Infineon AppNote AN268 GPS GNSS Front End Module MMIC

B G M10 34 N7
High Gain Fro nt - En d Mod ule for Gl obal
Na vig atio n S atelli te S ys te m s (G N SS )
Applic atio n Usi ng L ow - Q In du c tors
Applic atio n N ote A N 268
Revision: Rev. 1.2
2012-05-05
RF and P r otecti on D evic es
Edition 2012-05-05
Published by
Infineon Technologies AG
81726 Munich, Germany
© 2012 Infineon Technologies AG
All Rights Reserved.
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BGM1034N7
FEM for GPS and GLONASS Applications using Low-Q Inductors
Application Note AN268
Revision History: 2012-05-05
Previous Revision: Rev. 1.1, 2011-09-16
Page
11-12
Subjects (major changes since last revision)
GLONASS measurement results added
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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
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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
Application Note AN268, Rev. 1.2
3 / 22
2012-05-05
BGM1034N7
FEM for GPS and GLONASS Applications using Low-Q Inductors
List of Content, Figures and Tables
Table of Content
1
BGM1034N7 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
Evaluation Board and layout Information ...................................................................................... 20
8
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
BGM1034N7 in TSNP-7-10 Package................................................................................................... 5
RF System Overview: Mobile Phone ................................................................................................... 6
GNSS system with integrated GNSS FEM BGM1034N7 for mobile/portable and personal navigation
devices ................................................................................................................................................. 7
Block Diagram of BGM1034N7 ............................................................................................................ 8
Schematic diagram of the BGM1034N7 application circuit .................................................................. 9
Power Gain of BGM1034N7 for GPS and GLONASS bands ............................................................ 12
Noise Figure of BGM1034N7 for GPS and GLONASS bands ........................................................... 12
Wideband Insertion Power Gain including out-of-band attenuation of the BGM1034N7................... 13
Input Matching of BGM1034N7 for GPS and GLONASS bands ....................................................... 13
Output Matching of BGM1034N7 for GPS and GLONASS bands ..................................................... 14
Reverse Isolation of BGM1034N7 for GPS and GLONASS bands ................................................... 14
Input 1dB Compression Point of BGM1034N7 at supply voltage of 1.8V for GPS and GLONASS
bands .................................................................................................................................................. 15
Input 1dB Compression Point of BGM1034N7 at supply voltage of 2.8V for GPS and GLONASS
bands .................................................................................................................................................. 15
Carrier and intermodulation products of BGM1034N7 for GPS band at Vcc=1.8V ........................... 16
Carrier and intermodulation products of BGM1034N7 for GPS band at Vcc=2.8V ........................... 16
Carrier and intermodulation products of BGM1034N7 for GLONASS band at Vcc=1.8V ................. 17
Carrier and intermodulation products of BGM1034N7 for GLONASS band at Vcc=2.8V ................. 17
Stability Factor K of BGM1034N7 for GPS and GLONASS applications........................................... 18
Stability Factor µ1 of BGM1034N7 for GPS and GLONASS applications ......................................... 18
Stability Factor µ2 of BGM1034N7 for GPS and GLONASS applications ......................................... 19
Picture of Evaluation Board M110718 V3.0 ....................................................................................... 20
PCB Layer Information ....................................................................................................................... 20
List of Tables
Table 1
Table 2
Table 3
Table 4
Pin Assignment of BGM1034N7 .......................................................................................................... 9
Bill-of-Materials..................................................................................................................................... 9
Electrical Characteristics (at room temperature), Vcc = Vpon = 1.8 V .............................................. 10
Electrical Characteristics (at room temperature), Vcc = Vpon = 2.8 V .............................................. 11
Application Note AN268, Rev. 1.2
4 / 22
2012-05-05
BGM1034N7
FEM for GPS and GLONASS Applications using Low-Q Inductors
BGM1034N7 GPS and GLONASS Front-End Module
1
BGM1034N7 GPS and GLONASS Front-End Module
1.1
Features












1.2
Operating frequency: 1575.42 MHz and 1598.061605.38 MHz
High Gain: 17.0 dB
Low Noise Figure (GPS): 1.7 dB
Low current consumption: 3.9 mA
Out-of-band rejection in cellular bands: > 43dBc
Input compression point in cellular bands: 22dBm
Supply voltage: 1.5 V to 3.6 V
3
Tiny TSNP-7-10 leadless package (2.3 x 1.7 x 0.73 mm )
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
BGM1034N7 in TSNP-7-10
Package
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
Application Note AN268, Rev. 1.2
5 / 22
2012-05-05
BGM1034N7
FEM for GPS and GLONASS Applications using Low-Q Inductors
Introduction
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.
