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Technical Report, 2009-Apr-23
Technical Report
___________________________________________________________
50Ω-Matched LNA using BGB741L7ESD for FM Application 80-110MHz
Technical Report <TR130>
BDTIC
Device:
BGB741L7ESD
Application: 50Ω-Matched LNA for FM Application
80-110MHz
Revision:
Rev. 1.0
Date:
2009-Apr-23
RF and Protection Devices
Measurement Report
1/9
www.BDTIC.com/infineon
2009-04-23
Technical Report
___________________________________________________________
50Ω-Matched LNA using BGB741L7ESD for FM Application 80-110MHz
BDTIC
Published by
Infineon Technologies AG
81726 München, Germany
© Infineon Technologies AG 12/18/09.
All Rights Reserved.
Legal Disclaimer
The information given in this document shall in no event be regarded as a guarantee of conditions or
characteristics (“Beschaffenheitsgarantie”). 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 your
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 your nearest Infineon Technologies Office.
Infineon Technologies Components may only be used in life-support devices or systems 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.
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2009-04-23
Technical Report
___________________________________________________________
50Ω-Matched LNA using BGB741L7ESD for FM Application 80-110MHz
1. Overview
Infineon Device: BGB741L7ESD
Application:
50Ω-Matched LNA for FM 80-110MHz Applications
PCB Marking:
BGB7-Family TSLP-7-1
V1.0
2. Summary of Measurement Results
BDTIC
Table 2-1: Summary of Measurement Results
Parameter
Symbol
Value
Unit
Note/Test Condition
Frequency Range
Freq
80-110
MHz
DC Voltage
Vcc
3.0
V
DC Current
Icc
6
mA
Gain
G
16.1
dB
Power @ port1= -30 dBm
Noise Figure
NF
1.2
dB
Including SMA connectors
and PCB losses of 0.1dB
Input Return Loss
RLin
-10.2
dB
Output Return Loss
RLout
-14.7
dB
Reverse Isolation
|IRev|
23.5
dB
Input P1dB
IP1dB
-8.9
dBm
Output P1dB
OP1dB
6.2
dBm
Input IP3
IIP3
0.3
dBm
Output IP3
OIP3
16.4
dBm
Stability
k
>1.1
--
Measurement Report
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Power @ port2 = -10 dBm
Power @ Input = -30 dBm
Measured @ f1=100MHz
∆f =1 MHz
Stability measured up to 10GHz
www.BDTIC.com/infineon
2009-04-23
Technical Report
___________________________________________________________
50Ω-Matched LNA using BGB741L7ESD for FM Application 80-110MHz
3. Description:
This report presents the measurement results of the Low Noise Amplifier using the
SiGe:C LNA BGB741L7ESD from Infineon Technologies for the 80-110MHz FM
application with an good input and output matching to 50 ohms. The LNA brings a
gain of 16.1dB on the frequency of 80-110MHz with a noise figure of 1.2 dB
(including the SMA connector and PCB losses of 0.1dB).
BDTIC
Furthermore, this device provides an unconditionally stability up to 10GHz. With a
current of 6.3mA, this circuit achieves an output P1dB of +6.2dBm and OIP3 of +16.4
dBm (in-band).
Measurement Report
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2009-04-23
Technical Report
___________________________________________________________
50Ω-Matched LNA using BGB741L7ESD for FM Application 80-110MHz
4. Schematics:
BDTIC
Figure 4-1: Schematic of the BGB741L7ESD for the FM 80-110 MHz Applications.
Table 4-1: Bill of Materials
Symbol Value Unit Size
Manufacturer
Comment
C1
100
pF
0402 various
Input Matching/DC Block
C2
10
nF
0402 various
RF Bypass
C3
10
nF
0402 various
RF Bypass
C4
330
pF
0402 various
Output Matching/DC Block
L1
270
nH
0402
R1
110
Ω
0402 various
Dc Feed to collector
TSLP
Infineon
7-1
SiGe MMIC LNA BGB741L7
with integrated ESD protection
Q1
Measurement Report
Murata
LQG15A
5/9
Input Matching/DC Feed
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2009-04-23
Technical Report
___________________________________________________________
50Ω-Matched LNA using BGB741L7ESD for FM Application 80-110MHz
5. Measured Graphs
Transducer Power Gain
20
15
80 MHz
16.33 dB
10
100 MHz
16.19 dB
110 MHz
16.14 dB
BDTIC
5
0
10
30
50
70
90
110
130
Frequency (MHz)
150
170
190
210
Figure 5-1: Transducer Power Gain of the BGB741L7ESD for FM.
Input Matching
0
-5
80 MHz
-10.52 dB
100 MHz
-10.31 dB
110 MHz
-10.24 dB
-10
-15
-20
-25
10
30
50
70
90
110
130
Frequency (MHz)
150
170
190
210
Figure 5-2: Input Matching of the BGB741L7ESD for FM.
Measurement Report
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2009-04-23
Technical Report
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50Ω-Matched LNA using BGB741L7ESD for FM Application 80-110MHz
Output Matching
0
-5
80 MHz
-14.75 dB
100 MHz
-16.52 dB
-10
110 MHz
-17.27 dB
-15
-20
BDTIC
-25
-30
10
30
50
70
90
110
130
Frequency (MHz)
150
170
190
210
190
210
Figure 5-3: Output Matching of the BGB741L7ESD for FM.
Reverse Isolation
40
35
100 MHz
23.5
80 MHz
23.63
30
110 MHz
23.49
25
20
10
30
50
70
90
110
130
Frequency (MHz)
150
170
Figure 5-4: Reverse Isolation of the BGB741L7ESD for FM.
Measurement Report
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2009-04-23
Technical Report
___________________________________________________________
50Ω-Matched LNA using BGB741L7ESD for FM Application 80-110MHz
Stability
5
4
41.219 MHz
1.139
2
BDTIC
0
10
1010
2010
3010
4010 5010 6010
Frequency (MHz)
7010
8010
9010 10000
Figure 5-5: Stability of the BGB741L7ESD for FM.
Figure 5-6: OIP3 of the BGB741L7ESD for FM.
Measurement Report
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2009-04-23
Technical Report
___________________________________________________________
50Ω-Matched LNA using BGB741L7ESD for FM Application 80-110MHz
6. Evaluation Board and Layout Information
BDTIC
Figure 6-1: PCB Picture of the BGB741L7ESD
Figure 6-2: Layout Information
www.Infineon.com
Published by Infineon Technologies AG
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