AN189 - Infineon

BF P740 F ES D
Dual B and LN A f or Wi MA X/W LA N
2.3 - 2.7 G H z and 5 -6 G Hz a ppli c ations
Applic atio n N ote A N 189
Revision: Rev. 1.0
2010-10-15
RF and P r otecti on D evic es
Edition 2010-10-15
Published by
Infineon Technologies AG
81726 Munich, Germany
© 2010 Infineon Technologies AG
All Rights Reserved.
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BFP740FESD
Dual Band LNA for WiMAX/WLAN 2.3-2.7GHz and 5-6GHz applications
Application Note AN189
Revision History: 2010-10-15
Previous Revision: no previous revision
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Application Note AN189, Rev. 1.0
3 / 22
2010-10-15
BFP740FESD
Dual Band LNA for WiMAX/WLAN 2.3-2.7GHz and 5-6GHz
applications
List of Content, Figures and Tables
Table of Content
1
Introduction ........................................................................................................................................ 5
2
Using BFP740FESD for WiMAX/WLAN 2.3-2.7GHz and 5-6GHz Applications ............................. 6
3
Application Information ..................................................................................................................... 8
4
Typical Measurement Results ........................................................................................................... 9
5
Measured graphs from 2.3 to 2.7GHz ............................................................................................. 10
6
Measured graphs from 5.0 to 6.0GHz ............................................................................................. 14
7
Evaluation Board and layout Information ...................................................................................... 20
Authors .............................................................................................................................................. 21
List of Figures
Figure 1
Figure 2
Figure 3
Figure 4
Figure 5
Figure 6
Figure 7
Figure 8
Figure 9
Figure 10
Figure 11
Figure 12
Figure 13
Figure 14
Figure 15
Figure 16
Figure 17
Figure 18
Figure 19
Figure 20
Figure 21
Figure 22
Figure 23
Figure 24
Figure 25
BFP740FESD in TSFP-4 Package ...................................................................................................... 5
WiMAX/WLAN Transceiver system ...................................................................................................... 7
Schematics of the application circuit .................................................................................................... 8
Insertion power gain of the BFP740FESD for WLAN/Wimax at 2.3-2.7GHz ..................................... 10
Noise figure of the BFP740FESD for WLAN/Wimax at 2.3-2.7GHz .................................................. 10
Input matching of the BFP740FESD for WLAN/Wimax at 2.3-2.7GHz.............................................. 11
Output matching of the BFP740FESD for WLAN/Wimax at 2.3-2.7GHz ........................................... 11
Reverse Isolation of the BFP740FESD for WLAN/Wimax at 2.3-2.7GHz ......................................... 12
Input 1dB compression point of the BFP740FESD for WLAN/Wimax at 2.3-2.7GHz ....................... 12
rd
Output 3 order Intercept point of the BFP740FESD for WLAN/Wimax at 2.3-2.7GHz .................... 13
Input and Output impedance of the BFP740FESD for WLAN/Wimax at 2.3-2.7GHz ........................ 13
Insertion power gain of the BFP740FESD for WLAN/Wimax at 5-6GHz ........................................... 14
Noise figure of the BFP740FESD for WLAN/Wimax at 5-6GHz ........................................................ 14
Input matching of the BFP740FESD for WLAN/Wimax at 5-6GHz .................................................... 15
Output matching of the BFP740FESD for WLAN/Wimax at 5-6GHz ................................................. 15
Reverse isolation of the BFP740FESD for WLAN/Wimax at 5-6GHz................................................ 16
Input 1dB compression point of the BFP740FESD for WLAN/Wimax at 5-6GHz ............................. 16
rd
Output 3 order intercept point of the BFP740FESD for WLAN/Wimax at 5-6GHz .......................... 17
Input and Output impedance of the BFP740FESD for WLAN/Wimax at 5-6GHz .............................. 17
