bgm1043n7 front-end module for global navigation satellite
TRANSCRIPT
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RF and Protect ion Devices
BGM1043N7
Appl icat ion Note AN294 Revision: Rev. 1.0
2012-07-23
Front-End Module for Global Navigat ion Satel l i te Systems (GNSS) Appl icat ions with higher LTE Band-13 reject ion using 0402 components
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Edition 2012-07-23
Published by Infineon Technologies AG 81726 Munich, Germany
© 2012 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.
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BGM1043N7 Low-Noise FEM for GPS Applications
Application Note AN294, Rev. 1.0 2012-07-23 3 / 23
Application Note AN294
Revision History: 2012-07-23
Previous Revision: None
Page Subjects (major changes since last revision)
Trademarks of Infineon Technologies AG
AURIX™, C166™, CanPAK™, CIPOS™, CIPURSE™, EconoPACK™, CoolMOS™, CoolSET™, CORECONTROL™, CROSSAVE™, DAVE™, DI-POL™, EasyPIM™, EconoBRIDGE™, EconoDUAL™, EconoPIM™, EconoPACK™, EiceDRIVER™, eupec™, FCOS™, HITFET™, HybridPACK™, I²RF™, ISOFACE™, IsoPACK™, MIPAQ™, ModSTACK™, my-d™, NovalithIC™, OptiMOS™, ORIGA™, POWERCODE™, PRIMARION™, PrimePACK™, PrimeSTACK™, PRO-SIL™, PROFET™, RASIC™, ReverSave™, SatRIC™, SIEGET™, SINDRION™, SIPMOS™, SmartLEWIS™, SOLID FLASH™, TEMPFET™, thinQ!™, TRENCHSTOP™, TriCore™.
Other Trademarks
Advance Design System™ (ADS) of Agilent Technologies, AMBA™, ARM™, MULTI-ICE™, KEIL™, PRIMECELL™, REALVIEW™, THUMB™, µVision™ of ARM Limited, UK. AUTOSAR™ is licensed by AUTOSAR development partnership. Bluetooth™ of Bluetooth SIG Inc. CAT-iq™ of DECT Forum. COLOSSUS™, FirstGPS™ of Trimble Navigation Ltd. EMV™ of EMVCo, LLC (Visa Holdings Inc.). EPCOS™ of Epcos AG. FLEXGO™ of Microsoft Corporation. FlexRay™ is licensed by FlexRay Consortium. HYPERTERMINAL™ of Hilgraeve Incorporated. IEC™ of Commission Electrotechnique Internationale. IrDA™ of Infrared Data Association Corporation. ISO™ of INTERNATIONAL ORGANIZATION FOR STANDARDIZATION. MATLAB™ of MathWorks, Inc. MAXIM™ of Maxim Integrated Products, Inc. MICROTEC™, NUCLEUS™ of Mentor Graphics Corporation. MIPI™ of MIPI Alliance, Inc. MIPS™ of MIPS Technologies, Inc., USA. muRata™ of MURATA MANUFACTURING CO., MICROWAVE OFFICE™ (MWO) of Applied Wave Research Inc., OmniVision™ of OmniVision Technologies, Inc. Openwave™ Openwave Systems Inc. RED HAT™ Red Hat, Inc. RFMD™ RF Micro Devices, Inc. SIRIUS™ of Sirius Satellite Radio Inc. SOLARIS™ of Sun Microsystems, Inc. SPANSION™ of Spansion LLC Ltd. Symbian™ of Symbian Software Limited. TAIYO YUDEN™ of Taiyo Yuden Co. TEAKLITE™ of CEVA, Inc. TEKTRONIX™ of Tektronix Inc. TOKO™ of TOKO KABUSHIKI KAISHA TA. UNIX™ of X/Open Company Limited. VERILOG™, PALLADIUM™ of Cadence Design Systems, Inc. VLYNQ™ of Texas Instruments Incorporated. VXWORKS™, WIND RIVER™ of WIND RIVER SYSTEMS, INC. ZETEX™ of Diodes Zetex Limited.
