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1 Revision 1.1, 2016-09-01
About this document
Scope and purpose
This application note describes Infineon’s BGA729N6 for portable and mobile apppliations and FM radio
application in the range of 70 – 1000 MHz.
1. The BGA729N6 is a Silicon Germanium broadband Low Noise Amplifier (LNA).
2. It supports the portable and mobile TV applications and the FM radio application.
3. In this application note, the performance of BGA729N6 is presented. The circuit requires no external
components for matching. The performance is measured on a FR4 board. 4. Key performance parameters at 2.8V, 470 MHz
a) High Gain Mode: Noise Figure = 1.05 dB Insertion Gain = 16.5 dB
Input return loss = 9.7 dB Output return loss = 17.7 dB Input P1dB = -15.8 dBm
b) Bypass Mode:
Noise figure = 5.0 dB Insertion Loss = 4.2 dB
Input return loss = 15.5 dB Output return loss = 12.9 dB
Input P1dB = 5.9 dBm
Broadba n d M MI C : B GA72 9 N6
Lo w No ise Ampli f i er for Portabl e an d
Mob ile T V Appl i cat io ns a nd FM Rad io
Appl i cat io n
Application Note AN441
Broadband LNA for Mobile TV and FM Radio Applications
Table of Content
Application Note AN441 2 Revision 1.1, 2016-09-01
Table of Contents
About this document ................................................................................................................... 1
1 Introduction of Mobile TV and FM Radio Applications ...................................................... 5
1.1 Mobile TV application overview .......................................................................................................... 5 1.2 Infineon’s devices for the Mobile TV application ............................................................................... 5 1.3 Requirement of the Mobile TV application on the Low Noise Amplifier ........................................... 5
1.4 FM Radio application overview .......................................................................................................... 6 1.5 BGA729N6 as Low Noise Amplifier for the FM Radio application ...................................................... 6
2 BGA729N6 Overview .................................................................................................... 7
2.1 Features ............................................................................................................................................... 7 2.2 Key Applications of BGA729N6 ........................................................................................................... 7 2.3 Description .......................................................................................................................................... 7
3 Application Circuit and Performance Overview .............................................................. 9
3.1 Summary of Measurement Results..................................................................................................... 9
3.2 BGA729N6 as 70 MHz – 1000 MHz Low Noise Amplifier for Mobile TV and FM Radio Applications 13 3.3 Schematics and Bill-of-Materials ...................................................................................................... 14
4 Measurement Graphs ................................................................................................ 15
4.1 High Gain Mode (Selected Graphs) ................................................................................................... 15
4.2 Bypass Mode (Selected Graphs) ....................................................................................................... 23
5 Evaluation Board and Layout Information ................................................................... 29
6 Authors .................................................................................................................... 31
7 Reference ................................................................................................................. 31
Revision History ........................................................................................................................ 31
Broadband LNA for Mobile TV and FM Radio Applications
List of Figures and Tables
Application Note AN441 3 Revision 1.1, 2016-09-01
List of Figures1 Figure 1 Application Diagram: Mobile TV and FM Reception in Mobile Phones with Band Selection Switch5
Figure 2 BGA729N6 in TSNP-6-2 ........................................................................................................................ 7
Figure 3 Equivalent Circuit of BGA729N6 ......................................................................................................... 8 Figure 4 Schematics of the BGA729N6 Application Circuit ........................................................................... 14 Figure 5 Insertion Gain (Narrowband) of the BGA729N6 for Mobile TV and FM Radio Applications ........... 15
Figure 6 Insertion Gain (Wideband) of the BGA729N6 for Mobile TV and FM Radio Applications ............... 15
Figure 7 Noise Figure (SMA and connector loss deembedded) of the BGA729N6 for Mobile TV and FM Radio Applications ............................................................................................................................ 16
Figure 8 Input Return Loss of the BGA729N6 for Mobile TV and FM Radio Applications ............................. 16 Figure 9 Input Return Loss (Smith Chart) of the BGA729N6 for Mobile TV and FM Radio Applications ...... 17
Figure 10 Output Return Loss of the BGA729N6 for Mobile TV and FM Radio Applications .......................... 17 Figure 11 Output Return Loss (Smith Chart) of the BGA729N6 for Mobile TV and FM Radio Applications ... 18 Figure 12 Reverse Isolation of the BGA729N6 for Mobile TV and FM Radio Applications .............................. 18
Figure 13 Stability Factor k of the BGA729N6 for Mobile TV and FM Radio Applications .............................. 19
Figure 14 Stability Factor µ1, µ2 of the BGA729N6 for Mobile TV and FM Radio Applications ..................... 19 Figure 15 1 dB Compression Point of the BGA729N6 for Mobile TV and FM Radio Applications (88 MHz) ... 20 Figure 16 1 dB Compression Point of the BGA729N6 for Mobile TV and FM Radio Applications (470 MHz) . 20
Figure 17 1 dB Compression Point of the BGA729N6 for Mobile TV and FM Radio Applications (860 MHz) . 21
Figure 18 Third-Order Intercept Point of the BGA729N6 for Mobile TV and FM Radio Applications (2.8V, 88