K-factor stability of the BFP740FESD for WLAN/Wimax 2.3-2.7&5-6GHz applications .................... 18
µ-factor stability of the BFP740FESD for WLAN/Wimax 2.3-2.7&5-6GHz applications .................... 18
Rise switching time of the BFP740FESD for WLAN/Wimax 2.3-2.7&5-6GHz applications............... 19
Fall switching time of the BFP740FESD for WLAN/Wimax 2.3-2.7&5-6GHz applications ................ 19
PCB Picture of Evaluation Board ....................................................................................................... 20
PCB Layer Information ....................................................................................................................... 20
List of Tables
Table 1
Table 2
Table 3
Table 4
Pin definition ......................................................................................................................................... 5
Bill-of-Materials..................................................................................................................................... 8
Summary of Measurement results for WiMAX/WLAN 2.3-2.7GHz (at room temperature) ................. 9
Summary of Measurement results for WiMAX/WLAN 5-6GHz (at room temperature) ...................... 9
Application Note AN189, Rev. 1.0
4 / 22
2010-10-15
BFP740FESD
Dual Band LNA for WiMAX/WLAN 2.3-2.7GHz and 5-6GHz applications
Introduction
1
Introduction
1.1
Features
• Robust high performance low noise amplifier
based on Infineon´s reliable, high volume
SiGe:C wafer technology
•2 kV ESD robustness (HBM) due to integrated
protection circuits
•Thin, small, flat, Pb- and halogen free (RoHS
compliant) package with visible leads
1.2
Figure 1
BFP740FESD in TSFP-4 Package
Applications
The BFP740FESD from Infineon Technologies is a SiGe:C Heterojunction bipolar transistor dedicated
for low noise amplificators applications. Packaged into a TSFP-4 package, this transistor is easy-touse for the designs. The pin configuration is shown in Table 1.
Pin definition
Table 1
Pin
Pin name
1
2
3
4
B
E
C
E
Comments
Base of the BFP740FESD transistor
Emitter of the BFP740FESD transistor
Collector of the BFP740FESD transistor
Emitter of the BFP740FESD transistor
This component is also suitable for WiMAX middle band (from 3.3 to 3.7GHz) and is therefore
interesting for all the WiMAX/WLAN applications. However, this device fits for all GPS LNAs
(1575MHz) and also for cordless phones systems (5.8GHz).
Application Note AN189, Rev. 1.0
5 / 22
2010-10-15
BFP740FESD
Dual Band LNA for WiMAX/WLAN 2.3-2.7GHz and 5-6GHz applications
Using BFP740FESD for WiMAX/WLAN 2.3-2.7GHz and 5-6GHz Applications
2
Using BFP740FESD for WiMAX/WLAN 2.3-2.7GHz and 5-6GHz
Applications
Since the last 50 years, we saw a constant evolution on the field of wireless communications.
Humans always try to communicate even longer and with the biggest amount of information to share.
As the technology is getting more and more portative, the need to transfer datas and networks without
any cable became important.
Nowadays, with the progress of technology regarding cell phones and others communication supports
like computers and internet, the information traffic is getting heavier and heavier. Therefore, the
telecommunications authorities which regulate and allocate frequency bands to users (military or
public applications) have adopted the WLAN standards IEEE 802.11 a, b, and g… with different
frequency bands especially dedicated for local area networks (LAN) in order to link computers to the
web internet.
But, where the link to internet is difficult to provide or the infrastructures are getting too much
expensive for places like villages or small towns, a new solution called WiMAX appeared. This
standard that internet providers are now more and more developing, is created to link towns to the
Wide Area Network (WAN) using wireless connections. Thus, users are able to use WiMAX from
office to home with a wireless link.
Application Note AN189, Rev. 1.0
6 / 22
2010-10-15
BFP740FESD
Dual Band LNA for WiMAX/WLAN 2.3-2.7GHz and 5-6GHz applications
Using BFP740FESD for WiMAX/WLAN 2.3-2.7GHz and 5-6GHz Applications
This application note describes the BFP740FESD performances for WiMAX and WLAN high/Low
bands.