Last Trademarks Update 2011-11-11
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BGM1043N7 Low-Noise FEM for GPS Applications
List of Content, Figures and Tables
Application Note AN294, Rev. 1.0 2012-07-23 4 / 23
Table of Content
1 BGM1043N7 GPS and GLONASS Front-End Module ..................................................................... 5
2 Introduction ........................................................................................................................................ 6
3 Description .......................................................................................................................................... 8
4 Application Circuit and Block Diagram ........................................................................................... 9
5 Measurement Results ...................................................................................................................... 10
6 Measured Graphs for GPS and GLONASS Bands ........................................................................ 12
7 Miscellaneous Measured Graphs ................................................................................................... 18
8 Evaluation Board and Layout Information .................................................................................... 21
9 Authors .............................................................................................................................................. 22
List of Figures
Figure 1 BGM1043N7 in TSNP-7-10 Package................................................................................................... 5 Figure 2 RF System Overview: Mobile Phone ................................................................................................... 6 Figure 3 GNSS system with integrated GNSS FEM BGM1043N7 for mobile/portable and personal navigation
devices ................................................................................................................................................. 7 Figure 4 Block Diagram of BGM1043N7 ............................................................................................................ 8 Figure 5 Schematic diagram of the BGM1043N7 application circuit .................................................................. 9 Figure 6 Wideband Insertion Power Gain of BGM1043N7 .............................................................................. 12 Figure 7 Narrowband Insertion Power Gain of BGM1043N7 for GPS and GLONASS bands ......................... 12 Figure 8 Input Matching of BGM1043N7 for GPS and GLONASS bands ....................................................... 13 Figure 9 Output Matching of BGM1043N7 for GPS and GLONASS bands ..................................................... 13 Figure 10 Reverse Isolation of BGM1043N7 for GPS and GLONASS bands ................................................... 14 Figure 11 Noise Figure of BGM1043N7 for GPS and GLONASS bands ........................................................... 14 Figure 12 Input 1dB Compression Point of BGM1043N7 at supply voltage of 1.8V for GPS band ................... 15 Figure 13 Input 1dB Compression Point of BGM1043N7 at supply voltage of 2.8V for GPS band ................... 15 Figure 14 Carrier and intermodulation products of BGM1043N7 for GPS band at Vcc=1.8V ........................... 16 Figure 15 Carrier and intermodulation products of BGM1043N7 for GPS band at Vcc=2.8V ........................... 16 Figure 16 Carrier and intermodulation products of BGM1043N7 for GLONASS band at Vcc=1.8V ................. 17 Figure 17 Carrier and intermodulation products of BGM1043N7 for GLONASS band at Vcc=2.8V ................. 17 Figure 18 Input and Output Matching of BGM1043N7 for GPS and GLONASS bands with Vcc=1.8V ............ 18 Figure 19 Input and Output Matching of BGM1043N7 for GPS and GLONASS bands with Vcc=2.8V ............ 18 Figure 20 Stability Factor K of BGM1043N7 upto 10 GHz ................................................................................. 19 Figure 21 Stability Factor µ1 of BGM1043N7 upto 10 GHz ............................................................................... 19 Figure 22 Stability Factor µ2 of BGM1043N7 upto 10 GHz ............................................................................... 20 Figure 23 Picture of Evaluation Board for BGM1043N7 .................................................................................... 21 Figure 24 PCB Layer Information ....................................................................................................................... 21
List of Tables
Table 1 Pin Assignment of BGM1043N7 .......................................................................................................... 9 Table 2 Bill-of-Materials ..................................................................................................................................... 9 Table 3 Electrical Characteristics (at room temperature), Vcc = Vpon = 1.8 V .............................................. 10 Table 4 Electrical Characteristics (at room temperature), Vcc = Vpon = 2.8 V .............................................. 11
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BGM1043N7 Low-Noise FEM for GPS Applications
BGM1043N7 GPS and GLONASS Front-End Module
Application Note AN294, Rev. 1.0 2012-07-23 5 / 23
1 BGM1043N7 GPS and GLONASS Front-End Module
1.1 Features
Operating frequency: 1575.42 MHz and 1598.06-
1605.38 MHz
High Gain: 15.1 dB
Low Noise Figure (GPS): 1.5 dB
Low current consumption: 4.0 mA
Out-of-band rejection in cellular bands: > 43 dBc
Input compression point in cellular bands: 30 dBm
Supply voltage: 1.5 V to 3.6 V
Tiny TSNP-7-10 leadless package (2.3 x 1.7 x 0.73 mm3)
RF output internally matched to 50 Ω
IEC ESD contact discharge of RF input pin: 6 kV
Only 3 external SMD parts
RoHS compliant package (Pb-free)
Figure 1 BGM1043N7 in TSNP-7-10 Package
1.2 Applications
- GPS (Global Positioning System) working in the L1 band at 1575.42 MHz
- GLONASS (Globalnaya Navigatsionnaya Sputnikovaya Sistema) working in the L1 band from 1598.06 MHz to 1605.38 MHz
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BGM1043N7 Low-Noise FEM for GPS Applications
Introduction
Application Note AN294, Rev. 1.0 2012-07-23 6 / 23
2 Introduction
Global Navigation Satellite System or GNSS receiver, as we know, works on the reception of location based
information from satellite signals. There are several standards worldwide like GPS, GLONASS, Galileo and
COMPASS Bei Du. However, the power levels of the satellite signals received, can be lower than -130 dBm.
