BF P840 E SD Low N ois e A mplifi er f or 5 to 6 G Hz WLA N Ap plicatio n us ing BF P84 0E S D with 2. 4 G Hz Rejec ti on Applic atio n N ote A N 317 Revision: Rev. 1.0 2013-05-22 RF and P r otecti on D evic es Edition 2013-05-22 Published by Infineon Technologies AG 81726 Munich, Germany © 2013 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. BFP840ESD Low Noise Amplifier for 5 to 6 GHz WLAN Application Application Note AN317 Revision History: 2013-05-22 Previous Revision: No previous revision 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 Advanced 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 Application Note AN317, Rev. 1.0 3 / 22 2013-05-22 BFP840ESD Low Noise Amplifier for 5 to 6 GHz WLAN Application List of Content, Figures and Tables Table of Content 1 1.1 Introduction ........................................................................................................................................ 5 ® Wi-Fi ................................................................................................................................................... 5 2 2.1 2.2 BFP840ESD Overview ........................................................................................................................ 7 Features ............................................................................................................................................... 7 Key Applications of BFP840ESD ......................................................................................................... 7 3 3.1 3.2 3.3 Low Noise Amplifier for 5 to 6 GHz WLAN with BFP840ESD ........................................................ 8 Description ........................................................................................................................................... 8 Performance Overview ....................................................................................................................... 10 Schematics and Bill-of-Materials ........................................................................................................ 11 4 Measured Graphs ............................................................................................................................. 12 5 Evaluation Board and Layout Information .................................................................................... 19 6 Authors .............................................................................................................................................. 21 7 Remark .............................................................................................................................................. 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 ® 5 – 6 GHz Wi-Fi Wireless LAN (WLAN, IEEE802.11a/n) and WiMAX (IEEE802.16e) Front-End ..... 5 BFP840ESD in SOT343 ....................................................................................................................... 7 Package and pin connections of BFP840ESD in Topview .................................................................. 8 Schematic Diagram of the used Circuit .............................................................................................. 11 Insertion Power Gain of the 5-6 GHz WLAN LNA with BFP840ESD ................................................. 