The Figure 2 presents the transmission reception Tx/Rx at each user side. In order to receive and
treat the signal information received at the antenna, the weak signal needs to be amplified. Therefore,
the use of an LNA is essential to amplify the signal generating a really low noise and thus, preserve
the signal integrity. The use of BFP740FESD is interesting for this application, since, it is amplifying
both high and also low band signals regarding WLAN and WiMAX.
Figure 2
WiMAX/WLAN Transceiver system
The BFP740FESD is here presented in LNA configuration (please see the Figure 3 for the circuit
schematic and Table 2 for the Bill-of-Materials). The summary of measurement results is located on
Table 3 and Table 4
The LNA provides a gain of about 14.0 dB in low band and 12.0 dB in high band of the WiMAX/WLAN
standard. This LNA brings for both bands a maximum noise figure of 1.4 dB. The input and output are
matched to 50 Ω with at least 9 dB matching.
The input 1dB compression point is reaching -15.5 dBm (low band) and -5.5 dBm (high band). The
input 3rd Order intercept point is located at -6.0 dBm (low band) and 6.0 dBm (high band).
Application Note AN189, Rev. 1.0
7 / 22
2010-10-15
BFP740FESD
Dual Band LNA for WiMAX/WLAN 2.3-2.7GHz and 5-6GHz applications
Application Information
3
Application Information
3.1
Schematic diagram
Figure 3
Table 2
Schematic diagram of the application circuit
Bill-of-Materials
Symbol
Value
Unit
Size
C1
3.6
pF
0402
Various
Input Matching/DC Block
C2
33
pF
0402
Various
RF signal to ground
C3
33
pF
0402
Various
RF signal to ground
C4
3.0
pF
0402
Various
Stability/Gain reduction@2.4GHz
C5
22
pF
0402
Various
Output Matching/DC Block
L1
1.0
nH
0402
Murata LQG series
Input Matching/DC Block
L2
1.6
nH
0402
Murata LQG series
Output Matching/DC Block
R1
39
kΩ
0402
Various
Base current settings
R2
0
Ω
0402
Various
Jumper
R3
5.1
Ω
0402
Various
Collector current settings
R4
7.5
Ω
0402
Various
Output Matching/ Stability improvement
M1
Q
Manufacturer
0.2x0.6mm
BFP740FESD
Application Note AN189, Rev. 1.0
TSFP-4
Comment
Emitter degeneration FR4 substrate
Infineon Technologies SiGe C: bipolar transistor
8 / 22
2010-10-15
BFP740FESD
Dual Band LNA for WiMAX/WLAN 2.3-2.7GHz and 5-6GHz applications
Typical Measurement Results
4
Typical Measurement Results
Table 3
Summary of Measurement results for WiMAX/WLAN 2.3-2.7GHz (at room temperature)
Vcc=2.8V, Ic=13mA, freq=2300…2700MHz
Parameter
Symbol
Value
Unit
Frequency Range
Freq
2300…2700
MHz
DC Voltage
Vcc
2.8
V
DC Current
Icc
13.0
mA
Gain
G
14.0
dB
Noise Figure
NF
1.2
dB
Input Return Loss
RLin
9.0
dB
Output Return Loss
RLout
9.0
dB
Reverse Isolation
IRev
29.0
dB
Input P1dB
IP1dB
-15.5
dBm
Output P1dB
OP1dB
-3.0
dBm
Input IP3
IIP3
-9.0
dBm
Output IP3
OIP3
5.0
dBm
Switching Time
TsMax
540
ns
Maximum time between rise and fall time
Stability
k
>1
--
Unconditionnally stable from 0 to 10 GHz
Table 4
Comment/Test Condition
Input power Pin=-30 dBm
Pin=-30..0dBm. measured @2.4GHz