This poses a challenge on the sensitivity of the GNSS receiver. Along with this, the ever growing disturbing or
jamming signals in the adjacent cellular bands makes the design of the receiver front-end even more difficult.
The rapidly growing market for GNSS systems is driving the design of advanced and high-performance GNSS
receivers. A simple overview of the GNSS RF system in a mobile phone or other handheld devices is shown in
Figure 2.
Figure 2 RF System Overview: Mobile Phone
GNSS receivers for mobile or handheld applications are always under the threat of high power cellular signals.
Due to the coexistence of GNSS and Cellular services, there is a strong coupling of the DCS/PCS and Cellular
signals to the GNSS receiver. The performance of a standard integrated GNSS receiver chip cannot meet the
specifications required for the present systems. An external RF front-end is essential to achieve this required
performance. The most important prerequisites for the front-end of a GNSS receiver are low noise figure and
sufficient amplification of the desired signal together with high attenuation of the jamming signals.
Blocking Signal ESD
protection
Int.
LNA
GNSS
Receiver IC
GNSS Signal < -130dBm
Tx Signal
Satellite GNSS
signal
GNSS RF
Front-end
module
Tranceiver moduleGSM800/GSM900/
DCS/PCS1800/
UMTS/
WLAN
Mobile Phone / Handheld device
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BGM1043N7 Low-Noise FEM for GPS Applications
Application Note AN294, Rev. 1.0 2012-07-23 7 / 23
2.1 Systems overview of a GNSS receiver
Several configurations can be adopted for a GNSS receiver chain. In all configurations, as mentioned earlier, a
RF front-end like BGM1043N7 is placed between the antenna and the GNSS receiver chip. Mobile/portable
devices as well as personal navigation devices request decreasing form factor used by the implementation of
the GNSS function in the devices. BGM1043N7 supports the designers to minimize the area in the front-end.
Such a configuration is shown in Figure 3. The BGM1043N7 can also be used for the active antenna module.
Figure 3 GNSS system with integrated GNSS FEM BGM1043N7 for mobile/portable and personal navigation devices
BPF
GNSS Receiver
IC
Embedded ANT
LNA
BGM1043N7
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BGM1043N7 Low-Noise FEM for GPS Applications
Description
Application Note AN294, Rev. 1.0 2012-07-23 8 / 23
3 Description
The BGM1043N7 is a combination of a low-insertion-loss pre-filter with Infineon’s high performance low noise
amplifier (LNA) for Global Positioning System (GPS) and Globalnaya Navigatsionnaya Sputnikovaya Sistema
(GLONASS) applications. Both, GPS and GLONASS frequency bands, can be used at the same time. Through
the low insertion loss of the filter, the BGM1043N7 provides 15.1 dB gain, 1.5 dB noise figure and high linearity
performance. In addition BGM1043N7 provides very high out-of-band attenuation in conjunction with a high
input compression point. It can withstand IEC61000-4-2 ESD contact discharge at the RF input as high as 6 kV
in the application circuit shown in Figure 5. Its current consumption is as low as 4.0 mA. It operates over the 1.5
V to 3.6 V supply voltage range.
Figure 4 Block Diagram of BGM1043N7
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BGM1043N7 Low-Noise FEM for GPS Applications
Application Circuit and Block Diagram
Application Note AN294, Rev. 1.0 2012-07-23 9 / 23
4 Application Circuit and Block Diagram
The BGM1043N7 is internally matched at the output to 50 Ohm. The LNA bias circuitry is also integrated on
chip. Therefore, only three external components are required in the application. The application schematic is
shown in Figure 5 and the function of the external passives is listed in Table 2.