12 Wideband Insertion Power Gain of the 5-6 GHz WLAN LNA with BFP840ESD ............................... 12 Noise Figure of BFP840ESD LNA for 5100 - 5900 MHz ................................................................... 13 Reverse Isolation of the 5-6 GHz WLAN LNA with BFP840ESD ...................................................... 13 Input Matching of the 5-6 GHz WLAN LNA with BFP840ESD ........................................................... 14 Input Matching of the 5-6 GHz WLAN LNA with BFP840ESD (Smith Chart) .................................... 14 Output Matching of the 5-6 GHz WLAN LNA with BFP840ESD ........................................................ 15 Output Matching of the 5-6 GHz WLAN LNA with BFP840ESD (Smith Chart) ................................. 15 Wideband Stability k Factor of the 5-6 GHz WLAN LNA with BFP840ESD ...................................... 16 Wideband Stability Mu Factor of the 5-6 GHz WLAN LNA with BFP840ESD ................................... 16 Input 1dB Compression Point of the BFP840ESD Circuit at 5500 MHz ............................................ 17 rd Output 3 Order Intercept Point of BFP840ESD at 5500 MHz (LNA input power = -30 dBm) .......... 17 OFF-Mode (Vcc = 0V, Icc = 0mA) S21 of the 5-6 GHz WLAN LNA with BFP840ESD ..................... 18 Photo of the BFP840ESD 5-6 GHz WLAN LNA Evaluation Board .................................................... 19 Zoom-In Picture of the BFP840ESD 5-6 GHz WLAN LNA Evaluation Board ................................... 19 Layout Proposal for RF Grounding of the 5-6 GHz WLAN LNA with BFP840ESD ........................... 20 PCB Layer Information ....................................................................................................................... 20 List of Tables Table 1 Table 2 Summary of Measurement Results .................................................................................................... 10 Bill-of-Materials................................................................................................................................... 11 Application Note AN317, Rev. 1.0 4 / 22 2013-05-22 BFP840ESD Low Noise Amplifier for 5 to 6 GHz WLAN Application Introduction 1 Introduction 1.1 Wi-Fi® Wireless Fidelity (Wi-Fi®) plays a major role in today’s communications by enabling constant connection in the 2.4 GHz, 5 GHz bands and broadband Internet access for users with laptops or devices equipped with wireless network interface while roaming within the range of fixed access points (AP) or a public hotspot. Different applications like home entertainment with wireless high-quality multimedia signal transmission, home networking notebooks, mass data storages and printers implement 5–6 GHz Wi-Fi® into their system to offer high-speed wireless connectivity. When wider coverage areas are needed and especially when a higher order modulation scheme is used such as in emerging very high throughput wireless specifications like 256 Quadrature Amplitude Modulation (QAM) in IEEE 802.11ac, the Signal-to-Noise Ratio (SNR) requirements for both the AP and the client are more stringent. For this kind of high-speed high data rate wireless communication standards, it is essential to ensure the quality of the link path. Major performance criteria of these equipments have to be fulfilled: sensitivity, strong signal capability and interference immunity. Below a general application