Pin=-40 dBm, f1=2400 MHz, f2=2401 MHz
Summary of Measurement results for WiMAX/WLAN 5-6GHz (at room temperature)
Vcc=2.8V, Ic=13mA, freq=5000…6000MHz
Parameter
Symbol
Value
Unit
Comment/Test Condition
Frequency Range
Freq
5000…6000
MHz
DC Voltage
Vcc
2.8
V
DC Current
Icc
13.0
mA
Gain
G
12.0
dB
Noise Figure
NF
1.4
dB
Input Return Loss
RLin
9.0
dB
Output Return Loss
RLout
9.0
dB
Reverse Isolation
IRev
22.0
dB
Input P1dB
IP1dB
-5.5
dBm
Output P1dB
OP1dB
-6.5
dBm
Input IP3
IIP3
6.0
dBm
Output IP3
OIP3
18.0
dBm
Switching time
TsMax
540
ns
Maximum time between rise and fall time
Stability
k
>1
--
Unconditionnally stable from 0 to 10 GHz
Input power Pin=-30 dBm
Pin=-30…0 dBm. measured @5.5GHz
Pin=-30 dBm, f1=5500 MHz, f2=5501 MHz
Note: the measurements showed in Table 3 and Table 4 are excluding the PCB and SMA losses of 0.20dB.
Application Note AN189, Rev. 1.0
9 / 22
2010-10-15
BFP740FESD
Dual Band LNA for WiMAX/WLAN 2.3-2.7GHz and 5-6GHz applications
Measured graphs from 2.3 to 2.7GHz
5
Measured graphs from 2.3 to 2.7GHz
Insertion Power Gain InBand
30
25
2300 MHz
15.66 dB
2700 MHz
17.1 dB
20
15
2400 MHz
13.86 dB
10
5
0
0
Figure 4
1000
2000
3000
4000 5000 6000
Frequency (MHz)
7000
8000
9000 10000
Insertion power gain of the BFP740FESD for WLAN/Wimax at 2.3-2.7GHz
Noise figure
1.5
NF(dB)
1.4
1.3
2300 MHz
1.24 dB
2400 MHz
1.187 dB
2700 MHz
1.051 dB
1.2
1.1
1
2300
Figure 5
2400
2500
Frequency (MHz)
2600
2700
Noise figure of the BFP740FESD for WLAN/Wimax at 2.3-2.7GHz
Application Note AN189, Rev. 1.0
10 / 22
2010-10-15
BFP740FESD
Dual Band LNA for WiMAX/WLAN 2.3-2.7GHz and 5-6GHz applications
Measured graphs from 2.3 to 2.7GHz
Input Matching
0
-5
-10
2700 MHz
-9.382 dB
2300 MHz
-16.87 dB
-15
-20
2400 MHz
-23.46 dB
-25
-30
0
Figure 6
1000
2000
3000
4000 5000 6000
Frequency (MHz)
7000
8000
9000 10000
Input matching of the BFP740FESD for WLAN/Wimax at 2.3-2.7GHz
Output Matching
0
2400 MHz
-10.21 dB
-5
2600 MHz
-9.22 dB
2700 MHz
-9.546 dB
-10
2300 MHz
-10.43 dB
-15
-20
0
Figure 7
1000
2000
3000
4000 5000 6000
Frequency (MHz)
7000
8000
9000 10000
Output matching of the BFP740FESD for WLAN/Wimax at 2.3-2.7GHz
Application Note AN189, Rev. 1.0
11 / 22
2010-10-15
BFP740FESD
Dual Band LNA for WiMAX/WLAN 2.3-2.7GHz and 5-6GHz applications
Measured graphs from 2.3 to 2.7GHz
Reverse Isolation
40
35
30
2700 MHz
28.97 dB
25
2300 MHz
32.89 dB
20
15
2400 MHz
34.06 dB
10
5
0
0
Figure 8
1000
2000
3000
4000 5000 6000
Frequency (MHz)
7000
8000
9000 10000
Reverse Isolation of the BFP740FESD for WLAN/Wimax at 2.3-2.7GHz
Compression point at 1dB
20
-27 dBm
13.52 dB
-15.51 dBm
12.52 dB
Gain(dB)
15
10
5
0
-27
Figure 9
-22
-17
-12
Pin (dBm)
-7
-2
0
Input 1dB compression point of the BFP740FESD for WLAN/Wimax at 2.3-2.7GHz
Application Note AN189, Rev. 1.0
12 / 22
2010-10-15
BFP740FESD
Dual Band LNA for WiMAX/WLAN 2.3-2.7GHz and 5-6GHz applications
Measured graphs from 2.3 to 2.7GHz
Figure 10
rd
Output 3 order Intercept point of the BFP740FESD for WLAN/Wimax at 2.3-2.7GHz
0.8
2.