4.1 Application Schematic
Figure 5 Schematic diagram of the BGM1043N7 application circuit
Table 1 Pin Assignment of BGM1043N7
Pin No. Symbol Function
1 VCC Power Supply
2 PON Power ON/OFF
3 RFIN RF Input
4 SO Pre-Filter Output
5 AI LNA Input
6 RFOUT RF Output
7 GND DC and RF ground
Table 2 Bill-of-Materials
Symbol Value Unit Size Manufacturer Comment
C1 1.0 µF 0402 Various Supply filtering
C3 6.2 pF 0402 Various 787MHz Optimization
L1 5.8 nH 0402 Murata LQW Series Matching/ESD protection Inductor
L2 7.5 nH 0402 Murata LQW Series Matching Inductor
L3 7.3 nH 0402 Murata LQW Series 787MHz Optimization
Q1 BGM1043N7 TSNP-7-10 Infineon GPS/GLONASS FEM
Q1 BGM1043N7
(Topview)
RFOUT
SO
L2
7.5 nH
AI7 GND
1
2
3
6
5
4
VCC
C1
1 µF
PON
L1
5.8 nH
RFIN
L3
7.3 nH
C3
6.2 pF
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BGM1043N7 Low-Noise FEM for GPS Applications
Measurement Results
Application Note AN294, Rev. 1.0 2012-07-23 10 / 23
5 Measurement Results
Measurement results of the BGM1043N7 are presented in this section. The measurements are performed on
the Infineon application board at room temperature. The performances of the BGM1043N7 are here provided for
the voltage of 1.8V (Table 3) and 2.8V (Table 4). The data exclude PCB and SMA connector losses, unless
otherwise mentioned.
Table 3 Electrical Characteristics (at room temperature), Vcc = Vpon = 1.8 V
Parameter Symbol Value Unit Comment/Test Condition
DC Voltage Vcc 1.8 V
DC Current Icc 4.0 mA
Navigation System Sys GPS GLONASS
Frequency Range Freq 1575.42 1598-1606 MHz
Gain G 14.7 14.2 dB
Noise Figure NF 1.56 1.87 dB PCB and SMA connectors of 0.1 dB losses substracted
Input Return Loss RLin 12.3 15.4 dB
Output Return Loss RLout 24.3 24.0 dB
Reverse Isolation IRev 21.4 21.9 dB
Input P1dB IP1dB -8.38 -7.2 dBm fgps = 1575.42 MHz
f GLONASS = 1605 MHz
Output P1dB OP1dB 5.32 6.0 dBm
Input IP3
In-band IIP3 -6.8 -5.5 dBm
Output IP3
In-band OIP3 7.9 8.7 dBm
f1gps = 1575 MHz, f2gps = 1576MHz
f1GLONASS =1602 MHz, f2GLONASS =1603 MHz
P1IN = P2IN = -30 dBm
Rejection 750MHz1) Rej750M 70.1 dBc f = 750 MHz
Rejection 900MHz1) Rej900M 52.3 dBc f = 806 MHz - 928 MHz
Rejection 1800MHz1)
Rej1800M 43.0
dBc f = 1710 MHz - 1980 MHz
Rejection 2400MHz1)
Rej2400M 49.8
dBc f = 2400 MHz - 2500 MHz
Input P1dB IP1dB900M 29.0 dBm f = 900 MHz
Input P1dB IP1dB1710M 31.5 dBm f = 1710 MHz
LTE band-13 2nd
Harmonic
H2 -83.8 dBm fIN = 787.76 MHz, PIN = +15 dBm;
fH2 = 1575.52 MHz
Input IP3
out-of-band IIP3OOB 63.5 dBm
f1 = 1712.7 MHz, f2 = 1850 MHz
P1IN = +10 dBm, P2IN = +10 dBm;
fIIP3 = 1575.4 MHz
Stability k >1 -- Unconditionnally Stable from 0 to 10GHz
1) Rejection is defined as following: [Gain at 1575.42 MHz] – [Attenuation@stopband frequency]
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BGM1043N7 Low-Noise FEM for GPS Applications
Measurement Results
Application Note AN294, Rev. 1.0 2012-07-23 11 / 23
Table 4 Electrical Characteristics (at room temperature), Vcc = Vpon = 2.8 V
