BGB741L7 UHF LNA 300 to 1000MHz

BGB741L7
LNA usi ng BGB741 L 7 fo r UHF 300 1000 MHz Applic atio n
Technic al Rep ort T R 140
Revision: V1.0
Date: 20 July 2009
RF and protecti on d evic es
Edition 20 July 2009
Published by
Infineon Technologies AG
81726 Munich, Germany
© 2009 Infineon Technologies AG
All Rights Reserved.
Legal Disclaimer
The information given in this document shall in no event be regarded as a guarantee of conditions or
characteristics. With respect to any examples or hints given herein, any typical values stated herein and/or any
information regarding the application of the device, Infineon Technologies hereby disclaims any and all
warranties and liabilities of any kind, including without limitation, warranties of non-infringement of intellectual
property rights of any third party.
Information
For further information on technology, delivery terms and conditions and prices, please contact the nearest
Infineon Technologies Office (www.infineon.com).
Warnings
Due to technical requirements, components may contain dangerous substances. For information on the types in
question, please contact the nearest Infineon Technologies Office.
Infineon Technologies components may be used in life-support devices or systems only with the express written
approval of Infineon Technologies, if a failure of such components can reasonably be expected to cause the
failure of that life-support device or system or to affect the safety or effectiveness of that device or system. Life
support devices or systems are intended to be implanted in the human body or to support and/or maintain and
sustain and/or protect human life. If they fail, it is reasonable to assume that the health of the user or other
persons may be endangered.
Technical Report TR140
LNA using BGB741L7 for UHF 300-1000MHz Application
TR140
Revision History: 20 July 2009
Previous Revision: No Revision
Page
Technical Report, TR140
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20 July 2009
Technical Report TR140
LNA using BGB741L7 for UHF 300-1000MHz Application
1
Overview
Device :
BGB741L7
Application:
LNA using BGB741L7 for UHF 300-1000MHz Application
PCB Marking: BGB7-Family V1.0
2
Summary of Measurement Results
Table 1
Summary of Measurement Results
Parameter
Symbol
Value
Unit
Frequency Range
Freq
650
MHz
DC Voltage
Vcc
3
V
Icc
mA
6.6
mA
Gain
G
18.5
dB
[email protected]: -30dBm
Noise Figure
NF
1.45
dB
Including SMA connectors and PCB losses of
0.1dB
Input Return Loss
RLin
17.7
dB
Output Return Loss
RLout
16.5
dB
Reverse Isolation
IRev
21.2
dB
Input P1dB
IP1dB
-5
dBm
Output P1dB
OP1dB
12.5
dBm
Input IP3
IIP3
0.8
dBm
Output IP3
OIP3
19.3
dBm
Stability
k
>1
--
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Note/Test Condition
[email protected]:-30dBm
[email protected]: -30dBm @650/651MHz
∆f =1MHz
Stability measured from 100MHz to 10GHz
20 July 2009
Technical Report TR140
LNA using BGB741L7 for UHF 300-1000MHz Application
3
Description
This Technical report provides the actual results of the LNA using the BGB741L7 from
Infineon Technologies for the UHF 300-1000MHz applications.
This Low Noise Amplifier brings a gain of 18dB minimum between the frequency
Range of 300-1000 MHz with a noise figure of 1.45dB (including SMA connectors and PCB
losses of 0.1dB).
Furthermore, this device provides an unconditional stability from 100MHz up to 10GHz. The
circuit is matched in input and output and presents an input return loss of 12.0dB and 10.5dB
concerning the output.
At the frequency of 650MHz, using two tones spaced of 1MHz, the output third-order
intercept point reaches 19.3dBm. Besides we obtain an input -1dB compression point of
-5dBm.
Technical Report, TR140
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20 July 2009
Technical Report TR140
LNA using BGB741L7 for UHF 300-1000MHz Application
4
Schematics
Figure 4-1: Schematics of the BGB741L7 for the UHF 300-1000MHz Application
Table 2 : Bill of Materials
C1
100
pF
0402
various
Input Matching/DC Block
C2
10
nF
0402
various
RF Bypass
C3
10
nF
0402
various
RF Bypass
C4
100
pF
0402
various
Output Matching/DC Block
L1
33
nH
0402
Murata LQG15A
Input Matching/DC Feed
L2
33
nH
0402
Murata LQG15A
Output Matching/DC Feed
Infineon
SiGe MMIC LNA BGB741L7 with
integrated ESD protection
Q1
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TSLP7-1
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Technical Report TR140
LNA using BGB741L7 for UHF 300-1000MHz Application
5
Measured Graphs
Transducer Power Gain
25
650 MHz
18.5 dB
2400 MHz
16.28 dB
20
15
300 MHz
17.98 dB
1000 MHz
18.33 dB
10
5
0
100
600
1100
1600
2100 2600 3100
Frequency (MHz)
3600
4100
4600 5000
Figure 5-1: Power Gain of the BGB741L7 for the UHF 300-1000MHz
Input Matching
0
-5
300 MHz
-12 dB
-10
1000 MHz
-16.68 dB
2400 MHz
-10.32 dB
-15
-20
650 MHz
-18.46 dB
-25
100
600
1100
1600
2100 2600 3100
Frequency (MHz)
3600
4100
4600 5000
Figure 5-2: Input Matching of the BGB741L7 for the UHF 300-1000MHz
Technical Report, TR140
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20 July 2009
Technical Report TR140
LNA using BGB741L7 for UHF 300-1000MHz Application
Output Matching
0
-5
2400 MHz
-8.886 dB
300 MHz
-10.51 dB
-10
-15
1000 MHz
-17.26 dB
-20
650 MHz
-17.45 dB
-25
100
600
1100
1600
2100 2600 3100
Frequency (MHz)
3600
4100
4600 5000
Figure 5-3: Output Matching of the BGB741L7 for the UHF 300-1000MHz
Reverse Isolation
50
45
40
35
2400 MHz
23.2
650 MHz
21.34
30
25
20
1000 MHz
21.57
300 MHz
21.89
15
10
100
600
1100
1600
2100 2600 3100
Frequency (MHz)
3600
4100
4600 5000
Figure 5-4: Reverse Isolation of the BGB741L7 for the UHF 300-1000MHz
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Technical Report TR140
LNA using BGB741L7 for UHF 300-1000MHz Application
Stability
5
4
668.97 MHz
1.041
3
2
1
0
100
1100
2100
3100
4100 5100 6100
Frequency (MHz)
7100
8100
9100 10000
Figure 5-5: Stability of the BGB741L7 for the UHF 300-1000MHz
Figure 5-6: OIP3 of the BGB741L7 for UHF 300-1000MHz
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20 July 2009
Technical Report TR140
LNA using BGB741L7 for UHF 300-1000MHz Application
6
Evaluation Board and layout Information
Figure 6-1: PCB picture of the BGB741L7 for UGF 300-1000MHz Application
Figure 6-2: Layout Information
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20 July 2009
w w w . i n f i n e o n . c o m
Published by Infineon Technologies AG
TR140