MHz) ................................................................................................................................................... 21 Figure 19 Third-Order Intercept Point of the BGA729N6 for Mobile TV and FM Radio Applications (2.8V,
470 MHz) ............................................................................................................................................ 22 Figure 20 Third-Order Intercept Point of the BGA729N6 for Mobile TV and FM Radio Applications (2.8V,
860 MHz) ............................................................................................................................................ 22 Figure 21 Insertion Gain (Wideband) of the BGA729N6 for Mobile TV and FM Radio Applications ............... 23
Figure 22 Insertion Gain (Wideband) of the BGA729N6 for Mobile TV and FM Radio Applications ............... 23 Figure 23 Input Return Loss of the BGA729N6 for Mobile TV and FM Radio Applications ............................. 24
Figure 24 Output Return Loss of the BGA729N6 for Mobile TV and FM Radio Applications .......................... 24
Figure 25 Stability Factor k of the BGA729N6 for Mobile TV and FM Radio Applications .............................. 25 Figure 26 1 dB Compression Point of the BGA729N6 for Mobile TV and FM Radio Applications (88 MHz) ... 25 Figure 27 1 dB Compression Point of the BGA729N6 for Mobile TV and FM Radio Applications (470 MHz) . 26 Figure 28 1 dB Compression Point of the BGA729N6 for Mobile TV and FM Radio Applications (860 MHz) . 26
Figure 29 Third-Order Intercept Point of the BGA729N6 for Mobile TV and FM Radio Applications (2.8V, 88
MHz) ................................................................................................................................................... 27 Figure 30 Third-Order Intercept Point of the BGA729N6 for Mobile TV and FM Radio Applications (2.8V,
470 MHz) ............................................................................................................................................ 27
Figure 31 Third-Order Intercept Point of the BGA729N6 for Mobile TV and FM Radio Applications (2.8V, 860 MHz) ............................................................................................................................................ 28
Figure 32 Photo Picture of Evaluation Board (overview) <PCB Marking M150831 Rev.1.0> .......................... 29 Figure 33 Photo Picture of Evaluation Board (detailed view) ......................................................................... 29
Figure 34 PCB Layer Information ...................................................................................................................... 30
List of Tables Table 1 Pin Assignment of BGA729N6 ............................................................................................................. 8 Table 2 Gain Mode Selection Truth Table ....................................................................................................... 8
Table 3 Electrical Characteristics (at room temperature) at 2.8 V for High Gain Mode ................................. 9
Broadband LNA for Mobile TV and FM Radio Applications
List of Figures and Tables
Application Note AN441 4 Revision 1.1, 2016-09-01
Table 4 Electrical Characteristics (at room temperature) at 2.8 V for Bypass Mode ................................... 10 Table 5 Electrical Characteristics (at room temperature) at 1.8 V for High Gain Mode ............................... 11
Table 6 Electrical Characteristics (at room temperature) at 1.8 V for Bypass Mode ................................... 12
Table 7 Bill-of-Materials ................................................................................................................................. 14
1) The graphs are generated with the simulation program AWR Microwave Office®.
Broadband LNA for Mobile TV and FM Radio Applications
Introduction of Mobile TV and FM Radio Applications
Application Note AN441 5 Revision 1.1, 2016-09-01
1 Introduction of Mobile TV and FM Radio Applications
1.1 Mobile TV application overview
Mobile phones today are all-in-one devices. They have not only wireless functions for voice and data but
also entertainment features. Mobile TV is one of the most fascinating features. It brings live news and
entertainment programs onto the phone display and enables people not to miss their favorite programs.
Tuner IC
ESD Diode
LNA
Analog TV/DVB-T/CMMB/T-DMB/ISDB-T/DVB-H40 – 860 MHz
LPF UHF
VHF
FM Tuner IC
SP3TSwitch
Figure 1 Application Diagram: Mobile TV and FM Reception in Mobile Phones with Band Selection
Switch
1.2 Infineon’s devices for the Mobile TV application
Infineon’s mobile TV LNA BGA729N6 is especially designed for the mobile TV reception with 50-Ohm
interfaces, while our RF transistors offer cost-effective solutions to improve the signal-to-noise ratio and
therefore the quality of the TV reception. Those LNAs together with Infineon’s ESD protection diode from the
ESD108-B1-CSP0201 and ESD103-B1-02EL/02ELS series improve systems' ESD performance up to 8 kV
contact discharge (IEC61000-4-2) at the antenna input. The parasitic capacitance is only 0.2 pF.
Infineon’s SP3T switch series can be used to switch between the mobile TV tuner IC and the FM tuner IC.
1.3 Requirement of the Mobile TV application on the Low Noise Amplifier
Low Noise Figure & High Gain
An external LNA or LNA module boosts the sensitivity of the system by reducing the overall NF. In addition
due to the size constraint, the modem antenna and the receiver FE cannot always be placed close to the
transceiver Integrated Circuit (IC). The path loss in front of the integrated LNA on the transceiver IC
increases the system NF significantly. An external LNA physically close to the antenna can help to eliminate
Broadband LNA for Mobile TV and FM Radio Applications
Introduction of Mobile TV and FM Radio Applications
Application Note AN441 6 Revision 1.1, 2016-09-01
the path loss and reduce the system NF. The sensitivity can be improved by several dB, which means a
significant increase in the connectivity range
High Linearity (1-dB compression point P1dB and 3rd-order intercept point IP3): An increased number of
bands at the receiver input create strong interference, leading to high requirements in linearity
characteristics such as high input 1-dB compression point, 2nd intermodulation (IMD2) products and input
IP3 performance.