Mobile Phone / Handheld device
Satellite GNSS
signal
Tranceiver module
GSM800/GSM900/
DCS/PCS1800/
UMTS/
WLAN
GNSS
Receiver IC
Figure 2
Int.
LNA
Tx Signal
GNSS Signal < -130dBm
GNSS RF
Front-end
module
ESD
protection
Blocking Signal
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.
Application Note AN268, Rev. 1.2
6 / 22
2012-05-05
BGM1034N7
FEM for GPS and GLONASS Applications using Low-Q Inductors
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 BGM1034N7 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. BGM1034N7 supports the designers to minimize the area in the front-end.
Such a configuration is shown in Figure 3. The BGM1034N7 can also be used for the active antenna module.
Embedded ANT
BGM1034N7
LNA
BPF
GNSS
Receiver
IC
Figure 3
GNSS system with integrated GNSS FEM BGM1034N7 for mobile/portable and personal
navigation devices
Application Note AN268, Rev. 1.2
7 / 22
2012-05-05
BGM1034N7
FEM for GPS and GLONASS Applications using Low-Q Inductors
Description
3
Description
The BGM1034N7 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 BGM1034N7 provides 17 dB gain, 1.7 dB noise figure and high linearity
performance. In addition BGM1034N7 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 4. Its current consumption is as low as 3.9 mA. It operates over the 1.5
V to 3.6 V supply voltage range.
Figure 4
Block Diagram of BGM1034N7
Application Note AN268, Rev. 1.2
8 / 22
2012-05-05
BGM1034N7
FEM for GPS and GLONASS Applications using Low-Q Inductors
Application Circuit and Block Diagram
4
Application Circuit and Block Diagram
The BGM1034N7 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 BGM1034N7 application circuit
Table 1
Pin Assignment of BGM1034N7
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 ground
Table 2
Bill-of-Materials
Symbol
Value
Unit
Size
C1
L1
0.1
µF
0402
Various
Supply filtering
8.2
nH
0402
Murata LQG series
Matching / ESD Inductor
L2
7.5
nH
0402
Murata LQG series
Matching Inductor
Q1
BGM1034N7
TSNP-7-10
Infineon
GPS/GLONASS FEM
Application Note AN268, Rev. 1.2
Manufacturer
9 / 22
Comment
2012-05-05
BGM1034N7
FEM for GPS and GLONASS Applications using Low-Q Inductors
Measurement Results
5
Measurement Results
Measurement results of the BGM1034N7 are presented in this section. The measurements are performed on
the Infineon application board at room temperature. The performances of the BGM1034N7 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
4.1
mA
Navigation System
Sys
GPS
GLONASS
Frequency Range
Freq
1575.42
1598-1606
MHz
Gain
G
17.0
16.8
dB
Noise Figure
NF
1.72
2.03
dB
RLin
17.2
14.3
dB
RLout
11.5
15.13
dB
IRev
33.9
34.8
dB
Input P1dB
IP1dB
-13.0
-13.4
dBm
Output P1dB
OP1dB
3
2.4
dBm
IIP3
-8.6
-8.4
dBm
8.4
f1gps = 1575.42 MHz, f2gps = 1576.42 MHz
dBm f1GLONASS =1603 MHz, f2GLONASS =1604 MHz
P1IN = P2IN = -30 dBm
Input Return Loss
Output Return Loss
Reverse Isolation
Input IP3 In-band
