BGB741L7 L N A u s i ng B G B 7 4 1 L 7 f o r F M/ VH F / UH F 76-8 80 M Hz Ap plicat ions Technic al Rep ort T R 142 Revision: V1.0 Date: 29 July 2009 RF and protecti on Devic es Edition 29 July 2009 Published by Infineon Technologies AG 81726 Munich, Germany © 2009 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. Technical Report TR142 LNA using BGB741L7 for FM/VHF/UHF 76-880MHz Applications TR142 Revision History: 29 July 2009 Previous Revision: No Revision Page Technical Report, TR142 3 / 12 29 July 2009 Technical Report TR142 LNA using BGB741L7 for FM/VHF/UHF 76-880MHz Applications 1 Overview Device : BGB741L7 Application: LNA using BGB741L7 for FM/VHF/UHF 76-880MHz Applications PCB Marking: BGB707L7ESD V1.0 2 Summary of Measurement Results Table 1 Summary of Measurement Results Parameter Symbol Value Unit Note/Test Condition DC Voltage Vcc 3 V Icc mA 6.0 mA Frequency Range Freq FM UHF 76-108 470-880 MHz Gain G 17.7 17.2 dB Power@Port1: -30dBm Noise Figure NF 1.4 1.45 dB Including SMA connectors and PCB losses of 0.1dB Input Return Loss RLin 8.9 14.4 dB Output Return Loss RLout 11.8 11.3 dB Reverse Isolation IRev 22.2 21.9 dB Input P1dB IP1dB -5.7 -4.1 dBm Output P1dB OP1dB 11 12.3 dBm Power@Port2:-30dBm Power@Input: -30dBm @100/101MHz for FM Input IP3 IIP3 -2 0.8 dBm Power@Input: -30dBm @675/676MHz for UHF ∆f =1MHz Output IP3 OIP3 Stability k Technical Report, TR142 15.7 18.0 >1 dBm -- 4 / 12 Stability measured from 10MHz to 10GHz 29 July 2009 Technical Report TR142 LNA using BGB741L7 for FM/VHF/UHF 76-880MHz Applications 3 Description This Technical report provides the actual results of the LNA using the BGB741L7 from Infineon Technologies for 76-880MHz applications. This Low Noise Amplifier brings a gain of 17.2dB minimum between the frequency Range of 76-880MHz with a noise figure of 1.45dB (including SMA connectors and PCB losses of 0.1dB). Furthermore, this device provides an unconditional stability from 10MHz up to 10GHz. The circuit is matched in input and output and presents an input return loss of 8.9dB (for FM) and 14.4dB (for UHF). The LNA brings a minimum matching of 11.3dB at the output. At the frequency of 100MHz, using two tones spacing by 1MHz, the output third-order intercept point reaches 15.7dBm. Besides we obtain an input -1dB compression point of -5.7dBm. Technical Report, TR142 5 / 12 29 July 2009 Technical Report TR142 LNA using BGB741L7 for FM/VHF/UHF 76-880MHz Applications 4 Schematics Figure 4-1: Schematics of the BGB741L7 for the FM and UHF 88-880MHz Table 2 : Bill of Materials C1 100 pF 0402 various Input Matching/DC Block C2 10 nF 0402 various RF Bypass C3 10 nF 0402 various RF Bypass C4 100 pF 0402 various Output Matching/DC Block L1 150 nH 0402 Murata LQG15A Input Matching/DC Feed L2 100 nH 0402 Murata LQG15A Output Matching/DC Feed R1 8.2 Ω 0402 various Stabilization TSLP7-1 Infineon SiGe MMIC LNA BGB741L7 with integrated ESD protection Q1 Technical Report, TR142 6 / 12 29 July 2009 Technical Report TR142 LNA using BGB741L7 for FM/VHF/UHF 76-880MHz Applications 5 Measured Graphs Transducer Power Gain 25 88 MHz 17.76 dB 20 98 MHz 17.77 dB 470 MHz 17.53 dB 108 MHz 17.76 dB 15 880 MHz 17.16 dB 675 MHz 17.33 dB 10 5 0 10 110 210 310 410 510 610 Frequency (MHz) 710 810 910 1000 Figure 5-1: Power Gain of the BGB741L7 for the FM and UHF 88-880MHz Input Matching 0 -5 88 MHz -8.907 dB -10 880 MHz -14.43 dB 98 MHz -9.713 dB 470 MHz -16.49 dB -15 675 MHz -15.37 dB 108 MHz -10.33 dB -20 -25 10 110 210 310 410 510 610 Frequency (MHz) 710 810 910 1000 Figure 5-2: Input Matching of the BGB741L7 for the FM and UHF 88-880MHz Technical Report, TR142 7 / 12 29 July 2009 Technical Report TR142 LNA using BGB741L7 for FM/VHF/UHF 76-880MHz Applications Output Matching 0 88 MHz -11.84 dB -5 -10 -15 880 MHz -11.29 dB 470 MHz -12.14 dB 98 MHz -12.05 dB 675 MHz -11.63 dB 108 MHz -12.22 dB -20 -25 10 110 210 310 410 510 610 Frequency (MHz) 710 810 910 1000 Figure 5-3: Output Matching of the BGB741L7 for the FM and UHF 88-880MHz Reverse Isolation 50 45 40 35 88 MHz 22.4 30 98 MHz 22.26 25 20 880 MHz 22.33 675 MHz 22.05 470 MHz 21.9 108 MHz 22.18 15 10 10 110 210 310 410 510 610 Frequency (MHz) 710 810 910 1000 Figure 5-4: Reverse Isolation of the BGB741L7 for the FM and UHF 88-880MHz Technical Report, TR142 8 / 12 29 July 2009 Technical Report TR142 LNA using BGB741L7 for FM/VHF/UHF 76-880MHz Applications Stability 5 4 3 78.681 MHz 1.014 2 1 0 10 1010 2010 3010 4010 5010 6010 Frequency (MHz) 7010 8010 9010 10000 Figure 5-5: Stability of the BGB741L7 for the FM and UHF 88-880MHz Figure 5-6: OIP3 of the BGB741L7 for FM 88-108MHz Technical Report, TR142 9 / 12 29 July 2009 Technical Report TR142 LNA using BGB741L7 for FM/VHF/UHF 76-880MHz Applications Figure 5-7: OIP3 of the BGB741L7 for UHF 470-880MHz Technical Report, TR142 10 / 12 29 July 2009 Technical Report TR142 LNA using BGB741L7 for FM/VHF/UHF 76-880MHz Applications 6 Evaluation Board and layout Information Figure 6-1: PCB picture of the BGB741L7 for FM and UHF 88-880MHz Application Figure 6-2: Layout Information Technical Report, TR142 11 / 12 29 July 2009 w w w . i n f i n e o n . c o m Published by Infineon Technologies AG TR142