diagram of a WLAN system is shown. WLAN/WiMAX: 4.9 – 5.9 GHz BPF LNA SPDT Switch Power Detector BPF PA WLAN/ WiMAX Transceiver IC ESD Diode Figure 1 ® 5 – 6 GHz Wi-Fi Wireless LAN (WLAN, IEEE802.11a/n) and WiMAX (IEEE802.16e) Front-End Application Note AN317, Rev. 1.0 5 / 22 2013-05-22 BFP840ESD Low Noise Amplifier for 5 to 6 GHz WLAN Application Introduction In order to increase the system sensitivity, an excellent Low Noise Amplifier (LNA) in front of the receiver is mandatory, especially in an environment with very weak signal strength and because of the insertion loss of the Single Pole, Double Throw (SPDT) switch and the Bandpass Filter (BPF) or diplexer. The typical allowed receiver chain Noise Figure (NF) of approx. 2 dB can only be achieved by using a high-gain low noise amplifier. In addition, strong signal environment can exist when the equipment is next to a transmitter. In that case, the LNA must be linear enough, i.e. have high 1dB compression point. This avoids saturation, degradation of the gain and increased noise figure. This application note is focusing on the LNA block, but Infineon does also support with RFswitches, TVS-diodes for ESD protection and RF Schottky diodes for power detection. Application Note AN317, Rev. 1.0 6 / 22 2013-05-22 BFP840ESD Low Noise Amplifier for 5 to 6 GHz WLAN Application BFP840ESD Overview 2 BFP840ESD Overview 2.1 Features • Robust very low noise amplifier based on Infineon´s reliable, high volume SiGe:C technology • Unique combination of high end RF performance and robustness: 20 dBm maximum RF input power, 1.5 kV HBM ESD hardness • Very high transition frequency fT = 80 GHz enables very low noise figure at high frequencies: NFmin = 0.85 dB at 5.5 GHz, 1.8 V, 6 mA 2 • High gain |S21| = 18.5 dB at 5.5 GHz, 1.8 V, 10 mA • OIP3 = 23 dBm at 5.5 GHz, 1.5 V, 6 mA • Ideal for low voltage applications e.g. VCC = 1.2 V and 1.8 V (2.85 V, 3.3 V, 3.6 V requires corresponding collector resistor) • Low power consumption, ideal for mobile applications • Easy to use Pb free (RoHS compliant) and halogen free industry standard package with visible leads 2.2 Figure 2 BFP840ESD in SOT343 Key Applications of BFP840ESD As Low Noise Amplifier (LNA) in • Mobile and fixed connectivity applications: WLAN 802.11, WiMAX and UWB • Satellite communication systems: satellite radio (SDARs, DAB), navigation systems (e.g. GPS, GLONASS) and C-band LNB (1st and 2nd stage LNA) • Ku-band LNB front-end (2nd stage or 3rd stage LNA and active mixer) • Ka-band oscillators (DROs) Application Note AN317, Rev. 1.0 7 / 22 2013-05-22 BFP840ESD Low Noise Amplifier for 5 to 6 GHz WLAN Application Low Noise Amplifier for 5 to 6 GHz WLAN with BFP840ESD 3 Low Noise Amplifier for 5 to 6 GHz WLAN with BFP840ESD 3.1 Description BFP840ESD is a discrete hetero-junction bipolar transistor (HBT) specifically designed for high performance 5 GHz band low noise amplifier (LNA) solutions for Wi-Fi connectivity applications. It combines the 80 GHz fT silicon-germanium:carbide (SiGe:C) B9HFM process with special device geometry technique to reduce the parasitic capacitance between substrate and transistor that degrades high-frequency characteristics, resulting in an inherent input matching and a major improvement in power gain in 5 GHz band together with a low noise figure performance. The BFP840ESD has an integrated 1.5 kV HBM ESD protection which makes