Output IP3
In-band
OIP3
Rejection 750MHz
Rejection 900MHz
1
1
8.4
PCB and SMA connectors of 0.1 dB losses
substracted
fgps = 1575.42 MHz
f GLONASS = 1605 MHz
Rej750M
56.1
dBc
f = 750 MHz
Rej900M
55.8
dBc
f = 806 MHz - 928 MHz
1
Rej1800M
49.7
dBc
f = 1710 MHz - 1980 MHz
1
Rej2400M
62.6
dBc
f = 2400 MHz - 2500 MHz
Input P1dB
IP1dB900M
22.0
dBm f = 900 MHz
Input P1dB
IP1dB1710M
26.0
dBm f = 1710 MHz
Input IP3
out-of-band
IIP3OOB
64.6
dBm
k
>1
Rejection 1800MHz
Rejection 2400MHz
Stability
1
--
f1 = 1712.7 MHz, f2 = 1850 MHz
P1IN = +10 dBm, P2IN = +10 dBm
Unconditionnally Stable from 0 to 10GHz
Rejection is defined as following: [Gain at 1575.42 MHz] – [Attenuation@stopband frequency
Application Note AN268, Rev. 1.2
10 / 22
2012-05-05
BGM1034N7
FEM for GPS and GLONASS Applications using Low-Q Inductors
Measurement Results
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
4.2
mA
Navigation System
Sys
GPS
GLONASS
Frequency Range
Freq
1575.42
1598-1606
MHz
Gain
G
16.9
16.8
dB
Noise Figure
NF
1.71
2.03
dB
RLin
17.2
14.3
dB
RLout
11.1
14.5
dB
IRev
33.9
34.8
dB
Input P1dB
IP1dB
-13.1
-12.7
dBm
Output P1dB
OP1dB
2.8
3.1
dBm
IIP3
-8.7
-8.6
dBm
8.2
f1gps = 1575.42 MHz, f2gps = 1576.42 MHz
dBm f1GLONASS =1603 MHz, f2GLONASS =1604 MHz
Input power= -30 dBm
Input Return Loss
Output Return Loss
Reverse Isolation
Input IP3 In-band
Output IP3
In-band
OIP3
Rejection 750MHz
Rejection 900MHz
1
1
8.2
PCB and SMA connectors of 0.1 dB losses
substracted
fgps = 1575.42 MHz
f GLONASS = 1605 MHz
Rej750M
56.2
dBc
f = 750 MHz
Rej900M
55.9
dBc
f = 806 MHz - 928 MHz
1
Rej1800M
49.8
dBc
f = 1710 MHz - 1980 MHz
1
Rej2400M
62.7
dBc
f = 2400 MHz - 2500 MHz
Input P1dB
IP1dB900M
22.0
dBm f = 900 MHz
Input P1dB
IP1dB1710M
26.0
dBm f = 1710 MHz
Input IP3
out-of-band
IIP3OOB
65.1
dBm
k
>1
--
Rejection 1800MHz
Rejection 2400MHz
Stability
1
f1 = 1712.7 MHz, f2 = 1850 MHz
P1IN = +10 dBm, P2IN = +10 dBm
Unconditionnally Stable from 0 to 10GHz
Rejection is defined as following: [Gain at 1575.42 MHz] – [Attenuation@stopband frequency
Application Note AN268, Rev. 1.2
11 / 22
2012-05-05
BGM1034N7
FEM for GPS and GLONASS Applications using Low-Q Inductors
Measured Graphs for GPS and GLONASS Bands
6
Measured Graphs for GPS and GLONASS Bands
Insertion Power Gain In Band
20
1.575 GHz
16.97 dB
1.6054 GHz
16.68 dB
DB(|S(2,1)|)
BGM1034N7_LQ_1.8V
DB(|S(2,1)|)
BGM1034N7_LQ_2.8V
15
1.5981 GHz
16.91 dB
10
5
0
1.5
1.51
1.52
1.53
1.54
1.55
1.56
1.57
1.58
1.59
1.6
1.61
1.62
1.63
1.64
Frequency (GHz)
Figure 6
Power Gain of BGM1034N7 for GPS and GLONASS bands
Noise Figure
4
NF @ Vcc=1.8V
NF @ Vcc=2.8V
3.5
3
2.5
1.605 GHz
2.03 dB
1.598 GHz
1.89 dB
1.575 GHz
1.71 dB
2
1.5
1
1.56
Figure 7
1.565
1.57
1.575
1.58 1.585 1.59
Frequency (GHz)
1.595
1.6
1.605
1.61
Noise Figure of BGM1034N7 for GPS and GLONASS bands
Application Note AN268, Rev. 1.2
12 / 22
2012-05-05
BGM1034N7
FEM for GPS and GLONASS Applications using Low-Q Inductors