0
6
0.
Swp Max
2700MHz
2700 MHz
r 1.14525
x 0.769949
0
3.
2300 MHz
r 0.788116
x 0.14567
10.0
2700 MHz
r 0.925671
x -0.690647
2
-0.
-4
.0
-5.
0
-3
.0
.0
-2
-1.0
-0.8
-0
.6
.4
-0
Figure 11
10.0
5.0
4.0
3.0
1.0
0.8
0.6
0.4
0
0.2
0.2
2300 MHz
r 0.569465
x 0.0763821
5.0
2400 MHz
r 0.94234
x 0.117206
2.0
0.
4
2400 MHz
r 0.563926
x 0.25122
0
4.
-10.0
Z11
Z22
1.0
Z Parameters Input output matching
Swp Min
2300MHz
Input and Output impedance of the BFP740FESD for WLAN/Wimax at 2.3-2.7GHz
Application Note AN189, Rev. 1.0
13 / 22
2010-10-15
BFP740FESD
Dual Band LNA for WiMAX/WLAN 2.3-2.7GHz and 5-6GHz applications
Measured graphs from 5.0 to 6.0GHz
6
Measured graphs from 5.0 to 6.0GHz
Insertion Power Gain InBand
30
25
5000 MHz
14.31 dB
5500 MHz
13.33 dB
20
15
6000 MHz
12.33 dB
10
5
0
0
Figure 12
1000
2000
3000
4000 5000 6000
Frequency (MHz)
7000
8000
9000 10000
Insertion power gain of the BFP740FESD for WLAN/Wimax at 5-6GHz
Noise figure
1.5
NF(dB)
1.4
6000 MHz
1.362 dB
1.3
1.2
5000 MHz
1.019 dB
5500 MHz
1.1195 dB
1.1
1
5000 5100 5200 5300 5400 5500 5600 5700 5800 5900 6000
Frequency (MHz)
Figure 13
Noise figure of the BFP740FESD for WLAN/Wimax at 5-6GHz
Application Note AN189, Rev. 1.0
14 / 22
2010-10-15
BFP740FESD
Dual Band LNA for WiMAX/WLAN 2.3-2.7GHz and 5-6GHz applications
Measured graphs from 5.0 to 6.0GHz
Input Matching
0
-5
-10
5000 MHz
-8.681 dB
5500 MHz
-9.713 dB
6000 MHz
-10.31 dB
-15
-20
0
Figure 14
1000
2000
3000
4000 5000 6000
Frequency (MHz)
7000
8000
9000 10000
Input matching of the BFP740FESD for WLAN/Wimax at 5-6GHz
Output Matching
0
6000 MHz
-9.329 dB
-5
5000 MHz
-19.77 dB
-10
-15
5500 MHz
-12.97 dB
-20
-25
-30
0
Figure 15
1000
2000
3000
4000 5000 6000
Frequency (MHz)
7000
8000
9000 10000
Output matching of the BFP740FESD for WLAN/Wimax at 5-6GHz
Application Note AN189, Rev. 1.0
15 / 22
2010-10-15
BFP740FESD
Dual Band LNA for WiMAX/WLAN 2.3-2.7GHz and 5-6GHz applications
Measured graphs from 5.0 to 6.0GHz
Reverse Isolation
40
35
30
25
20
15
5000 MHz
23.38 dB
10
6000 MHz
22.21 dB
5500 MHz
22.75 dB
5
0
0
Figure 16
1000
2000
3000
4000 5000 6000
Frequency (MHz)
7000
8000
9000 10000
Reverse isolation of the BFP740FESD for WLAN/Wimax at 5-6GHz
Compression point at 1dB
20
-27 dBm
13.03 dB
Gain(dB)
15
-5.688 dBm
12.03 dB
10
5
0
-27
Figure 17
-22
-17
-12
Pin (dBm)
-7
-2
0
Input 1dB compression point of the BFP740FESD for WLAN/Wimax at 5-6GHz
Application Note AN189, Rev. 1.0
16 / 22
2010-10-15
BFP740FESD
Dual Band LNA for WiMAX/WLAN 2.3-2.7GHz and 5-6GHz applications
Measured graphs from 5.0 to 6.0GHz
Figure 18
rd
Output 3 order intercept point of the BFP740FESD for WLAN/Wimax at 5-6GHz
0.8
2.