Parameter Symbol Value Unit Comment/Test Condition
DC Voltage Vcc 2.8 V
DC Current Icc 4.1 mA
Navigation System Sys GPS GLONASS
Frequency Range Freq 1575.42 1598-1606 MHz
Gain G 14.8 14.3 dB
Noise Figure NF 1.57 1.9 dB PCB and SMA connectors of 0.12 dB losses substracted
Input Return Loss RLin 12.8 16.5 dB
Output Return Loss RLout 23.3 23.2 dB
Reverse Isolation IRev 21.8 22.3 dB
Input P1dB IP1dB -6.47 -5.2 dBm fgps = 1575.42 MHz
f GLONASS = 1605 MHz
Output P1dB OP1dB 7.33 8.1 dBm
Input IP3
In-band IIP3 -6.7 -5.4 dBm
Output IP3
In-band OIP3 8.1 8.9 dBm
f1gps = 1575 MHz, f2gps = 1576MHz
f1GLONASS =1602 MHz, f2GLONASS =1603 MHz
Input power= -30 dBm
Rejection 750MHz1) Rej750M 70.2 dBc f = 750 MHz
Rejection 900MHz1) Rej900M 52.4 dBc f = 806 MHz - 928 MHz
Rejection 1800MHz1)
Rej1800M 43.0
dBc f = 1710 MHz - 1980 MHz
Rejection 2400MHz1)
Rej2400M 49.9
dBc f = 2400 MHz - 2500 MHz
Input P1dB IP1dB900M 30.0 dBm f = 900 MHz
Input P1dB IP1dB1710M 32.0 dBm f = 1710 MHz
LTE band-13 2nd
Harmonic
H2 -84.0 dBm fIN = 787.76 MHz, PIN = +15 dBm;
fH2 = 1575.52 MHz
Input IP3
out-of-band IIP3OOB 63.6 dBm
f1 = 1712.7 MHz, f2 = 1850 MHz
P1IN = +10 dBm, P2IN = +10 dBm;
fIIP3 = 1575.4 MHz
Stability k >1 -- Unconditionnally Stable from 0 to 10GHz
1)
Rejection is defined as following: [Gain at 1575.42 MHz] – [Attenuation@stopband frequency]
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BGM1043N7 Low-Noise FEM for GPS Applications
Measured Graphs for GPS and GLONASS Bands
Application Note AN294, Rev. 1.0 2012-07-23 12 / 23
6 Measured Graphs for GPS and GLONASS Bands
Figure 6 Wideband Insertion Power Gain of BGM1043N7
Figure 7 Narrowband Insertion Power Gain of BGM1043N7 for GPS and GLONASS bands
0 500 1000 1500 2000 2500 3000 3500 4000 4500 5000 5500 6000
Frequency (MHz)
Gain
-70
-60
-50
-40
-30
-20
-10
0
10
20
S2
1 (
dB
)
787.76 MHz-64.8 dB
1575.4 MHz14.8 dB
Gain at Vcc=1.8V
Gain at Vcc=2.8V
1500 1525 1550 1575 1600 1625 1650
Frequency (MHz)
Narrowband gain
13
13.6
14.2
14.8
15.4
16
S2
1 (
dB
)
1605.4 MHz14.2 dB
1605.4 MHz14.3 dB
1575.4 MHz14.8 dB
1575.4 MHz14.7 dB
Gain at Vcc=1.8V
Gain at Vcc=2.8V
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BGM1043N7 Low-Noise FEM for GPS Applications
Measured Graphs for GPS and GLONASS Bands
Application Note AN294, Rev. 1.0 2012-07-23 13 / 23
Figure 8 Input Matching of BGM1043N7 for GPS and GLONASS bands
Figure 9 Output Matching of BGM1043N7 for GPS and GLONASS bands
1500 1525 1550 1575 1600 1625 1650
Frequency (MHz)
Input matching
-35
-30
-25
-20
-15
-10
-5
0
S1
1 (
dB
)
1605.4 MHz-16.5 dB
1605.4 MHz-15.4 dB
1575.4 MHz-12.8 dB
1575.4 MHz-12.3 dB
S11 at Vcc=1.8V
S11 at Vcc=2.8V
1500 1525 1550 1575 1600 1625 1650
Frequency (MHz)
Output matching
-35
-30
-25
-20
-15
-10
-5
0
S2
2 (
dB
)
1605.4 MHz-23.2 dB
1605.4 MHz-24 dB
1575.4 MHz-23.3 dB
1575.4 MHz-24.3 dB
S22 at Vcc=1.8V
S22 at Vcc=2.8V