Stable Gain:
The portable and mobile TV application ranges from 170 MHz to 960 MHz, a stable gain over this broad
frequency range is a key requirement to the mobile TV LNA.
1.4 FM Radio application overview
Frequency Modulation (FM) radio has a long history, starting from its development in 1933. Today, FM radio
is an integral part of almost all mobile phones. The headset cable can serve as an antenna for FM reception.
Its size (~75 cm) is ideal to have good reception. Nevertheless, no FM reception is possible when the headset
is not available.
There is a clear market trend to be able to use FM radio without the headset cable, meaning that the
antenna has to be integrated inside the phone. However, there are space constraints on the antenna design.
Shrinking the size of the antenna introduces a high loss in the system which reduces the receiver's
sensitivity.
1.5 BGA729N6 as Low Noise Amplifier for the FM Radio application
The BGA729N6 also covers the FM radio frequencies, and is a potential solution as low noise amfplifier for
FM radio application. The LNA is prematched as a 50 Ohm solution, it solves the problem of the short FM
antenna in mobile phones through better impedance match between the FM antenna and the FM receiver.
Therefore, it can keep the sytem signal-to-noise ratio as good as with a headset.
Broadband LNA for Mobile TV and FM Radio Applications
BGA729N6 Overview
Application Note AN441 7 Revision 1.1, 2016-09-01
2 BGA729N6 Overview
2.1 Features
• Insertion power gain: 16.3 dB
• Insertion Loss in bypass mode: -4.2 dB
• Low noise figure: 1.05 dB / 4.3 dB in high gain /
bypass mode
• Low current consumption: 6.3 mA
• Power off function
• Operating frequency: 70 -1000 MHz
• Three-state control: OFF-, Bypass- and High
gain-Mode
• Supply voltage: 1.5 V to 3.3 V
• Ultra small TSNP-6-2 leadless package (footprint: 0.7 x 1.1 mm2)
• B7HF Silicon Germanium technology
• No external matching inductor required
• RF input and output internally matched to 50
• Only 2 external SMD components necessary
• 2kV HBM ESD protection (including AI-pin)
• Pb-free (RoHS compliant) package
Figure 2 BGA729N6 in TSNP-6-2
2.2 Key Applications of BGA729N6
The BGA729N6 is a broadband low power low noise amplifier (LNA) MMIC for portable and mobile TV
applications and FM radio application.
2.3 Description
The BGA729N6 is a broadband low power low noise amplifier (LNA) MMIC for portable and mobile TV applications and FM radio application which covers a wide frequency range from 70 MHz to 1000 MHz. The LNA provides 16.3 dB gain and 1.05 dB noise figure at a current consumption of 6.3 mA in the application configuration described in Chapter 3. In bypass mode, the LNA provides an insertion loss of -4.2 dB. The
bypass mode with much higher linearity enables this LNA to work with much lower current consumption than commonly used TV LNAs. The BGA729N6 is based upon Infineon Technologies‘s B7HF Silicon Germanium technology. It operates from 1.5 V to 3.3 V supply voltage.
Broadband LNA for Mobile TV and FM Radio Applications
BGA729N6 Overview
Application Note AN441 8 Revision 1.1, 2016-09-01
Please visit the product page of BGA729N6 for more information.
AI AO
GND
PONVCC
ESD
GS
Figure 3 Equivalent Circuit of BGA729N6
Product Name Marking Code
BGA729N6 M TSNP-6-2
Table 1 Pin Assignment of BGA729N6
Pin No. Symbol Function
1 GS High gain / bypass control
2 VCC DC supply
3 AO LNA output
4 GND Ground
5 AI LNA input
6 PON Power on / off control
Table 2 Gain Mode Selection Truth Table
Control Voltage VPON Control Voltage VGS Gain Mode
High Low High Gain
High High Bypass
Low High Bypass
Low Low Off
Broadband LNA for Mobile TV and FM Radio Applications
Application Circuit and Performance Overview
Application Note AN441 9 Revision 1.1, 2016-09-01
3 Application Circuit and Performance Overview In this chapter the performance of the application circuit, the schematic and bill-on-materials are presented.
Device: BGA729N6
Application: Broadband LNA for Mobile TV and FM Radio Applications
PCB Marking: M150831
EVB Order No.: AN441
3.1 Summary of Measurement Results
Ther performance of BGA729N6 for Mobile TV and FM Radio Applications is summarized in the following table.