the device robust against electrostatic discharge and extreme RF input power. The device offers its high performance at low current and voltage and is especially well-suited for portable battery powered applications in which low energy consumption is a key requirement. The BFP840ESD is housed in the industry standard SOT343 package with visible leads. Further variants are available in flat-lead TSFP-4-1 package (BFP840FESD) and in the lowheight 0.31mm TSLP-3-9 package (BFR840L3RHESD) specially fitting into modules. Figure 3 shows the pin assignment of package of BFP840ESD in the top view: B 1 4 E XYs E 2 3 C BFPXXX Figure 3 Package and pin connections of BFP840ESD in Topview Application Note AN317, Rev. 1.0 8 / 22 2013-05-22 BFP840ESD Low Noise Amplifier for 5 to 6 GHz WLAN Application Low Noise Amplifier for 5 to 6 GHz WLAN with BFP840ESD This application note presents the measurement results of the LNA using BFP840ESD for 5100 MHz to 5900 MHz WLAN applications, with 2.4 GHz notch filter. Proper RF grounding on PCB has to be ensured in order to achieve stability k-factor ≥ 1 above 8.5 GHz (Figure 21). The application circuit requires 12 passive 0402 Surface Mounted Device (SMD) components and achieves the gain from 16.2 dB to 15.6 dB over the frequency band. The NF varies from 1.1 dB to 1.22 dB (SMA and PCB losses are subtracted) over the frequency band. The circuit achieves an input and output return loss better than 12.2 dB. Furthermore, the circuit is unconditionally stable from 10 MHz to 15 GHz. At 5.5 GHz, -9.3 dBm input compression point (IP1dB) is achieved, together with the 16.8 dBm output third intercept point (OIP3) measured with 1MHz tone spacing. In the off mode this circuit has 1dB input compression point more than 10 dBm for the whole frequency band. The BFP840ESD could help you build a high-performance cost-effective solution for your upcoming 5GHz WLAN IEEE802.11a/n/ac designs. Application Note AN317, Rev. 1.0 9 / 22 2013-05-22 BFP840ESD Low Noise Amplifier for 5 to 6 GHz WLAN Application 3.2 Performance Overview Device: BFP840ESD Application: Low Noise Amplifier for 5 to 6 GHz WLAN Application PCB Marking: M130121 BFP840ESD SOT343 (0.4mm x 2) Table 1 Summary of Measurement Results Parameter Symbol Value Unit DC Voltage VCC 3.0 V DC Current ICC 11.2 mA Note/Test Condition Frequency Range Freq 2400 5100 5500 5900 MHz ON-Mode Gain GON -9 16.2 16.3 15.6 dB OFF-Mode Gain GOFF - -25 -26.2 -27.5 dB Vcc = 0 V, Icc = 0 mA Noise Figure NF - 1.1 1.17 1.22 dB SMA and PCB losses (~0.12 dB) are subtracted Input Return Loss RLin - 12.2 15.4 20.3 dB Output Return Loss RLout - 20.3 17 13 dB Reverse Isolation IRev - 25.7 24.9 24.3 dB ON-Mode Input P1dB IP1dBON 5 -9.5 -9.3 -9.2 dBm OFF-Mode Input P1dB IP1dBOFF - >10 >10 >10 dBm OP1dB -5 5.7 6 5.4 dBm Output P1dB Input IP3 Output IP3 Stability IIP3 0.5 Vcc = 0 V, Icc = 0 mA dBm OIP3 16.8 dBm Power @ Input: -30 dBm f1= 5500 MHz, f2= 5501 MHz k >1 -- Stability measured from 10 MHz to 15 GHz Application Note AN317, Rev. 1.0 10 / 22 2013-05-22 BFP840ESD Low Noise Amplifier for 5 to 6 GHz WLAN Application 3.3 Schematics and Bill-of-Materials Vcc= 3.0 V J3 DC Connector All passives are “0402“ case size Inductors: LQG Series Capacitors: Various I = 11.2 mA C3 39 pF R2 43 Ω R1 39 kΩ C4 39 pF R3 82 Ω L1 5.1 nH 2 pF L3 1.2 nH A proper RF grounding is required to ensure the LNA performance. Please