BGB741L7 LNA using BGB741L7 for UHF 300-1000MHz Application Technical Report TR140 Revision: V1.0 Date: RF and protection devices
Edition 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.
TR140 Revision History: Previous Revision: No Revision Page Technical Report, TR140 3 / 11
1 Overview Device : BGB741L7 Application: PCB Marking: BGB7-Family V1.0 2 Summary of Measurement Results Table 1 Summary of Measurement Results Parameter Symbol Value Unit Note/Test Condition Frequency Range Freq 650 MHz DC Voltage Vcc 3 V Icc ma 6.6 ma Gain G 18.5 db Power@Port1: -30dBm Noise Figure NF 1.45 db Input Return Loss RLin 17.7 db Output Return Loss RLout 16.5 db Including SMA connectors and PCB losses of 0.1dB Reverse Isolation IRev 21.2 db Power@Port2:-30dBm Input P1dB IP1dB -5 dbm Output P1dB OP1dB 12.5 dbm Input IP3 IIP3 0.8 dbm Output IP3 OIP3 19.3 dbm Power@Input: -30dBm @650/651MHz f =1MHz Stability k >1 -- Stability measured from 100MHz to 10GHz Technical Report, TR140 4 / 11
3 Description This Technical report provides the actual results of the LNA using the BGB741L7 from Infineon Technologies for the UHF 300-1000MHz applications. This Low Noise Amplifier brings a gain of 18dB minimum between the frequency Range of 300-1000 MHz with a noise figure of 1.45dB (including SMA connectors and PCB losses of 0.1dB). Furthermore, this device provides an unconditional stability from 100MHz up to 10GHz. The circuit is matched in input and output and presents an input return loss of 12.0dB and 10.5dB concerning the output. At the frequency of 650MHz, using two tones spaced of 1MHz, the output third-order intercept point reaches 19.3dBm. Besides we obtain an input -1dB compression point of -5dBm. Technical Report, TR140 5 / 11
4 Schematics Figure 4-1: Schematics of the BGB741L7 for the UHF 300-1000MHz Application 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 33 nh 0402 Murata LQG15A Input Matching/DC Feed L2 33 nh 0402 Murata LQG15A Output Matching/DC Feed Q1 TSLP7-1 Infineon SiGe MMIC LNA BGB741L7 with integrated ESD protection Technical Report, TR140 6 / 11
5 Measured Graphs 25 20 650 MHz 18.5 db Transducer Power Gain 2400 MHz 16.28 db 15 10 300 MHz 17.98 db 1000 MHz 18.33 db 5 0 100 600 1100 1600 2100 2600 3100 3600 4100 4600 5000 Frequency (MHz) Figure 5-1: Power Gain of the BGB741L7 for the UHF 300-1000MHz 0 Input Matching -5-10 300 MHz -12 db 1000 MHz -16.68 db -15 2400 MHz -10.32 db -20 650 MHz -18.46 db -25 100 600 1100 1600 2100 2600 3100 3600 4100 4600 5000 Frequency (MHz) Figure 5-2: Input Matching of the BGB741L7 for the UHF 300-1000MHz Technical Report, TR140 7 / 11
0 Output Matching -5-10 300 MHz -10.51 db 2400 MHz -8.886 db -15-20 650 MHz -17.45 db 1000 MHz -17.26 db -25 100 600 1100 1600 2100 2600 3100 3600 4100 4600 5000 Frequency (MHz) Figure 5-3: Output Matching of the BGB741L7 for the UHF 300-1000MHz 50 Reverse Isolation 45 40 35 30 25 650 MHz 21.34 2400 MHz 23.2 20 15 300 MHz 21.89 1000 MHz 21.57 10 100 600 1100 1600 2100 2600 3100 3600 4100 4600 5000 Frequency (MHz) Figure 5-4: Reverse Isolation of the BGB741L7 for the UHF 300-1000MHz Technical Report, TR140 8 / 11
5 Stability 4 3 668.97 MHz 1.041 2 1 0 100 1100 2100 3100 4100 5100 6100 7100 8100 9100 10000 Frequency (MHz) Figure 5-5: Stability of the BGB741L7 for the UHF 300-1000MHz Figure 5-6: OIP3 of the BGB741L7 for UHF 300-1000MHz Technical Report, TR140 9 / 11
6 Evaluation Board and layout Information Figure 6-1: PCB picture of the BGB741L7 for UGF 300-1000MHz Application Figure 6-2: Layout Information Technical Report, TR140 10 / 11
www.infineon.com Published by Infineon Technologies AG TR140