has been improved by 2.1dB at 2412Mhz, 1.3dB at 2442 and 0.6dB at 2480MHz for Wifi 2.