refer to Chapter 5 for the layout proposal. PCB = M130121 BFP840ESD SOT343 (0.4mm x 2) PCB Board Material = Standard FR4 Layer spacing (top RF to internal ground plane): 0.2 mm Table 2 Symbol J2 RF Port2 OUTPUT R4 5.1 Ω C5 Figure 4 C2 10 pF Q1 BFP840ESD C1 3.3 pF J1 RF Port1 INPUT L2 2.2 nH Total Component Count = 11 including BFP840ESD transistor Inductors = 3 (Low Q) Resistors = 4 Capacitors = 5 Schematic Diagram of the used Circuit Bill-of-Materials Value Unit Size Manufacturer Comment C1 3.3 pF 0402 Various Input DC block, Noise & input matching C2 10 pF 0402 Various Output DC block & output matching C3, C4 39 pF 0402 Various C5 2 pF 0402 Various RF decoupling / blocking cap Input matching & 2.4 GHz rejection L1 5.1 nH 0402 Murata LQG series Noise & input matching L2 2.2 nH 0402 Murata LQG series L3 1.2 nH 0402 Murata LQG series Output matching & high frequency stability improvement Input matching & 2.4 GHz rejection R1 39 kΩ 0402 Various DC biasing R2 43 Ω 0402 Various R3 82 Ω 0402 Various DC biasing (provides DC negative feedback to stabilize DC operating point over temperature variation, transistor hFE variation, etc.) Stability improvement & output matching R4 5.1 Ω 0402 Various High frequency stability improvement Infineon Technologies BFP840ESD SiGe:C HBT Q1 Application Note AN317, Rev. 1.0 SOT343 11 / 22 2013-05-22 BFP840ESD Low Noise Amplifier for 5 to 6 GHz WLAN Application Measured Graphs 4 Measured Graphs Insertion Power Gain (Narrowband) 25 20 5.5 GHz 16.27 dB 15 5.1 GHz 16.72 dB 5.9 GHz 15.64 dB 10 5 0 4 Figure 5 4.5 5 5.5 Frequency (GHz) 6 6.5 7 Insertion Power Gain of the 5-6 GHz WLAN LNA with BFP840ESD Insertion Power Gain (Wideband) 25 15 5.1 GHz 16.72 dB 5 5.5 GHz 16.27 dB -5 2.4 GHz -9.019 dB -15 5.9 GHz 15.64 dB 2.45 GHz -10.58 dB -25 0 Figure 6 2 4 6 Frequency (GHz) 8 10 Wideband Insertion Power Gain of the 5-6 GHz WLAN LNA with BFP840ESD Application Note AN317, Rev. 1.0 12 / 22 2013-05-22 BFP840ESD Low Noise Amplifier for 5 to 6 GHz WLAN Application Measured Graphs Noise Figure 1.4 1.3 5.5 GHz 1.17 1.2 5.9 GHz 1.22 1.1 5.1 GHz 1.1 1 0.9 0.8 5 Figure 7 5.2 5.4 5.6 Frequency (GHz) 5.8 6 Noise Figure of BFP840ESD LNA for 5100 - 5900 MHz Reverse Isolation -20 5.5 GHz -24.86 dB -25 5.1 GHz -25.71 dB 5.9 GHz -24.29 dB -30 -35 -40 3 Figure 8 4 5 Frequency (GHz) 6 7 Reverse Isolation of the 5-6 GHz WLAN LNA with BFP840ESD Application Note AN317, Rev. 1.0 13 / 22 2013-05-22 BFP840ESD Low Noise Amplifier for 5 to 6 GHz WLAN Application Measured Graphs Input Return Loss 0 -5 5.1 GHz -12.15 dB -10 5.9 GHz -20.31 dB -15 5.5 GHz -15.35 dB -20 -25 3 Figure 9 4 5 Frequency (GHz) 6 7 Input Matching of the 5-6 GHz WLAN LNA with BFP840ESD Swp Max 7GHz 2. 0 6 0. 0.8 1.0 Input Return Loss (Smith Chart) 5.5 GHz r 0.747156 x 0.160744 0. 4 0 4. 5.0 10.0 10.0 5.0 4.0 3.0 5.9 GHz r 0.930634 x 0.173769 2.0 1.0 0.8 0.4 0.2 5.1 GHz r 0.609578 x 0.0765722 0.6 0.2 0 0 3. -10.0 2 -0. 4 .0 -5. 0 -3 .0 Figure 10 .0 -2 -1.0 -0.8 -0 .6 .4 -0 Swp Min 3GHz Input Matching of the 5-6 GHz WLAN LNA with BFP840ESD (Smith Chart) Application Note AN317, Rev. 1.0 14 / 22 2013-05-22 BFP840ESD Low Noise Amplifier for 5 to 6 GHz WLAN Application Measured Graphs Output Return Loss -5 5.9 GHz -13.02 dB -10 5.5 GHz -16.95 dB -15 -20 5.1 GHz -20.34 dB -25 3 Figure 11 4 5 Frequency (GHz) 6 7 Output Matching of the 5-6 GHz WLAN LNA with BFP840ESD Swp Max 7GHz 2. 0 6 0. 