0
6
0.
5500 MHz
r 0.583811
x 0.325768
6000 MHz
r 0.741087
x 0.486831
0
3.
0
4.
10.0
10.0
5.0
4.0
3.0
2.0
1.0
0.8
0.6
0.4
0.2
0.2
5000 MHz
r 1.15869
x 0.138582
2
-0.
5500 MHz
r 1.43177
x 0.332155
-3
.0
.0
-2
-1.0
-0.8
-0
.6
.4
-0
Figure 19
5.0
6000 MHz
r 1.83498
x 0.523724
5000 MHz
r 0.477795
x 0.163771
4
.0
-5.
0
0.
4
0
Swp Max
6000MHz
-10.0
Z11
Z22
1.0
Z Parameters Input output matching
Swp Min
5000MHz
Input and Output impedance of the BFP740FESD for WLAN/Wimax at 5-6GHz
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BFP740FESD
Dual Band LNA for WiMAX/WLAN 2.3-2.7GHz and 5-6GHz applications
Measured graphs from 5.0 to 6.0GHz
Stability K Factor
10
9
8
7
6
5
4
3088.2 MHz
1.092
3
2
1
0
0
Figure 20
2000
4000
6000
Frequency (MHz)
8000
10000
K-factor stability of the BFP740FESD for WLAN/Wimax 2.3-2.7&5-6GHz applications
Stability Mu factor
Mu2 factor
5
Mu1 factor
4
3
2
1
0
0
Figure 21
2000
4000
6000
Frequency (MHz)
8000
10000
µ-factor stability of the BFP740FESD for WLAN/Wimax 2.3-2.7&5-6GHz applications
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2010-10-15
BFP740FESD
Dual Band LNA for WiMAX/WLAN 2.3-2.7GHz and 5-6GHz applications
Measured graphs from 5.0 to 6.0GHz
Figure 22
Rise switching time of the BFP740FESD for WLAN/Wimax 2.3-2.7&5-6GHz applications
Figure 23
Fall switching time of the BFP740FESD for WLAN/Wimax 2.3-2.7&5-6GHz applications
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BFP740FESD
Dual Band LNA for WiMAX/WLAN 2.3-2.7GHz and 5-6GHz applications
Evaluation Board and layout Information
7
Evaluation Board and layout Information
Figure 24
PCB Picture of Evaluation Board
Figure 25
PCB Layer Information
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2010-10-15
BFP740FESD
Dual Band LNA for WiMAX/WLAN 2.3-2.7GHz and 5-6GHz applications
Authors
Authors
Anthony Thomas, RF Application Engineer of Business Unit “RF and Protection Devices”
Dietmar Stolz, Staff engineer of Business Unit “RF and Protection Devices”
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Published by Infineon Technologies AG
AN189