1. JTA1 Antenna-wire coupling in the near field
Measurement results from ULg
Ir. V. Beauvois ; Ir. M. Renard ; P. Beerten
ULg - EMC Lab Barcelona - JTA1

2. Original problem ULg - EMC Lab Barcelona - JTA1 1, 5, 10 m Dl 1m
-30cm -> l +30cm
Dx = 5 cm
3 m
150 
5 → 30/80 cm
1,5 m
1 m
GND plane
12 m V H
10 cm
10 cm
ULg - EMC Lab Barcelona - JTA1

3. ULg - EMC Lab Barcelona - JTA1

4. Position of the antenna used for simulation of a GSM phoneV
10 cm
H //
H 
Position of the antenna used for simulation of a GSM phone
ULg - EMC Lab Barcelona - JTA1

5. Wire Ø 1.78mm (2.5mm²) instead of 2mm ; Equipments :
Generator SMY02 R&S at 13dBm 900MHz
EMI Receiver ESI26 R&S
RBW : 120kHz
m.t. : 1s
CR100 (100W)
Coaxial cables
“GSM” Antenna Kathrein ref. K
brass rod in plastic tube
Dipole (for reference) HZ-13 R&S tuned for 900MHz
ULg - EMC Lab Barcelona - JTA1

6. 100W Cable to spectrum 50W input 1m cable Ground plane
ULg - EMC Lab Barcelona - JTA1

7. 5m cable
ULg - EMC Lab Barcelona - JTA1

8. ULg - EMC Lab Barcelona - JTA1

9. ULg - EMC Lab Barcelona - JTA1

10. Measurement conditions : 1m cable
5cm, 10cm, 15cm, 20cm, 25cm, 30cm, 50cm, 80cm
5m cable
5cm, 10cm, 15cm, 30cm, 50cm, 80cm
(time consuming)
Longer cable : ground plane limit
ULg - EMC Lab Barcelona - JTA1

11. ULg - EMC Lab Barcelona - JTA1

12. ULg - EMC Lab Barcelona - JTA1

13. ULg - EMC Lab Barcelona - JTA1

14. ULg - EMC Lab Barcelona - JTA1

15. ULg - EMC Lab Barcelona - JTA1

16. ULg - EMC Lab Barcelona - JTA1

17. ULg - EMC Lab Barcelona - JTA1

18. dipole
ULg - EMC Lab Barcelona - JTA1

19. *Some uncertainties : to be checked linked to cable attenuations
ULg - EMC Lab Barcelona - JTA1

20. to check some measurements to check the values (cable attenuation)
Still to be done:
to check some measurements
to check the values (cable attenuation)
to compare our values with
other measurements
simulations
influence of “site” (open site, anechoic room,
metal plate in environment)
ULg - EMC Lab Barcelona - JTA1