0.8 1.0 Output Return Loss (Smith Chart) 5.9 GHz r 1.1 x 0.469979 0 3. 0 4. 0. 4 5.0 10.0 -3 .0 .0 -2 -1.0 -0.8 -0 .6 .4 -0 Figure 12 5.0 4.0 3.0 2.0 1.0 0.8 0.6 0.4 5.5 GHz r 0.941937 x 0.272442 2 -0. 4 .0 -5. 0 0 10.0 -10.0 0.2 0.2 5.1 GHz r 0.86162 x 0.113948 Swp Min 3GHz Output Matching of the 5-6 GHz WLAN LNA with BFP840ESD (Smith Chart) Application Note AN317, Rev. 1.0 15 / 22 2013-05-22 BFP840ESD Low Noise Amplifier for 5 to 6 GHz WLAN Application Measured Graphs Stability k Factor 2.5 2 1.5 8.723 GHz 1.093 1 0.5 0 Figure 13 2.5 5 7.5 Frequency (GHz) 10 12.5 15 Wideband Stability k Factor of the 5-6 GHz WLAN LNA with BFP840ESD Stability Mu Factor 3 Mu1 factor Mu1 factor 2.5 2 1.5 1 0.1786 GHz 1.311 0.5 8.873 GHz 1.082 0.1505 GHz 1 0 0.1 5.1 10.1 15 Frequency (GHz) Figure 14 Wideband Stability Mu Factor of the 5-6 GHz WLAN LNA with BFP840ESD Application Note AN317, Rev. 1.0 16 / 22 2013-05-22 BFP840ESD Low Noise Amplifier for 5 to 6 GHz WLAN Application Measured Graphs Input 1dB Compression Point 18 16 -30 dBm 16.3 14 -9.291 dBm 15.3 12 10 8 -30 Figure 15 -25 -20 -15 Power (dBm) -10 -5 0 Input 1dB Compression Point of the LNA with BFP840ESD at 5500 MHz Output 3rd Order Intercept Point 0 5.501 GHz -13.81 5.5 GHz -13.79 -20 -40 5.499 GHz -74.8 -60 5.502 GHz -75.73 -80 -100 -120 5.498 Figure 16 5.499 5.5 5.501 Frequency (GHz) 5.502 5.503 rd Output 3 Order Intercept Point of LNA with BFP840ESD at 5500 MHz (LNA input power = 30 dBm) Application Note AN317, Rev. 1.0 17 / 22 2013-05-22 BFP840ESD Low Noise Amplifier for 5 to 6 GHz WLAN Application Measured Graphs Off-Mode Insertion Power Gain -20 5.5 GHz -26.24 dB -25 5.1 GHz -24.99 dB 5.9 GHz -27.48 dB -30 -35 4 Figure 17 4.5 5 5.5 Frequency (GHz) 6 6.5 7 OFF-Mode (Vcc = 0V, Icc = 0mA) Insertion Power Gain of the 5-6 GHz WLAN LNA with BFP840ESD Off-Mode Input 1dB Compression Point -18 -20 9.913 dBm -20.03 -22 -24 -24.95 dBm -26.06 -26 -28 -25 Figure 18 -20 -15 -10 -5 Power (dBm) 0 5 10 OFF-Mode Input 1dB Compression of the 5-6 GHz WLAN LNA with BFP840ESD at 5500 MHz Application Note AN317, Rev. 1.0 18 / 22 2013-05-22 BFP840ESD Low Noise Amplifier for 5 to 6 GHz WLAN Application Evaluation Board and Layout Information 5 Evaluation Board and Layout Information Figure 19 Photo of the BFP840ESD 5-6 GHz WLAN LNA Evaluation Board Figure 20 Zoom-In Picture of the BFP840ESD 5-6 GHz WLAN LNA Evaluation Board Application Note AN317, Rev. 1.0 19 / 22 2013-05-22 BFP840ESD Low Noise Amplifier for 5 to 6 GHz WLAN Application Evaluation Board and Layout Information 0.4 mm B 0.4 mm E 0.4 mm BFP840ESD E 0.2 mm C 0.4 mm 0.3 mm via diameter Figure 21 Layout Proposal for RF Grounding of the 5-6 GHz WLAN LNA with BFP840ESD Vias FR4 Core, 0.2mm Copper 35µm Figure 22 FR4 Prepreg, 0.8mm PCB Layer Information Application Note AN317, Rev. 1.0 20 / 22 2013-05-22 BFP840ESD Low Noise Amplifier for 5 to 6 GHz WLAN Application Authors 6 Authors Moakhkhrul Islam, Application Engineer of Business Unit “RF and Protection Devices” Shamsuddin Ahmed, Application Engineer of Business Unit “RF and Protection Devices” Dr. Chih-I Lin, Senior Staff Engineer/Technical Marketing RF of Business Unit “RF and Protection Devices” 7 Remark The graphs are generated with the simulation program AWR Microwave Office®. Application Note AN317, Rev. 1.0 21 / 22 2013-05-22 w w w . i n f i n e o n . c o m Published by Infineon Technologies AG AN317