Technical Report, 2009-Feb-11 Technical Report ___________________________________________________________ High OIP3 LNA using BFP450 for 434MHz ISM band Application Technical Report TR119 Device: BFP450 Application: High-OIP3 LNA for 434MHz ISM Band Applications Revision: Rev. 1.0 Date: 2009-Feb-11 RF and Protection Devices Measurement Report 1 / 10 2009-02-11 Technical Report ___________________________________________________________ High OIP3 LNA using BFP450 for 434MHz ISM band Application Measurement Report 2 / 10 2009-02-11 Technical Report ___________________________________________________________ High OIP3 LNA using BFP450 for 434MHz ISM band Application 1. Overview Infineon Device: BFP450 NPN Silicon RF Bipolar Transistor Application: 434MHz Industrial, Scientific and Medical band Application PCB Marking: BFP740 Application Board (Using Emitter Degeneration) 2. Summary of Measurement Results Table 2-1: Summary of Measurement Results Parameter Symbol Value Unit Frequency Range Freq 434 MHz DC Voltage Vcc 2.2 V DC Current Icc 47.0 mA Gain G 23.8 dB Noise Figure NF 3.2 dB Input Return Loss RLin 10.3 dB Output Return Loss RLout 14.0 dB Reverse Isolation IRev 28.8 dB Input P1dB IP1dB -9.3 dBm Output P1dB OP1dB 13.5 dBm Input IP3 IIP3 6.8 dBm Output IP3 OIP3 30,6 dBm Stability k >1 -- Measurement Report 3 / 10 Note/Test Condition Power@port1:-30dbm Including SMA connectors and PCB losses of 0.1dB Power@port1:-30dbm Power@Input:-26dB ∆f 1=MHz Stability measured from 100MHz to 10GHz 2009-02-11 Technical Report ___________________________________________________________ High OIP3 LNA using BFP450 for 434MHz ISM band Application 3. Description: This report presents the measurement results of the Low Noise Amplifier using the transistor BFP450 from Infineon Technologies for the 434MHz ISM band application. The LNA brings a gain of 23.8dB on the frequency band at 434MHz with a noise figure of 3.2dB (including the SMA connector and PCB losses). Furthermore, this Device provides an unconditionally stability from 100MHz to 10GHz. Measurement Report 4 / 10 2009-02-11 Technical Report ___________________________________________________________ High OIP3 LNA using BFP450 for 434MHz ISM band Application 4. Schematics: Figure 4-1: Schematics of the Application Circuit Table 4-1: Bill of Materials Symbol Value Unit Size Manufacturer Comment C1 20 pF 0402 various Input DC Block C2 18 pF 0402 various Low Frequency Ground at base Improve IIP3 C3 100 nF 0603 various RF Bypass/RF Block C4 22 pF 0402 various Improve IIP3 C5 8.2 pF 0402 various Output Matching, Output DC Block Measurement Report 5 / 10 2009-02-11 Technical Report ___________________________________________________________ High OIP3 LNA using BFP450 for 434MHz ISM band Application L1 18 nH 0402 Murata LQW15A DC Feed, Input Matching L2 9.1 nH 0402 Murata LQW15A DC Feed, Output Matching R1 2.2 Ω 0402 various DC Bias, drop voltage for collector R2 2.4 kΩ 0402 various DC Bias for Base R3 2.2 Ω 0402 various Stability M1 0.2x0.9 mm² (microstrip line) width x length in mm M2 0.2x0.9 mm² (microstrip line) width x length in mm Q1 Measurement Report SOT343 Infineon Technologies 6 / 10 BFP450 NPN bipolar transistor 2009-02-11 Technical Report ___________________________________________________________ High OIP3 LNA using BFP450 for 434MHz ISM band Application 5. Measured Graphs Figure 5-1: Transducer Power gain of BFP450 Figure 5-2: Input matching of BFP450 Measurement Report 7 / 10 2009-02-11 Technical Report ___________________________________________________________ High OIP3 LNA using BFP450 for 434MHz ISM band Application Figure 5-3: Output matching of BFP450 Figure 5-4: Reverse Isolation of BFP450 Measurement Report 8 / 10 2009-02-11 Technical Report ___________________________________________________________ High OIP3 LNA using BFP450 for 434MHz ISM band Application Figure 5-5: Stability of BFP450 Figure 5-6: Output IP3 Measurement of the BFP450 The result of the OIP3 Measurement is OIP3 = Pf 1 + Measurement Report ( Pf 2 − Pf 3 ) 2 = −2,47 + 9 / 10 66,2 = 30,6dBm 2 2009-02-11 Technical Report ___________________________________________________________ High OIP3 LNA using BFP450 for 434MHz ISM band Application 6. Evaluation Board and Layout Information Figure 6-1: PCB Picture Figure 6-2: Layout Information www.Infineon.com/silicondiscretes Measurement Report 10 / 10 Published by Infineon Technologies AG 2009-02-11