Transcript Target Values for Dipole Validations at New RF Probe

Calibration values for dipole validations at
new RF probe separation distance of 1.5cm
PINS-C item 5.k
Jagadish Nadakuduti
EME Research Engineer, Motorola, Inc.
C63.19 SC8 WG3 meeting, March 28,
26, 2006
2007
Outline
•
Background
– C63.19-2006 Amendment: Change the RF measurement
position from bottom of probe element to the center of
element and change the test distance from 10mm to 15mm
•
FDTD simulations
•
Updated Table 4.2 and Table D.4
•
Measurements
•
Conclusion
C63.19 SC8 WG3 meeting, March 26, 2007
Background: PINS-C item 5.k
The RF probe separation distance is 15 mm and the calibration values in table 4.2
were made at 10 mm. These calculations need to be redone at 15 mm distance.
15 mm
C63.19 SC8 WG3 meeting, March 26, 2007
FDTD simulations: E- & H-field patterns
Update field values from
10 mm to 15 mm distance
C63.19 SC8 WG3 meeting, March 26, 2007
FDTD simulations: Results at 10 mm
•
•
Created FDTD models as specified in “D.5.1.4 Dipole
validation theoretical modeling”.
Comparison of FDTD simulations results to those
specified in Table D.4.
Table D-4. Results of FDTD modeling for ‘Thick dipoles’
(existing values vs. new simulation results)
Mod.
Freq.
(MHz)
CW peak E (V/m)
existing
new
CW peak H (A/m)
existing
new
|Zo|
(Ω)
Return
loss (dB)
VSWR
Gain
(dBi)
CW
813.5
268
270.9
0.68
0.6651
74.7, 75.8
-10.0, -10.1
1.925, 1.9
2.25, 2.235
CW
835
265
261.4
0.673
0.6847
75.3, 76.3
-12.0, -12.1
1.67, 1.66
2.32, 2.29
CW
898.5
262
264.7
0.675
0.6820
75.5, 76.9
-11.9, -11.8
1.68, 1.69
2.33, 2.3
CW
1880
211
211.6
0.645
0.6482
87.1, 89.7
-10.6, -10.3
1.837, 1.87
2.52, 2.55
C63.19 SC8 WG3 meeting, March 26, 2007
FDTD simulations: Results at 10 mm contd.
•
CW peak E- and H-field values taken from table D-4 are converted into
RMS values. These values are incorporated into Table 4.2.
Table 4.2 – Illustrated dipole calculated values (existing and new simulation results)
•
Dipole
Freq.
(MHz)
E-field values (V/m)
existing
new
difference
H-field values (A/m)
existing
new
difference
D.5.1 thick
813.5
190
192
1.1%
0.476
0.4842
1.7%
D.5.1 thick
835
187
185
-1.1%
0.481
0.4703
-2.2%
D.5.1 thick
898.5
185
187
1.1%
0.477
0.4822
1.1%
D.5.1 thick
1880
149
150
0.7%
0.456
0.4584
0.5%
D.5.1 planar
813.5
224.6 - 236.4
257.2
8.8%
0.5139-0.5226
0.57
9.1%
D.5.1 planar
835
214.9 - 232.2
250
7.7%
0.4954-0.5164
0.5523
7%
D.5.1 planar
898.5
213.2 - 220.9
248.4
12.4%
0.5032-0.5005
0.5622
11.7%
D.5.1 planar
1880
153.6 - 149.3
182.3
18.7%
0.4478-0.4035
0.5091
13.7%
“D.5.1.4 Dipole validation theoretical modeling” section describes simulations
for ‘thick dipoles’ and has no information on modeling parameters for ‘planar
dipoles’. The relatively high difference between values specified in table 4.2
and those from new simulations in case of ‘planar dipoles’ might be because
of using different simulation parameters.
