BF P720 LNA usi ng BF P72 0 f or W LA N 5-6 G Hz Applic atio n Technic al Rep ort T R 154 Revision: V1.0 Date: 11 November 2009 RF and Protecti on Devi c es Edition 11 November 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 TR154 LNA using BFP720 for WLAN 5-6GHz Application TR154 Revision History: 11 November 2009 Previous Revision: No Revision Page Technical Report, TR154 3 / 13 11 November 2009 Technical Report TR154 LNA using BFP720 for WLAN 5-6GHz Application 1 Overview Device : BFP720 Application: LNA using BFP720 for WLAN 5-6GHz Application PCB Marking: BFP640-052402 Rev C 2 Summary of Measurement Results Table 1 Summary of Measurement Results Parameter Symbol Value Unit DC Voltage Vcc 3 V Icc mA 10.1 mA Frequency Range Freq Gain G 14.9 14.4 13.8 dB Noise Figure NF 1.2 1.15 dB Input Return Loss RLin 10.2 10.3 10.1 dB Output Return Loss RLout 12.1 12.5 10.1 dB Reverse Isolation IRev 25.7 24.7 24.0 dB Input P1dB IP1dB -8.1 dBm Output P1dB OP1dB 5.3 dBm Input IP3 IIP3 6.5 dBm Output IP3 OIP3 20.9 dBm Stability k >1.2 -- Technical Report, TR154 5 5.5 1.2 Note/Test Condition GHz 6 4 / 13 0.45dB loss of SMA connectors and PCB Substracted 0.25dB loss of SMA connectors and PCB included Power@Port2: -30dBm [email protected] Power@Input: -30dBm @5.5/5.501GHz ∆f =1MHz Stability measured from 100MHz to 10GHz 11 November 2009 Technical Report TR154 LNA using BFP720 for WLAN 5-6GHz Application 3 Description This Technical report provides the results of LNA using the BFP720 from Infineon Technologies for WLAN 5-6GHz applications. This Low Noise Amplifier brings a gain of about 14dB between the frequency Range of 5-6GHz with a noise figure of 1.15dB (SMA connectors and PCB losses of 0.25dB included). Furthermore, this device provides an unconditional stability from 100MHz up to 10GHz. The circuit is matched with an input return loss of better than 10.0dB. The LNA brings a matching of 10.1dB at the output. At the frequency of 5.5GHz, using two tones spacing by 1MHz, the output third-order intercept point reaches 20.9dBm. Besides we obtain an input -1dB compression point of -8.1dBm. Technical Report, TR154 5 / 13 11 November 2009 Technical Report TR154 LNA using BFP720 for WLAN 5-6GHz Application 4 Schematics Figure 4-1: Schematics of the BFP720 for 5-6GHz WLAN Application Table 2 : Bill of Materials Symbol Value Unit Size Supplier L1 3.4 nH 0402 Murata LQW15A C1 3 pF 0402 Various Input matching/DC block C2 33 nF 0402 Various HF to ground C3 1 pF 0402 Various Input matching C4 33 nF 0402 Various HF to ground C5 1 pF 0402 Various Output matching/DC block R1 27 Ω 0402 Various Biasing Voltage Setting R2 43 kΩ 0402 Various Base current setting R3 0 Ω 0402 Various Not used, jumper R4 51 Ω 0402 Various Output matching/stability R5 2.2 Ω 0402 Various Output matching/stability SOT343 Infineon SiGe MMIC LNA BFP720 Q1 Technical Report, TR154 6 / 13 Comment Input