Measured Graphs for GPS and GLONASS Bands
Transducer Power Gain Wideband
20
1.598 GHz
16.92 dB
1.575 GHz
16.97 dB
0
DB(|S(2,1)|)
BGM1034N7_LQ_1.8V
DB(|S(2,1)|)
BGM1034N7_LQ_2.8V
1.605 GHz
16.67 dB
0.75 GHz
-39.21 dB
-20
-40
-60
0.9 GHz
-38.88 dB
1.98 GHz
-32.62 dB
2.45 GHz
-45.45 dB
-80
-100
0
1
2
3
4
5
6
Frequency (GHz)
Figure 8
Wideband Insertion Power Gain including out-of-band attenuation of the BGM1034N7
Input Matching
0
1.5981 GHz
-16.6 dB
-10
1.6054 GHz
-14.31 dB
-20
1.5754 GHz
-17.15 dB
DB(|S(1,1)|)
BGM1034N7_LQ_1.8V
-30
DB(|S(1,1)|)
BGM1034N7_LQ_2.8V
-40
1.5
1.52
1.54
1.56
1.58
1.6
1.62
1.64
Frequency (GHz)
Figure 9
Input Matching of BGM1034N7 for GPS and GLONASS bands
Application Note AN268, Rev. 1.2
13 / 22
2012-05-05
BGM1034N7
FEM for GPS and GLONASS Applications using Low-Q Inductors
Measured Graphs for GPS and GLONASS Bands
Output Matching
0
1.5754 GHz
-11.08 dB
1.5981 GHz
-14.47 dB
-10
1.6054 GHz
-15.11 dB
1.5754 GHz
-11.51 dB
-20
DB(|S(2,2)|)
BGM1034N7_LQ_1.8V
1.5981 GHz
-15.13 dB
DB(|S(2,2)|)
BGM1034N7_LQ_2.8V
1.6054 GHz
-15.82 dB
-30
-40
1.5
1.52
1.54
1.56
1.58
1.6
1.62
1.64
Frequency (GHz)
Figure 10
Output Matching of BGM1034N7 for GPS and GLONASS bands
Reverse Isolation
-20
DB(|S(1,2)|)
BGM1034N7_LQ_1.8V
DB(|S(1,2)|)
BGM1034N7_LQ_2.8V
-30
1.5754 GHz
-33.88 dB
1.5981 GHz
-34.79 dB
1.6054 GHz
-35.24 dB
-40
-50
-60
1.5
1.52
1.54
1.56
1.58
1.6
1.62
1.64
Frequency (GHz)
Figure 11
Reverse Isolation of BGM1034N7 for GPS and GLONASS bands
Application Note AN268, Rev. 1.2
14 / 22
2012-05-05
BGM1034N7
FEM for GPS and GLONASS Applications using Low-Q Inductors
Measured Graphs for GPS and GLONASS Bands
Compression point at 1dB Vcc = 1.8V
25
P1dB @ Vcc=1.8V GPS (1575.42 MHz)
P1dB @ Vcc=1.8V GLONASS (1598.06 MHz)
20
15
-25 dBm
16.89
P1dB @ Vcc=1.8V GLONASS (1605.38 MHz)
-25 dBm
16.87
-13.42 dBm
15.89
-25 dBm
16.67
-13.03 dBm
15.87
-13.08 dBm
15.67
10
5
-25
-20
-15
-10
-5
0
Power (dBm)
Figure 12
Input 1dB Compression Point of BGM1034N7 at supply voltage of 1.8V for GPS and
GLONASS bands
Compression point at 1dB Vcc = 2.8V
25
P1dB @ Vcc=2.8V GPS (1575.42 MHz)
P1dB @ Vcc=2.8V GLONASS (1598.06 MHz)
-25 dBm
16.89
20
P1dB @ Vcc=2.8V GLONASS (1605.38 MHz)
-25 dBm
16.89
-13.15 dBm
15.89
-25 dBm
16.68
15
-12.73 dBm
15.89
-12.74 dBm
15.68
10
5
-25
-20
-15
-10
-5
0
Power (dBm)
Figure 13
Input 1dB Compression Point of BGM1034N7 at supply voltage of 2.8V for GPS and
GLONASS bands
Application Note AN268, Rev. 1.2
15 / 22
2012-05-05
BGM1034N7
FEM for GPS and GLONASS Applications using Low-Q Inductors
Measured Graphs for GPS and GLONASS Bands
In Band OIP3 GPS
0
1.5754 GHz
-13.18
1.5764 GHz
-13.18
Power (dBm)
-20
-40
1.5774 GHz
-56.43
-60
-80
-100
1.57342
1.57442
1.57542
1.57642
1.57742
1.57842
Frequency (GHz)
Figure 14
Carrier and intermodulation products of BGM1034N7 for GPS band at Vcc=1.8V
In Band OIP3 GPS
0
1.5754 GHz
-13.19
1.5764 GHz