C63.19 SC8 WG3 meeting, March 26, 2007
Measurements:
At 10 and 15 mm of probe separation distance with 100 mW of input power
•
Thick dipoles
Frequency
E (V/m)
H (A/m)
(MHz)
10 mm 15 mm 10 mm 15 mm
813.5
171
108.3
0.4597
0.3146
835
185.9
116.6
0.4692
0.3253
1880
156.2
96.1
0.4433
0.3192
*898.5 MHz thick dipole is not available in the lab
•
Planar dipoles
Frequency
E (V/m)
H (A/m)
(MHz)
10 mm 15 mm 10 mm 15 mm
813.5
211.9
131.1
0.497
0.3391
835
213.5
131.5
0.4987
0.3412
898.5
202.7
126.4
0.4963
0.3423
1880
153.4
93.05
0.4748
0.3289
C63.19 SC8 WG3 meeting, March 26, 2007
Updated Table D.4 at 15 mm
Table D-4. Results of FDTD modeling at 15 mm
Mod.
Freq.
(MHz)
CW peak E
(V/m) (dB V/m)
CW peak H
(A/m) (dB A/m)
|Zo|
(Ω)
Return
loss (dB)
VSWR
Gain
(dBi)
CW
813.5
179
45.1
0.493
-6.14
75.8
-10.1
1.9
2.235
CW
835
172
44.7
0.48
-6.38
76.3
-12.1
1.66
2.29
CW
898.5
174
44.8
0.492
-6.16
76.9
-11.8
1.69
2.3
CW
1880
139
42.9
0.472
-6.52
89.7
-10.3
1.87
2.55
C63.19 SC8 WG3 meeting, March 26, 2007
Table 4.2 at 10 mm with measurement results
Table 4.2 – Illustrated dipole calculated and measured values
Dipole
Freq.
(MHz)
E-field values (V/m)
calculated
measured
difference
H-field values (A/m)
calculated
measured
D.5.1 thick
813.5
192
171
-10.94%
0.4842
0.4597
-5.06%
D.5.1 thick
835
185
185.9
-0.49%
0.4703
0.4692
-0.234%
D.5.1 thick
898.5
187
-
-
0.4822
-
-
D.5.1 thick
1880
150
156.2
4.13%
0.4584
0.4433
-3.29%
D.5.1 planar
813.5
257.2
211.9
-17.6%
0.57
0.497
-12.8%
D.5.1 planar
835
250
213.5
-14.6%
0.5523
0.4987
-9.7%
D.5.1 planar
898.5
248.4
202.7
-18.4%
0.5622
0.4963
-11.7%
D.5.1 planar
1880
182.3
153.4
-15.85%
0.5091
0.4748
-6.7%
C63.19 SC8 WG3 meeting, March 26, 2007
difference
Updated Table 4.2 at 15 mm with measurement
results
Table 4.2 – Illustrated dipole calculated and measured values
Dipole
Freq.
(MHz)
E-field values (V/m)
calculated
measured
difference
H-field values (A/m)
calculated
measured
D.5.1 thick
813.5
127
108.3
-14.72%
0.349
0.3146
-9.86%
D.5.1 thick
835
122
116.6
-4.43%
0.339
0.3253
-4.04%
D.5.1 thick
898.5
123
-
-
0.348
-
-
D.5.1 thick
1880
98
96.1
-1.94%
0.334
0.3192
-4.43%
D.5.1 planar
813.5
156.3
131.1
-16.12%
0.39
0.3391
-13.05%
D.5.1 planar
835
151.5
131.5
-13.20%
0.3787
0.3412
-9.90%
D.5.1 planar
898.5
150.2
126.4
-15.85%
0.3853
0.3423
-11.16%
D.5.1 planar
1880
106.8
93.05
-12.87%
0.3475
0.3289
-5.35%
C63.19 SC8 WG3 meeting, March 26, 2007
difference
Conclusion
• ‘Planar dipole’ FDTD simulations need to be repeated with
the correct parameters.
• The following sections in C63.19-2006 need to be updated
with calibration values at 15 mm distance
– In Section 4.4:
• Table 4.2
– In Annex D:
• Table D.4
• Figures D.3 - D.6, D.10
• Equations D.1 & D.2
• Include ‘Planar dipole’ simulation parameters in section
‘D.5.1.4 Dipole validation theoretical modeling’.
• All of the above tasks can be completed in a time frame of
1-2 months. C63.19 SC8 WG3 meeting, March 26, 2007
Thank you
C63.19 SC8 WG3 meeting, March 26, 2007
Table 4.2 at 10 mm
C63.19 SC8 WG3 meeting, March 26, 2007
Table D-4 at 10 mm
C63.19 SC8 WG3 meeting, March 26, 2007