Table 3 Electrical Characteristics (at room temperature) at 2.8 V for High Gain Mode
VPON = 2.8V , VBP = 0 V
Parameter Symbol Value Unit Comment/Test Condition
Application System Sys FM
Radio MobileTV
UHF MobileTV
UHF MHz
DC Voltage Vcc 2.8 V
DC Current Icc 6.4 mA
Frequency Range Freq 881) 470 860 MHz
Insertion Power Gain G 17.2 16.5 15.8 dB
Loss of input/output line of
0.01 dB@ 88MHz, 0.03 dB @ 470MHz, 0.05 dB @860 MHz
are included
Noise Figure NF 1.00 1.05 1.05 dB
Loss of input/output line of
0.01 dB@ 88MHz, 0.03 dB @ 470MHz, 0.05 dB @860 MHz
are deembedded
Input Return Loss RLin 9.1 9.7 8.8 dB
Output Return Loss RLout 21.3 17.7 13.6 dB
Reverse Isolation IRev 27.5 28.0 28.8 dB
Input P1dB IP1dB -18.2 -15.8 -14.8 dBm
Output P1dB OP1dB -2.0 -0.3 0 dBm
Input IP3 IIP3 -5.1 -4.5 -3.3 dBm f1 = 88, 470, 860 MHz
respectively, f2 = f1 + 1 MHz
-30 dBm per tone Output IP3 OIP3 11.8 11.7 12.5 dBm
Stability k >1 -- Measured up to 10 GHz
Note: 1) Globally the FM radio frequencies are allocated between 66 – 108 MHz.
Broadband LNA for Mobile TV and FM Radio Applications
Application Circuit and Performance Overview
Application Note AN441 10 Revision 1.1, 2016-09-01
2) To view the performance in VHF III band (174 MHz -230 MHz), please refer to application note AN505.
Table 4 Electrical Characteristics (at room temperature) at 2.8 V for Bypass Mode
VPON = 2.8V , VBP = 2.8 V
Parameter Symbol Value Unit Comment/Test Condition
Application System Sys FM
Radio
MobileTV
UHF
MobileTV
UHF MHz
DC Voltage Vcc 2.8 V
DC Current Icc 0.6 mA
Frequency Range Freq 881) 470 860 MHz
Gain G -6.7 -4.2 -4.9 dB
Loss of input/output line of
0.01 dB@ 88MHz, 0.03 dB @ 470MHz, 0.05 dB @860 MHz are included
Noise Figure NF 7.9 5.0 4.2 dB
Loss of input/output line of
0.01 dB@ 88MHz, 0.03 dB @ 470MHz, 0.05 dB @860 MHz
are deembedded
Input Return Loss RLin 5.2 15.5 13.0 dB
Output Return Loss RLout 11.1 12.9 11.4 dB
Reverse Isolation IRev 6.8 4.2 4.5 dB
Input P1dB IP1dB 6.1 5.9 6.3 dBm
Output P1dB OP1dB -1.6 0.7 0.4 dBm
Input IP3 IIP3 21.1 21.2 23.7 dBm f1 = 88, 470, 860 MHz
respectively, f2 = f1 + 1 MHz
-10 dBm per tone Output IP3 OIP3 14.2 17.0 18.8 dBm
Stability k >1 -- Measured up to 10 GHz
Note: 1) Globally the FM radio frequencies are allocated between 66 – 108 MHz.
2) To view the performance in VHF III band (174 MHz -230 MHz), please refer to application note AN505.
Broadband LNA for Mobile TV and FM Radio Applications
Application Circuit and Performance Overview
Application Note AN441 11 Revision 1.1, 2016-09-01
Table 5 Electrical Characteristics (at room temperature) at 1.8 V for High Gain Mode
VPON = 1.8V , VBP = 0 V
Parameter Symbol Value Unit Comment/Test Condition
Application System Sys FM
Radio MobileTV
UHF MobileTV
UHF MHz
DC Voltage Vcc 1.8 V
DC Current Icc 6.3 mA
Frequency Range Freq 881) 470 860 MHz 1)Measured @ 98 MHz
Insertion Power Gain G 17.1 16.4 15.7 dB
Loss of input/output line of
0.01 dB@ 88MHz, 0.03 dB @
470MHz, 0.05 dB @860 MHz
are included
Noise Figure NF 0.95 1.05 1.05 dB
Loss of input/output line of
0.01 dB@ 88MHz, 0.03 dB @ 470MHz, 0.05 dB @860 MHz
are deembedded
Input Return Loss RLin 8.9 9.5 8.6 dB
Output Return Loss RLout 21.0 17.3 13.5 dB
Reverse Isolation IRev 27.4 27.8 28.3 dB
Input P1dB IP1dB -18.1 -16.3 -15.5 dBm
Output P1dB OP1dB -2.0 -0.9 -0.8 dBm
Input IP3 IIP3 -4.7 -4.0 -4.5 dBm f1 = 88, 470, 860 MHz
respectively, f2 = f1 + 1 MHz
-30 dBm per tone Output IP3 OIP3 11.9 12.0 11.2 dBm
Stability k >1 -- Measured up to 10 GHz
Note: 1) Globally the FM radio frequencies are allocated between 66 – 108 MHz.
2) To view the performance in VHF III band (174 MHz -230 MHz), please refer to application note AN505.