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BGM1043N7 Low-Noise FEM for GPS Applications
Measured Graphs for GPS and GLONASS Bands
Application Note AN294, Rev. 1.0 2012-07-23 14 / 23
Figure 10 Reverse Isolation of BGM1043N7 for GPS and GLONASS bands
Figure 11 Noise Figure of BGM1043N7 for GPS and GLONASS bands
1500 1525 1550 1575 1600 1625 1650
Frequency (MHz)
Isolation
-27
-25
-23
-21
-19
-17
S1
2 (
dB
)
1605.4 MHz-22.3 dB
1605.4 MHz-21.9 dB
1575.4 MHz-21.8 dB
1575.4 MHz-21.4 dB
S12 at Vcc=1.8V
S12 at Vcc=2.8V
1559 1567 1575 1583 1591 1599 1607 1615
Frequency (MHz)
Noise figure
1
1.2
1.4
1.6
1.8
2
2.2
2.4
2.6
2.8
3
NF
(d
B)
1605.4 MHz1.87
1605.4 MHz1.9
1575.4 MHz1.56
1575.4 MHz1.57
NF at Vcc=1.8V
NF at Vcc=2.8V
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BGM1043N7 Low-Noise FEM for GPS Applications
Measured Graphs for GPS and GLONASS Bands
Application Note AN294, Rev. 1.0 2012-07-23 15 / 23
Figure 12 Input 1dB Compression Point of BGM1043N7 at supply voltage of 1.8V for GPS band
Figure 13 Input 1dB Compression Point of BGM1043N7 at supply voltage of 2.8V for GPS band
-30 -25 -20 -15 -10 -5 0
Power (dBm)
Compression point at 1dB with Vcc=1.8V
10
11
12
13
14
15
16
Ga
in (
dB
)
-8.38 dBm13.7 dB
-30 dBm14.7 dB
-30 -25 -20 -15 -10 -5 0
Power (dBm)
Compression point at 1dB with Vcc=2.8V
10
11
12
13
14
15
16
Ga
in (
dB
)
-6.47 dBm13.8 dB
-30 dBm14.8 dB
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BGM1043N7 Low-Noise FEM for GPS Applications
Measured Graphs for GPS and GLONASS Bands
Application Note AN294, Rev. 1.0 2012-07-23 16 / 23
Figure 14 Carrier and intermodulation products of BGM1043N7 for GPS band at Vcc=1.8V
Figure 15 Carrier and intermodulation products of BGM1043N7 for GPS band at Vcc=2.8V
1573 1574 1575 1576 1577 1578
Frequency (MHz)
Intermodulation for GPS band
-90
-80
-70
-60
-50
-40
-30
-20
-10
0
Po
we
r (d
Bm
)
1577 MHz-62.45
1574 MHz-63.62
1576 MHz-15.55
1575 MHz-15.48
1573 1574 1575 1576 1577 1578
Frequency (MHz)
Intermodulation for GPS band
-90
-80
-70
-60
-50
-40
-30
-20
-10
0
Po
we
r (d
Bm
)
1574 MHz-63.63
1577 MHz-62.58
1576 MHz-15.46
1575 MHz-15.39
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BGM1043N7 Low-Noise FEM for GPS Applications
Measured Graphs for GPS and GLONASS Bands
Application Note AN294, Rev. 1.0 2012-07-23 17 / 23
Figure 16 Carrier and intermodulation products of BGM1043N7 for GLONASS band at Vcc=1.8V
Figure 17 Carrier and intermodulation products of BGM1043N7 for GLONASS band at Vcc=2.8V
1600 1601 1602 1603 1604 1605
Frequency (MHz)
Intermodulation for GLONASS band
-90
-80
-70
-60
-50
-40
-30
-20
-10
0
Po
we
r (d
Bm
)
1601 MHz-65.18
1602 MHz-15.72
1604 MHz-64.63
1603 MHz-15.78
1600 1601 1602 1603 1604 1605
Frequency (MHz)
Intermodulation for GLONASS band
-90
-80
-70
-60
-50
-40
-30
-20
-10
0
Po
we
r (d
Bm
)
1604 MHz-64.74
1602 MHz-15.61
1603 MHz-15.67
1601 MHz-65.05
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BGM1043N7 Low-Noise FEM for GPS Applications