-13.2
Power (dBm)
-20
-40
1.5774 GHz
-55.91
-60
-80
-100
1.57342
1.57442
1.57542
1.57642
1.57742
1.57842
Frequency (GHz)
Figure 15
Carrier and intermodulation products of BGM1034N7 for GPS band at Vcc=2.8V
Application Note AN268, Rev. 1.2
16 / 22
2012-05-05
BGM1034N7
FEM for GPS and GLONASS Applications using Low-Q Inductors
Measured Graphs for GPS and GLONASS Bands
In Band OIP3 GLONASS
0
1.603 GHz
-13.46
1.604 GHz
-13.51
Power (dBm)
-20
-40
1.605 GHz
-57.67
-60
-80
-100
1.601
1.602
1.603
1.604
1.605
1.606
Frequency (GHz)
Figure 16
Carrier and intermodulation products of BGM1034N7 for GLONASS band at Vcc=1.8V
In Band OIP3 GLONASS
0
1.603 GHz
-13.44
1.604 GHz
-13.49
Power (dBm)
-20
-40
1.605 GHz
-57.75
-60
-80
-100
1.601
1.602
1.603
1.604
1.605
1.606
Frequency (GHz)
Figure 17
Carrier and intermodulation products of BGM1034N7 for GLONASS band at Vcc=2.8V
Application Note AN268, Rev. 1.2
17 / 22
2012-05-05
BGM1034N7
FEM for GPS and GLONASS Applications using Low-Q Inductors
Measured Graphs for GPS and GLONASS Bands
Stability K Factor
4
Stability K factor
BGM1034N7_LQ_1.8V
3.5
Stability K factor
BGM1034N7_LQ_2.8V
1.5754 GHz
3.295
3
2.5
2
0.1
2.1
4.1
6.1
8.1
10
Frequency (GHz)
Figure 18
Stability Factor K of BGM1034N7 for GPS and GLONASS applications
Stability Mu1
4
1.6054 GHz
3.604
1.5981 GHz
3.482
3
2
MU1()
BGM1034N7_LQ_1.8V
MU1()
BGM1034N7_LQ_2.8V
1.5754 GHz
2.461
1
0
0.1
2.1
4.1
6.1
8.1
10
Frequency (GHz)
Figure 19
Stability Factor µ1 of BGM1034N7 for GPS and GLONASS applications
Application Note AN268, Rev. 1.2
18 / 22
2012-05-05
BGM1034N7
FEM for GPS and GLONASS Applications using Low-Q Inductors
Measured Graphs for GPS and GLONASS Bands
Stability Mu2
4
1.5754 GHz
3.891
1.5981 GHz
3.934
1.6054 GHz
3.368
3
2
MU2()
BGM1034N7_LQ_1.8V
1
MU2()
BGM1034N7_LQ_2.8V
0
0.1
2.1
4.1
6.1
8.1
10
Frequency (GHz)
Figure 20
Stability Factor µ2 of BGM1034N7 for GPS and GLONASS applications
Application Note AN268, Rev. 1.2
19 / 22
2012-05-05
BGM1034N7
FEM for GPS and GLONASS Applications using Low-Q Inductors
Evaluation Board and layout Information
7
Evaluation Board and layout Information
In this application note, the following PCB is used:
PCB Marking: M110718 V3.0
PCB material: FR4
r of PCB material: 4.3
Figure 21
Picture of Evaluation Board M110718 V3.0
Vias
FR4, 0.2mm
Copper
35µm
Figure 22
FR4, 0.8mm
PCB Layer Information
Application Note AN268, Rev. 1.2
20 / 22
2012-05-05
BGM1034N7
FEM for GPS and GLONASS Applications using Low-Q Inductors
Authors
8
Authors
Thomas Schwingshackl, Application Engineer of Business Unit “RF and Protection Devices”
Jagjit Singh Bal, Application Engineer of Business Unit “RF and Protection Devices”
Dr. Chih-I Lin, Senior Staff Engineer of Business Unit “RF and Protection Devices”
Application Note AN268, Rev. 1.2
21 / 22
2012-05-05
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Published by Infineon Technologies AG
AN268