matching/DC feed to base 11 November 2009 Technical Report TR154 LNA using BFP720 for WLAN 5-6GHz Application 5 Measured Graphs Transducer Power Gain 30 5000 MHz 14.9 dB 20 6000 MHz 13.84 dB 10 0 5500 MHz 14.44 dB -10 -20 -30 -40 0 1000 2000 3000 4000 Frequency (MHz) 5000 6000 7000 Figure 5-1: Power Gain of the BFP720 for WLAN 5-6GHz Input Matching 0 -5 6000 MHz -10.14 dB 5000 MHz -10.2 dB -10 -15 5500 MHz -10.31 dB -20 -25 4000 4500 5000 5500 6000 Frequency (MHz) 6500 7000 Figure 5-2: Input Matching of the BFP720 for WLAN 5-6GHz Technical Report, TR154 7 / 13 11 November 2009 Technical Report TR154 LNA using BFP720 for WLAN 5-6GHz Application Output Matching 0 -5 6000 MHz -10.1 dB 5000 MHz -12.08 dB -10 -15 5500 MHz -12.46 dB -20 -25 4000 4500 5000 5500 6000 Frequency (MHz) 6500 7000 Figure 5-3: Output Matching of the BFP720 for WLAN 5-6GHz Reverse Isolation 50 45 40 5000 MHz 25.66 35 30 5500 MHz 24.69 6000 MHz 24.02 25 20 15 10 5 0 4000 4500 5000 5500 6000 Frequency (MHz) 6500 7000 Figure 5-4: Reverse Isolation of the BFP720 for WLAN 5-6GHz Technical Report, TR154 8 / 13 11 November 2009 Technical Report TR154 LNA using BFP720 for WLAN 5-6GHz Application Stability K Factor 5 4 3 10000 MHz 1.205 2 1 0 0 1000 2000 3000 4000 5000 6000 Frequency (MHz) 7000 8000 9000 10000 Figure 5-5: Stability K-Factor of the BFP720 for WLAN 5-6GHz Stability Mu factor 2 Mu2 factor Mu1 factor 1.5 1 10 MHz 1.002 0.5 0 10 2010 4010 6010 Frequency (MHz) 8010 10000 Figure 5-6: Stability Mu-Factor of the BFP720 for WLAN 5-6GHz Technical Report, TR154 9 / 13 11 November 2009 Technical Report TR154 LNA using BFP720 for WLAN 5-6GHz Application Figure 5-7: 3rd Order Intercept Point of the BFP720 for WLAN 5-6GHz Figure 5-8: Input Power at 1dB compression point of the BFP720 for WLAN 5-6GHz Technical Report, TR154 10 / 13 11 November 2009 Technical Report TR154 LNA using BFP720 for WLAN 5-6GHz Application Noise figure 2 dB 5500 1.182 5000 1.2 1.5 6000 1.147 1 0.5 0 5000 5250 5500 MHz 5750 6000 Figure 5-9: Noise Figure of the BFP720 for WLAN 5-6GHz Z Parameters Input output matching 2. 0 0. 4 6000 MHz r 0.715892 x 0.475536 0 3. 0 4. 5.0 2 -0. -1.0 -0.8 .0 -2 -3 .0 -0 .6 10.0 -4 .0 -5. 0 5000 MHz r 0.60393 x 0.0527962 .4 -0 10.0 5.0 4.0 5500 MHz r 0.708555 x 0.292511 3.0 2.0 1.0 0.8 6000 MHz r 0.826792 x 0.572492 0.6 0.4 5500 MHz r 0.590168 x 0.272277 0.2 0.2 0 1.0 0.8 6 0. S22 5000 MHz r 0.533696 x 0.089137 Swp Max 6000MHz -10.0 S11 Swp Min 5000MHz Figure 5-10: Input and Output Impedance of the BFP720 for WLAN 5-6GHz Technical Report, TR154 11 / 13 11 November 2009 Technical Report TR154 LNA using BFP720 for WLAN 5-6GHz Application 6 Evaluation Board and layout Information Figure 6-1: PCB picture of the BFP720 for WLAN 5-6GHz LNA Figure 6-2: Layout Information Technical Report, TR154 12 / 13 11 November 2009 w w w . i n f i n e o n . c o m Published by Infineon Technologies AG TR154