Miscellaneous Measured Graphs
Application Note AN294, Rev. 1.0 2012-07-23 18 / 23
7 Miscellaneous Measured Graphs
Figure 18 Input and Output Matching of BGM1043N7 for GPS and GLONASS bands with Vcc=1.8V
Figure 19 Input and Output Matching of BGM1043N7 for GPS and GLONASS bands with Vcc=2.8V
0 1.0
1.0
-1.0
10.0
10.0
-10.0
5.0
5.0
-5.0
2.0
2.0
-2.0
3.0
3.0
-3.0
4.0
4.0
-4.0
0.2
0.2
-0.2
0.4
0.4
-0.4
0.6
0.6
-0.6
0.8
0.8
-0.8
Input and Output matching with Vcc=1.8VSwp Max
1615MHz
Swp Min
1559MHz
1605.4 MHzr 1.29x -0.32
1605.4 MHzr 1.04x -0.00977
1575.4 MHzr 0.98x 0.0959
1575.4 MHzr 1.13x -0.529
Input
Output
0 1.0
1.0
-1.0
10.0
10.0
-10.0
5.0
5.0
-5.0
2.0
2.0
-2.0
3.0
3.0
-3.0
4.0
4.0
-4.0
0.2
0.2
-0.2
0.4
0.4
-0.4
0.6
0.6
-0.6
0.8
0.8
-0.8
Input and Output matching with Vcc=2.8VSwp Max
1615MHz
Swp Min
1559MHz
1605.4 MHzr 1.28x -0.285
1605.4 MHzr 1.03x 0.0419
1575.4 MHzr 0.958x 0.139
1575.4 MHzr 1.16x -0.501
Input
Output
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BGM1043N7 Low-Noise FEM for GPS Applications
Miscellaneous Measured Graphs
Application Note AN294, Rev. 1.0 2012-07-23 19 / 23
Figure 20 Stability Factor K of BGM1043N7 upto 10 GHz
Figure 21 Stability Factor µ1 of BGM1043N7 upto 10 GHz
0 1000 2000 3000 4000 5000 6000 7000 8000 9000 10000
Frequency (MHz)
Stability K factor
0
1
2
3
4
5
1575.4 MHz1.24
Stability K factor at Vcc=1.8V
Stability K factor at Vcc=2.8V
0 1000 2000 3000 4000 5000 6000 7000 8000 9000 10000
Frequency (MHz)
Stability Mu1 factor
0
1
2
3
4
5
1575.4 MHz1.64
Stability Mu1 factor at Vcc=1.8V
Stability Mu1 factor at Vcc=2.8V
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BGM1043N7 Low-Noise FEM for GPS Applications
Miscellaneous Measured Graphs
Application Note AN294, Rev. 1.0 2012-07-23 20 / 23
Figure 22 Stability Factor µ2 of BGM1043N7 upto 10 GHz
0 1000 2000 3000 4000 5000 6000 7000 8000 9000 10000
Frequency (MHz)
Stability Mu2 factor
0
1
2
3
1575.4 MHz1.42
Stability Mu2 factor at Vcc=1.8V
Stability Mu2 factor at Vcc=2.8V
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BGM1043N7 Low-Noise FEM for GPS Applications
Evaluation Board and Layout Information
Application Note AN294, Rev. 1.0 2012-07-23 21 / 23
8 Evaluation Board and Layout Information
In this application note, the following PCB is used:
PCB Marking: BGM1032N7 V3.0 M110416
PCB material: FR4
Figure 23 Picture of Evaluation Board for BGM1043N7
Figure 24 PCB Layer Information
Copper
35µm
FR4, 0.2mm
FR4, 0.8mm
Vias
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BGM1043N7 Low-Noise FEM for GPS Applications
Authors
Application Note AN294, Rev. 1.0 2012-07-23 22 / 23
9 Authors
Jagjit Singh Bal, Senior Application Engineer of Business Unit “RF and Protection Devices”
Dr. Chih-I Lin, Senior Staff Engineer of Business Unit “RF and Protection Devices”
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w w w . i n f i n e o n . c o m
Published by Infineon Technologies AG AN294