Broadband LNA for Mobile TV and FM Radio Applications
Application Circuit and Performance Overview
Application Note AN441 12 Revision 1.1, 2016-09-01
Table 6 Electrical Characteristics (at room temperature) at 1.8 V for Bypass Mode
VPON = 1.8V , VBP = 1.8 V
Parameter Symbol Value Unit Comment/Test Condition
Application System Sys FM
Radio
MobileTV
UHF
MobileTV
UHF MHz
DC Voltage Vcc 1.8 V
DC Current Icc 0.3 mA
Frequency Range Freq 881) 470 860 MHz 1)Measured @ 98 MHz
Insertion Power Gain G -6.9 -4.5 -4.8 dB
Loss of input/output line of
0.01 dB@ 88MHz, 0.03 dB @
470MHz, 0.05 dB @860 MHz are included
Noise Figure NF 7.9 5.0 4.4 dB
Loss of input/output line of
0.01 dB@ 88MHz, 0.03 dB @ 470MHz, 0.05 dB @860 MHz
are deembedded
Input Return Loss RLin 5.1 15.1 12.3 dB
Output Return Loss RLout 11.3 13.1 11.5 dB
Reverse Isolation IRev 6.9 4.5 4.8 dB
Input P1dB IP1dB 3.5 3.0 6.0 dBm
Output P1dB OP1dB -4.4 -2.5 0.2 dBm
Input IP3 IIP3 15.5 15.6 17.9 dBm f1 = 88, 470, 860 MHz
respectively, f2 = f1 + 1 MHz
-10 dBm per tone Output IP3 OIP3 8.5 11.1 13.1 dBm
Stability k >1 -- Measured up to 10 GHz
Note: 1) Globally the FM radio frequencies are allocated between 66 – 108 MHz.
2) To view the performance in VHF III band (174 MHz -230 MHz), please refer to application note AN505.
Broadband LNA for Mobile TV and FM Radio Applications
Application Circuit and Performance Overview
Application Note AN441 13 Revision 1.1, 2016-09-01
3.2 BGA729N6 as 70 MHz – 1000 MHz Low Noise Amplifier for Mobile TV and
FM Radio Applications
The BGA729N6 is a Silicon Germanium Low Noise Amplifier for mobile TV applications and FM radio application in the range from 70 MHz – 1000 MHz. In this application note, the performance of BGA729N6 for
mobile TV and FM radio applications is investigated at 1.8 V and 2.8 V supply voltages. The circuit targets to use as few components as possible.
At 2.8V, 88 MHz, in the high gain mode the BGA729N6 achieves a noise figure of 1.0 dB and a gain of 17.2 dB.
The input return loss is 9.1 dB and output return loss is 21.3 dB. It obtains the input 1dB Compression Point
(IP1dB) at -18.2 dBm. Using two tones of –30 dBm spacing 1 MHz, the circuit achieves an input Third-order
Intercept Point (IIP3) of -5.1 dBm.
At 2.8 V, 88 MHz, in the bypass mode the BGA729N6 achieves a noise figure of >3.0 dB and an insertion loss of
6.7 dB. The input return loss is 5.2 dB and output return loss is 11.1 dB. It obtains the input 1dB Compression
Point (IP1dB) at 3.5 dBm. Using two tones of –10 dBm spacing 1 MHz, the circuit achieves an input Third-order Intercept Point (IIP3) of 15.5 dBm.
At 2.8V, 470 MHz, in the high gain mode the BGA729N6 achieves a noise figure of 1.2 dB and a gain of 16.5 dB.
The input return loss is 9.7 dB and output return loss is 17.7 dB. It obtains the input 1dB Compression Point (IP1dB) at -15.8 dBm. Using two tones of –30 dBm spacing 1 MHz, the circuit achieves an input Third-order Intercept Point (IIP3) of -4.5 dBm.
At 2.8 V, 470 MHz, in the bypass mode the BGA729N6 achieves a noise figure of >3.0 dB and an insertion loss of 4.2 dB. The input return loss is 15.5 dB and output return loss is 12.9 dB. It obtains the input 1dB Compression Point (IP1dB) at 5.9 dBm. Using two tones of –10 dBm spacing 1 MHz, the circuit achieves an
input Third-order Intercept Point (IIP3) of 21.2 dBm.
The circuit is unconditionally stable up to 10 GHz.
Broadband LNA for Mobile TV and FM Radio Applications
Application Circuit and Performance Overview
Application Note AN441 14 Revision 1.1, 2016-09-01
3.3 Schematics and Bill-of-Materials
Ther schematic of BGA729N6 for mobile TV and FM radio applications is presented in Figure 4 and its bill-of-
materials is shown in Table 7.
Figure 4 Schematics of the BGA729N6 Application Circuit
Table 7 Bill-of-Materials
Symbol Value Unit Size Manufacturer Comment
C1 1 nF 0402 Various DC block 1)
C2 1 nF 0402 Various DC block 1)
C3 >=1 nF 0402 Various RF bypass2). Necessary in FM application, optional in mobile TV
application
N1 BGA729N6 TSNP-6-2 Infineon SiGe LNA
Note: 1) DC block might be necessary due to internal LNA bias voltage @ AI (LNA Analog Input pin). The DC block can be realized pre-filter (e.g. SAW)
2) The RF bypass capacitor C3 at the DC power supply pin filters out the power supply noise and stabilizes the DC supply. The RF bypass capacitor C3 is not necessary if a clean and stable DC supply can be ensured.
