BF P650 Dri v er Amplifier fo r 900 MHz I S M Applic atio ns Application Note AN208 Revision: Rev. 1.0 2010-08-06 RF and Protecti on Devi c es Edition 2010-08-06 Published by Infineon Technologies AG 81726 Munich, Germany © 2010 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. BFP650 Driver Amplifier for 900MHz ISM Applications Application Note AN208 Revision History: 2010-08-06 Previous Revision: no previous revision Page Subjects (major changes since last revision) Trademarks of Infineon Technologies AG A-GOLD™, BlueMoon™, COMNEON™, CONVERGATE™, COSIC™, C166™, CROSSAVE™, CanPAK™, CIPOS™, CoolMOS™, CoolSET™, CONVERPATH™, CORECONTROL™, DAVE™, DUALFALC™, DUSLIC™, EasyPIM™, EconoBRIDGE™, EconoDUAL™, EconoPACK™, EconoPIM™, E-GOLD™, EiceDRIVER™, EUPEC™, ELIC™, EPIC™, FALC™, FCOS™, FLEXISLIC™, GEMINAX™, GOLDMOS™, HITFET™, HybridPACK™, INCA™, ISAC™, ISOFACE™, IsoPACK™, IWORX™, M-GOLD™, MIPAQ™, ModSTACK™, MUSLIC™, my-d™, NovalithIC™, OCTALFALC™, OCTAT™, OmniTune™, OmniVia™, OptiMOS™, OPTIVERSE™, ORIGA™, PROFET™, PRO-SIL™, PrimePACK™, QUADFALC™, RASIC™, ReverSave™, SatRIC™, SCEPTRE™, SCOUT™, S-GOLD™, SensoNor™, SEROCCO™, SICOFI™, SIEGET™, SINDRION™, SLIC™, SMARTi™, SmartLEWIS™, SMINT™, SOCRATES™, TEMPFET™, thinQ!™, TrueNTRY™, TriCore™, TRENCHSTOP™, VINAX™, VINETIC™, VIONTIC™, WildPass™, X-GOLD™, XMM™, X-PMU™, XPOSYS™, XWAY™. Other Trademarks AMBA™, ARM™, MULTI-ICE™, PRIMECELL™, REALVIEW™, THUMB™ 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. Mifare™ of NXP. MIPI™ of MIPI Alliance, Inc. MIPS™ of MIPS Technologies, Inc., USA. muRata™ of MURATA MANUFACTURING CO. OmniVision™ of OmniVision Technologies, Inc. Openwave™ Openwave Systems Inc. RED HAT™ Red Hat, Inc. RFMD™ RF Micro Devices, Inc. SIRIUS™ of Sirius Sattelite 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 2009-10-19 Application Note AN208, Rev. 1.0 3 / 16 2010-08-06 BFP650 Driver Amplifier for 900MHz ISM Applications List of Content, Figures and Tables Table of Content 1 Introduction ........................................................................................................................................5 2 Application Information .....................................................................................................................8 3 Typical Measurement Results...........................................................................................................9 4 Measured Graphs .............................................................................................................................10 5 Evaluation Board and layout Information......................................................................................14 Authors..............................................................................................................................................15 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 BFP650 in SOT343 Package ...............................................................................................................5 Application Diagram of a RX-TX base station......................................................................................6 Power transmission using BFP650 for 900MHz application ................................................................7 Schematics of the application circuit ....................................................................................................8 Insertion power gain of the BFP650 driver for 900MHz application...................................................10 Input 1dB Compression point of the BFP650 driver for 900MHz application ....................................10 Input matching of the BFP650 driver for 900MHz application ...........................................................11 Output matching of the BFP650 driver for 900MHz application.........................................................11 Reverse isolation of the BFP650 driver for 900MHz application .......................................................12 Stability K-factor of the BFP650 driver for 900MHz application.........................................................12 rd 3 order intercept point of the BFP650 driver for 900MHz application ..............................................13 Input and output Z-Parameters of the BFP650 driver for 900MHz application ..................................13 Photo Picture of Evaluation Board .....................................................................................................14 PCB Layer Information .......................................................................................................................14 List of Tables Table 1 Table 2 Table 3 Pin definition.........................................................................................................................................5 Bill-of-Materials.....................................................................................................................................8 Summary of Measurement results (at room temperature) ...................................................................9 Application Note AN208, Rev. 1.0 4 / 16 2010-08-06 BFP650 Driver Amplifier for 900MHz ISM Applications Introduction 1 Introduction 1.1 Features • • • For High output power drivers Ideal for low phase noise oscillators 70GHz ft Silicon Germanium Technology Figure 1 Table 1 Pin BFP650 in SOT343 Package Pin definition Pin name comments 1 B Base of the BFP650 transistor 2 E Emitter of the BFP650 transistor 3 C Collector of the BFP650 transistor 4 E Emitter of the BFP650 transistor Application Note AN208, Rev. 1.0 5 / 16 2010-08-06 BFP650 Driver Amplifier for 900MHz ISM Applications Introduction 1.2 Applications BFP650 from Infineon Technologies is an SiGe:C Heterojunction bipolar transistor dedicated for high power driver amplifier applications. Thus, this component fits to many applications related to signal transmission like GSM/UMTS/Edge/LTE/WCDMA Base stations. On those conditions of use, the transmission module needs a strong signal and moreover, a good linearity in order to achieve the GSM/UMTS/Edge/LTE/WCDMA standards requirements. This documentation presents the BFP650 performance in a driver configuration for 900MHz application. This structure can also be used for 868 MHz ISM band applications and Zigbee. The following schematic presents a GSM/UMTS/Edge/LTE/WCDMA RX-TX base station structure. The amplifier structure using BFP650 is in driver configuration. That means that the amplifier is placed in front of a power amplifier. In this manner, the amplifier uses a higher current to provide high linearity characteristics. Such structure is essential in order to send a strong power signal to the receiver part. On figure 2, the diagram presents a wide range of Infineon components able to fit to a base station application. Figure 2 Application Diagram of a RX-TX base station Application Note AN208, Rev. 1.0 6 / 16 2010-08-06 BFP650 Driver Amplifier for 900MHz ISM Applications Introduction 1.3 Linearity Consideration Infineon’s BFP650 shows a high linearity behaviour and presents an input 1dB compression point of 5.9 dBm in the application circuit.. This power linearity has to be high enough in order to amplify the signal linearly. A too small input 1dB compression point would limit the gain of the first stage and thus, create a power loss on the transmission chain (Please see the figure 3). It is also the same case for the output of the driver if this one has too high 1dB compression Point. In such configuration, the Power amplifier would limit the power of the signal. Therefore, the output 1dB compression point power of a stage has to be lower than the input 1dB compression point power of the next stage. Figure 3 Power transmission using BFP650 for 900MHz application This application note provides the actual results of the BFP650 as driver from Infineon Technologies for 900MHz applications. This driver brings a gain of about 24.3 dB with a noise figure of about 2.4 dB (SMA connectors and PCB losses of 0.10 dB included) at the frequency of 900MHz. Furthermore, this device provides an unconditional stability from 0 up to 10 GHz. The circuit is matched at Input to 50Ω with an input return loss better than13 dB and an output return loss of 10.0 dB (please refer to table 1). The output -1dB compression point is measured as high as 17.3 dBm. Using two tones separated of 1MHz at 900MHz, the input 3rd order intercept point (IIP3) reaches +6.35 dBm. Application Note AN208, Rev. 1.0 7 / 16 2010-08-06 BFP650 Driver Amplifier for 900MHz ISM Applications Application Information 2 