GVA-82+ - Mini Circuits

Technical Note
LTE Performance vs. Output Power
Model: GVA-82+
AN-60-047
LTE Base Station MMIC Amplifier
Mini-Circuits GVA-82+ High Dynamic Range MMIC
Amplifier is designed specifically for applications which
require high linear performance, particularly wideband,
advanced digital communications systems such as LTE
which require excellent ACLR suppression and low
EVM.
Figure 1 (GVA‐82+ Test Board) The GVA-82+ provides typically +38 dBm OIP3 which
translates to high linear performance in multi-carrier and
complex signal environments such as LTE supporting
ACLR_1 Measurements of better than -60 dBc at +8
dBm output.
The GVA-82+ is characterized using a high peak-toaverage ratio OFDM signal used for next generation
LTE within the 700MHz Downlink Band.
Device: GVA‐82+ Test board Supply Voltage: 5V, 105 mA Temperature: 25C Note: All data is referenced to the test board connectors
LTE FDD Downlink (2009-3),
Full filled 64 QAM,10MHz (50 RB)
Fc = 700 MHz
CCDF 10% 1.0% 0.1% 0.01% 0.001% 0.0001% PAR 3.63 dB 6.67 dB 8.48 dB 10.06 dB 10.90 dB 11.05 dB CCDF: Complementary Cumulative Distribution Function PAR: Peak to Average Ratio DC Power Supply
Test Signal:
DUT Configuration:
Measurement Setup
Bias Tee
DC Block
Agilent N5182A MXG
GVA‐82+
(Mounted on Characterization Test Board: TB‐313+)
Summary Data
ACLR_1 vs. Output Power
Agilent MXA
EVM vs. Output Power
LTE 700MHz Full Filled 64 QAM Waveform
LTE 700MHz Full Filled 64 QAM Waveform
0
-10
-20
-30
-40
-50
-60
-70
-80
20
EVM-Avg
EVM-Peak
15
EVM(%)
ACLR (dBc)
50 Ohm Test Cable
50 Ohm Test Cable
10
5
0
-5
+0
+5
+10
+15
Output Power(dBm)
AN‐60‐047 Rev.: A M150261 (04/14/15) File: AN60047.doc +20
-5
+0
+5
+10
+15
Output Power(dBm)
+20
Page 1 of 3 Technical Note
LTE Performance vs. Output Power
Model: GVA-82+
AN-60-047
Table 1 Data of ACLR and EVM vs. Output Power Output Power
(carrier)
dBm
ACLR (dBc)
ACLR2
LOW
20MHz
-43.3
-46.3
-49.3
-52.1
-54.8
-57.6
-60.1
-61.4
-62.2
-63.1
-63.7
-63.9
-63.8
-63.7
-63.7
-63.7
-63.7
ACLR1
LOW
10MHz
-22.0
-24.9
-28.0
-31.2
-34.5
-38.3
-42.5
-44.7
-46.8
-51.5
-56.5
-61.3
-62.7
-63.1
-63.3
-63.5
-63.7
ACLR1
HIGH
10MHz
-21.8
-24.8
-27.9
-31.2
-34.6
-38.5
-42.7
-45.0
-47.1
-51.9
-56.6
-61.4
-62.6
-63.1
-63.3
-63.4
-63.5
EVM (%)
ACLR2
HIGH
20MHz
-43.2
-46.2
-49.1
-52.0
-54.8
-57.5
-60.1
-61.1
-61.9
-63.1
-63.5
-63.7
-63.7
-63.7
-63.8
-63.7
-63.7
RMS
Peak
+19
46.187
110.03
+18
37.880
97.65
+17
10.288
93.60
+16
6.188
19.99
+15
4.068
14.46
+14
2.596
10.11
+13
1.597
7.19
+12.29
1.258
6.03
+12
0.991
4.86
+11
0.678
3.06
+10
0.559
1.99
+8
0.493
1.86
+6
0.488
1.73
+4
0.486
1.75
+2
0.482
1.70
+0
0.477
1.74
-5
0.476
1.75
Note:
For output powers less than -5dBm, ACLR measurement accuracy is limited by the dynamic range of the test
equipment.
Figure 2 ACLR Plot at Output Power of +12.29 dBm
AN‐60‐047 Rev.: A M150261 (04/14/15) File: AN60047.doc Figure 3 EVM Plot at Output Power of +12.29 dBm
Page 2 of 3 Technical Note
AN-60-047
LTE Performance vs. Output Power
Model: GVA-82+
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