Broadband LNA for Mobile TV and FM Radio Applications
Measurement Graphs
Application Note AN441 15 Revision 1.1, 2016-09-01
4 Measurement Graphs The performance of the application circuit is presented with the following graphs.
4.1 High Gain Mode (Selected Graphs)
Figure 5 Insertion Gain (Narrowband) of the BGA729N6 for Mobile TV and FM Radio Applications
Figure 6 Insertion Gain (Wideband) of the BGA729N6 for Mobile TV and FM Radio Applications
0 400 800 1200
Frequency (MHz)
Insertion Power Gain
10
12
14
16
18
20
860 MHz15.8 dB
470 MHz16.5 dB
860 MHz15.7 dB
470 MHz16.4 dB
88 MHz17.1 dB
88 MHz17.2 dB
High Gain 2V8
High Gain 1V8
0 1000 2000 3000 4000
Frequency (MHz)
Insertion Power Gain WideBand
0
5
10
15
20
1000 MHz15.5 dB
470 MHz16.4 dB
70 MHz17.2 dB
1000 MHz15.7 dB
470 MHz16.5 dB
70 MHz17.3 dB
High Gain 1V8
High Gain 2V8
Broadband LNA for Mobile TV and FM Radio Applications
Measurement Graphs
Application Note AN441 16 Revision 1.1, 2016-09-01
Figure 7 Noise Figure (SMA and connector loss deembedded) of the BGA729N6 for Mobile TV and
FM Radio Applications
Figure 8 Input Return Loss of the BGA729N6 for Mobile TV and FM Radio Applications
50 250 450 650 850 1000
Frequency (MHz)
Noise Figure
0
0.5
1
1.5
2
NF
(dB
)
860 MHz1.05
470 MHz1.05
88 MHz0.97
470 MHz1.05
88 MHz0.95 860 MHz
1.06
High Gain 1V8
High Gain 2V8
0 400 800 1200
Frequency (MHz)
Input Return Loss HG
-20
-15
-10
-5
0
88 MHz-9.1 dB
860 MHz-8.6 dB
860 MHz-8.8 dB
470 MHz-9.7 dB
88 MHz-8.9 dB
470 MHz-9.5 dB
High Gain 1V8
High Gain 2V8
Broadband LNA for Mobile TV and FM Radio Applications
Measurement Graphs
Application Note AN441 17 Revision 1.1, 2016-09-01
Figure 9 Input Return Loss (Smith Chart) of the BGA729N6 for Mobile TV and FM Radio Applications
Figure 10 Output Return Loss of the BGA729N6 for Mobile TV and FM Radio Applications
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 Return Loss SmithSwp Max
1200MHz
Swp Min
10MHz
860 MHzr 0.899556x -0.761279
470 MHzr 1.40478x -0.809503 88 MHz
r 1.96116x -0.672589
High Gain 1V8
High Gain 2V8
0 400 800 1200
Frequency (MHz)
Output Return Loss
-30
-25
-20
-15
-10
-5
0
470 MHz-17.7 dB
470 MHz-17.3 dB
860 MHz-13.6 dB
88 MHz-21.3 dB
860 MHz-13.5 dB
88 MHz-21.0 dB
High Gain 1V8
High Gain 2V8
Broadband LNA for Mobile TV and FM Radio Applications
Measurement Graphs
Application Note AN441 18 Revision 1.1, 2016-09-01
Figure 11 Output Return Loss (Smith Chart) of the BGA729N6 for Mobile TV and FM Radio
Applications
Figure 12 Reverse Isolation of the BGA729N6 for Mobile TV and FM Radio Applications
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
Output Return Loss SmithSwp Max
1200MHz
Swp Min
10MHz
470 MHzr 0.998515x -0.278255
88 MHzr 1.08466x -0.186874
860 MHzr 0.834678x -0.379654
High Gain 1V8
High Gain 2V8
0 400 800 1200
Frequency (MHz)
Reverse Isolation
-80
-60
-40
-20
0
88 MHz-27.5 dB
470 MHz-27.8 dB
470 MHz-28.0 dB
860 MHz-28.8 dB
860 MHz-28.3 dB
88 MHz-27.4 dB
High Gain 1V8
High Gain 2V8
Broadband LNA for Mobile TV and FM Radio Applications
Measurement Graphs
Application Note AN441 19 Revision 1.1, 2016-09-01
Figure 13 Stability Factor k of the BGA729N6 for Mobile TV and FM Radio Applications
Figure 14 Stability Factor µ1, µ2 of the BGA729N6 for Mobile TV and FM Radio Applications
0 2000 4000 6000 8000 10000
Frequency (MHz)
Stability k Factor HG
0
1
2
3
4
5High Gain 1V8
High Gain 2V8
0 2000 4000 6000 8000 10000
Frequency (MHz)
Stability Mu Factors
0
1
2
3
4
5MU1()High Gain 1V8
MU1()High Gain 2V8
MU2()High Gain 1V8
MU2()High Gain 2V8
Broadband LNA for Mobile TV and FM Radio Applications
Measurement Graphs
Application Note AN441 20 Revision 1.1, 2016-09-01
Figure 15 1 dB Compression Point of the BGA729N6 for Mobile TV and FM Radio Applications (88