Application Information 2.1 Schematics Figure 4 Schematics of the application circuit Table 2 Bill-of-Materials Symbol Value Unit Size Manufacturer Comment C1 47 pF 0402 Various DC Block/input matching C2 6.2 pF 0402 Various DC Block/input matching C3 22 nF 0402 Various RF to ground C4 22 nF 0402 Various RF to ground C5 47 pF 0402 Various DC Block/ output matching L1 4.7 nH 0402 Murata LQG series Input matching L2 33 nH 0402 Murata LQG series DC feed/input matching L3 7.5 nH 0402 Murata LQG series DC feed/output matching R1 3.9 kΩ 0402 Various Base collector settings R2 0 Ω 0402 Various Jumper R3 2.7 Ω 0402 Various DC feed to collector / stability Q1 Application Note AN208, Rev. 1.0 SOT343 Infineon Technologies SiGe C: bipolar transistor 8 / 16 2010-08-06 BFP650 Driver Amplifier for 900MHz ISM Applications Typical Measurement Results 3 Typical Measurement Results Table 3 Summary of Measurement results (at room temperature) Vcc=2.8V, Ic=76mA, freq=900MHz Parameter Symbol Value Unit Frequency Range Freq 900 MHz DC Voltage Vcc 2.8 V DC Current Icc 76 mA Gain G 24.3 dB Input P1dB IP1dB -5.9 dBm Output P1dB OP1dB 17.3 dBm Input Return Loss RLin 13.2 dB Output Return Loss RLout 10.0 dB Reverse Isolation IRev 28.7 dB Input IP3 IIP3 6.35 dBm Output IP3 OIP3 30.65 dBm Noise Figure NF 2.4 dB Stability k >1 -- Comment/Test Condition Input Power sweep from Pin=-30…0dBm Input Power Pin=-30dBm Pin=-30dBm, f1=900MHz, f2=901MHz Unconditionnally stable from 0 to 10GHz Note: the measurements showed in Table 3 are including the PCB and SMA losses of 0.1dB. Application Note AN208, Rev. 1.0 9 / 16 2010-08-06 BFP650 Driver Amplifier for 900MHz ISM Applications Measured Graphs 4 Measured Graphs Insertion Power Gain InBand 30 900 MHz 24.33 dB 25 20 15 10 5 0 0 Figure 5 1000 2000 3000 4000 Frequency (MHz) 5000 6000 Insertion power gain of the BFP650 driver for 900MHz application Compression point at 1dB 30 -30 dBm 24.22 dB -5.867 dBm 23.22 dB Gain(dB) 25 20 15 10 -30 Figure 6 -25 -20 -15 Pin (dBm) -10 -5 0 Input 1dB Compression point of the BFP650 driver for 900MHz application Application Note AN208, Rev. 1.0 10 / 16 2010-08-06 BFP650 Driver Amplifier for 900MHz ISM Applications Measured Graphs Input Matching 0 -5 -10 900 MHz -13.24 dB -15 -20 -25 0 Figure 7 500 1000 1500 2000 2500 3000 3500 4000 4500 5000 5500 6000 Frequency (MHz) Input matching of the BFP650 driver for 900MHz application Output Matching 0 -5 -10 900 MHz -9.999 dB -15 -20 -25 -30 0 Figure 8 500 1000 1500 2000 2500 3000 3500 4000 4500 5000 5500 6000 Frequency (MHz) Output matching of the BFP650 driver for 900MHz application Application Note AN208, Rev. 1.0 11 / 16 2010-08-06 BFP650 Driver Amplifier for 900MHz ISM Applications Measured Graphs Reverse Isolation 50 40 30 900 MHz 28.72 dB 20 10 0 0 Figure 9 500 1000 1500 2000 2500 3000 3500 4000 4500 5000 5500 6000 Frequency (MHz) Reverse isolation of the BFP650 driver for 900MHz application Stability K Factor 5 4 3 696.81 MHz 1.025 2 1 0 0 Figure 10 2000 4000 6000 Frequency (MHz) 8000 10000 Stability K-factor of the BFP650 driver for 900MHz application Application Note AN208, Rev. 1.0 12 / 16 2010-08-06 BFP650 Driver Amplifier for 900MHz ISM Applications Measured Graphs Figure 11 rd 3 order intercept point of the BFP650 driver for 900MHz application Z Parameters Input output matching 0.8 1.0 Swp Max 910MHz 2. 0 6 0. Z11 0. 4 Z22 3. 0 0 4. 10.0 10.0 5.0 4.0 3.0 2.0 1.0 0.8 0.6 0.4 0 0.2 0.2 900 MHz r 0.882519 x -0.392331 5.0 900 MHz r 1.74593 x -0.468807 -10.0 2 -4 .0 -5. 0 .0 4 Figure 12 -2 -1.0 -0.8 -0 .6 .0 . -0 -3 -0. Swp Min 890MHz Input and output Z-Parameters of the BFP650 driver for 900MHz application Application Note AN208, Rev. 1.0 13 / 16 2010-08-06 BFP650 Driver Amplifier for 900MHz ISM Applications Evaluation Board and layout Information 5 Evaluation Board and layout Information Figure 13 Photo Picture of Evaluation Board Figure 14 PCB Layer Information Application Note AN208, Rev. 1.0 14 / 16 2010-08-06 BFP650 Driver Amplifier for 900MHz ISM Applications Authors Authors Anthony Thomas, RF Engineer of Business Unit “RF and Protection Devices” Dr.Chih-I Lin, Senior Staff engineer of Business Unit “RF and Protection Devices” Application Note AN208, Rev. 1.0 15 / 16 2010-08-06 w w w . i n f i n e o n . c o m Published by Infineon Technologies AG AN208