MHz)
Figure 16 1 dB Compression Point of the BGA729N6 for Mobile TV and FM Radio Applications (470
MHz)
-35 -30 -25 -20 -15 -10
Power_In (dBm)
Input 1dB Compression Point 88 MHz
0
5
10
15
20
Gain
(dB
)
-18.2 dBm16.4
-35.0 dBm17.4
-35.0 dBm17.3 -18.1 dBm
16.3
High Gain 1V8
High Gain 2V8
-30 -20 -10 0
Power_In (dBm)
Input 1dB Compression Point 470 MHz
0
5
10
15
20
Gain
(dB
) -16.3 dBm15.5
-15.8 dBm15.6
-30.0 dBm16.5
-30.0 dBm16.6
High Gain 1V8
High Gain 2V8
Broadband LNA for Mobile TV and FM Radio Applications
Measurement Graphs
Application Note AN441 21 Revision 1.1, 2016-09-01
Figure 17 1 dB Compression Point of the BGA729N6 for Mobile TV and FM Radio Applications (860
MHz)
Figure 18 Third-Order Intercept Point of the BGA729N6 for Mobile TV and FM Radio Applications
(2.8V, 88 MHz)
-35 -25 -15 -5 0
Power_In (dBm)
Input 1dB Compression Point 860 MHz
0
5
10
15
20
Gain
(dB
)
-14.8 dBm15.0
-15.5 dBm14.8
-35.0 dBm16.0
-35.0 dBm15.8
High Gain 1V8
High Gain 2V8
86 87 88 89 90 91
Frequency (MHz)
Intermodulation 2V8 HG
-120
-100
-80
-60
-40
-20
0
Outp
ut P
ow
er
(dB
m)
90 MHz-77.2
89 MHz-13.1
87 MHz-62.9
88 MHz-13.1
Broadband LNA for Mobile TV and FM Radio Applications
Measurement Graphs
Application Note AN441 22 Revision 1.1, 2016-09-01
Figure 19 Third-Order Intercept Point of the BGA729N6 for Mobile TV and FM Radio Applications
(2.8V, 470 MHz)
Figure 20 Third-Order Intercept Point of the BGA729N6 for Mobile TV and FM Radio Applications
(2.8V, 860 MHz)
468 469 470 471 472 473
Frequency (MHz)
Intermodulation 2V8 HG
-120
-100
-80
-60
-40
-20
0
Outp
ut P
ow
er
(dB
m)
472 MHz-70.8
471 MHz-14.0
469 MHz-65.0
470 MHz-14.0
858 859 860 861 862 863
Frequency (MHz)
Intermodulation 2V8 HG
-120
-100
-80
-60
-40
-20
0
Outp
ut P
ow
er
(dB
m)
862 MHz-70.9859 MHz
-68.2
861 MHz-14.7860 MHz
-14.7
Broadband LNA for Mobile TV and FM Radio Applications
Measurement Graphs
Application Note AN441 23 Revision 1.1, 2016-09-01
4.2 Bypass Mode (Selected Graphs)
Figure 21 Insertion Gain (Wideband) of the BGA729N6 for Mobile TV and FM Radio Applications
Figure 22 Insertion Gain (Wideband) of the BGA729N6 for Mobile TV and FM Radio Applications
0 400 800 1200
Frequency (MHz)
Insertion Power Gain
-10
-8
-6
-4
-2
0
88 MHz-6.7 dB
88 MHz-6.9 dB
860 MHz-4.5 dB
470 MHz-4.2 dB
860 MHz-4.8 dB
470 MHz-4.5 dB
Bypass 1V8
Bypass 2V8
0 1000 2000 3000 4000
Frequency (MHz)
Insertion Power Gain Wideband
-20
-15
-10
-5
0
1000 MHz-5.1 dB
1000 MHz-4.8 dB
70 MHz-7.8 dB
70 MHz-7.7 dB
470 MHz-4.2 dB
470 MHz-4.5 dB
Bypass 1V8
Bypass 2V8
Broadband LNA for Mobile TV and FM Radio Applications
Measurement Graphs
Application Note AN441 24 Revision 1.1, 2016-09-01
Figure 23 Input Return Loss of the BGA729N6 for Mobile TV and FM Radio Applications
Figure 24 Output Return Loss of the BGA729N6 for Mobile TV and FM Radio Applications
0 400 800 1200
Frequency (MHz)
Input Return Loss
-20
-15
-10
-5
0
470 MHz-15.5 dB
88 MHz-5.2 dB
860 MHz-13.0 dB
88 MHz-5.1 dB
470 MHz-15.1 dB
860 MHz-12.3 dB
Bypass 1V8
Bypass 2V8
0 400 800 1200
Frequency (MHz)
Output Return Loss
-20
-15
-10
-5
0
470 MHz-12.9 dB
860 MHz-11.5 dB
860 MHz-11.4 dB
88 MHz-11.1 dB
470 MHz-13.1 dB
88 MHz-11.3 dB
Bypass 1V8
Bypass 2V8
Broadband LNA for Mobile TV and FM Radio Applications
Measurement Graphs
Application Note AN441 25 Revision 1.1, 2016-09-01
Figure 25 Stability Factor k of the BGA729N6 for Mobile TV and FM Radio Applications
Figure 26 1 dB Compression Point of the BGA729N6 for Mobile TV and FM Radio Applications (88
MHz)
0 2000 4000 6000 8000 10000
Frequency (MHz)
Stability k Factor
0
1
2
3
4
5Bypass 1V8
Bypass 2V8
-25 -15 -5 5 10
Power_In (dBm)
Input 1dB Compression Point 88 MHz
-14
-12
-10
-8
-6
-4
-2
Gain
(dB
)
3.5 dBm-8.0
-25.0 dBm-7.0
6.1 dBm-7.7
-25.0 dBm-6.7
Bypass 1V8
Bypass 2V8
Broadband LNA for Mobile TV and FM Radio Applications
Measurement Graphs
Application Note AN441 26 Revision 1.1, 2016-09-01
Figure 27 1 dB Compression Point of the BGA729N6 for Mobile TV and FM Radio Applications (470
MHz)
Figure 28 1 dB Compression Point of the BGA729N6 for Mobile TV and FM Radio Applications (860
MHz)
-25 -15 -5 5 10
Power_In (dBm)
Input 1dB Compression Point 470 MHz
-14
-12
-10
-8
-6
-4
-2
Gain
(dB
) 3.0 dBm-5.5
-25.0 dBm-4.5
5.9 dBm-5.2
-25.0 dBm-4.2
Bypass 1V8
Bypass 2V8
-25 -15 -5 5 10
Power_In (dBm)
Input 1dB Compression Point 860 MHz
-14
-12
-10
-8
-6
-4
-2
Gain
(dB
)
6.0 dBm-5.8
6.3 dBm-5.5
-25.0 dBm-4.8
-25.0 dBm-4.5
Bypass 1V8
Bypass 2V8
Broadband LNA for Mobile TV and FM Radio Applications
Measurement Graphs
Application Note AN441 27 Revision 1.1, 2016-09-01
Figure 29 Third-Order Intercept Point of the BGA729N6 for Mobile TV and FM Radio Applications
(2.8V, 88 MHz)
Figure 30 Third-Order Intercept Point of the BGA729N6 for Mobile TV and FM Radio Applications
(2.8V, 470 MHz)
86 87 88 89 90 91
Frequency (MHz)
Intermodulation 2V8 BP
-120
-100
-80
-60
-40
-20
0
Outp
ut P
ow
er
(dB
m)
90 MHz-80.1
89 MHz-16.5
87 MHz-79.1
88 MHz-16.9
468 469 470 471 472 473
Frequency (MHz)
Intermodulation 2V8 BP
-120
-100
-80
-60
-40
-20
0
Outp
ut P
ow
er
(dB
m)
472 MHz-77.9
471 MHz-14.5
469 MHz-76.9
470 MHz-14.5
Broadband LNA for Mobile TV and FM Radio Applications
Measurement Graphs
Application Note AN441 28 Revision 1.1, 2016-09-01
Figure 31 Third-Order Intercept Point of the BGA729N6 for Mobile TV and FM Radio Applications
(2.8V, 860 MHz)
858 859 860 861 862 863
Frequency (MHz)
Intermodulation 2V8 BP
-120
-100
-80
-60
-40
-20
0
Outp
ut P
ow
er
(dB
m)
862 MHz-82.1
861 MHz-14.7
859 MHz-82.0
860 MHz-14.7
Broadband LNA for Mobile TV and FM Radio Applications
Evaluation Board and Layout Information
Application Note AN441 29 Revision 1.1, 2016-09-01
5 Evaluation Board and Layout Information In this application note, the following PCB is used:
PCB Marking: M150831
PCB material: <FR4 >
r of PCB material: <4.8>
Figure 32 Photo Picture of Evaluation Board (overview) <PCB Marking M150831 Rev.1.0>
Figure 33 Photo Picture of Evaluation Board (detailed view)
Broadband LNA for Mobile TV and FM Radio Applications
Evaluation Board and Layout Information
Application Note AN441 30 Revision 1.1, 2016-09-01
Figure 34 PCB Layer Information
Copper 35µm
FR4, 0.2mm
FR4, 0.8mm
Vias Vias
Broadband LNA for Mobile TV and FM Radio Applications
Authors
Application Note AN441 31 Revision 1.1, 2016-09-01
6 Authors Xiang Li, Application Engineer of Business Unit “RF and Sensor Devices”
7 Reference [1] Application Guide for Mobile Communications 2015, Infineon Technologies, Business Unit RF and
Sensors
[2] https://en.wikipedia.org/wiki/FM_broadcasting
[3] FM broadcasting frequencies: most of the countries transmit FM signals between 87.5 MHz – 108 MHz; a
few other countries transmit FM signals at 66 MHz – 74 MHz and 76 MHz – 90 MHz. http://www.itu.int/dms_pubrec/itu-r/rec/bs/R-REC-BS.450-3-200111-I!!PDF-E.pdf
Revision History
Major changes since the last revision
Page or Reference Description of change
8 - 28 Removed the 1000 MHz measurement point, added the measurement point 860 MHz
for mobile TV application, updated measurement results
7- 28 Measurement results updated with results from final samples
Published by
Infineon Technologies AG
81726 Munich, Germany
© 2016 Infineon Technologies AG. All Rights Reserved.
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aspect of this document?
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Edition 2016-09-01
AN_201509_PL32_002