AN369: Si4010 Antenna Interface and Matching Network ... - wless.ru

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AN369Figure 20. Top Layout of the SL Testcard with MSOP Packaged Si4010The measured spectrum by a 50 spectrum analyzer up to 3.6 GHz is shown in Figure 21. The realized matchinghas ETSI compliance in this conductive measurement. Assuming 0 dB gain antenna the compliance reserved inradiated measurements as well.The fundamental power is ~+9.7 dBm. Assuming 1.0 dB loss for the balun and 0.1 dB loss for the filter, the powerdelivered to the differential port of the balun is ~+10.8 dBm. That is, the power goes into a properly designeddifferential antenna input without external matching elements.20 Rev. 0.1
AN369Figure 21. Measured Spectrum Up to 3.6 GHz4.1.4. 868 MHz MSOP Matching BalunThe schematic of the 868 MHz balun with element values for the MSOP-packaged Si4010 is shown in Figure 22.This matching is ETSI-compliant. The Si4010 tunes the internal cap. bank to state 9 automatically with thismatching.The top layer of the Silicon Labs testcard is shown in Figure 23. It is recommended to copy and use theRF layout around the chip as it is. The gerbers of the board can be found on the Silicon Labs website.Rev. 0.1 21
Page 1 and 2: AN369Si4010 ANTENNA I NTERFACE AND
Page 3 and 4: AN369A second important operation m
Page 5 and 6: AN369Figure 4. 4010-DAPB434 Schemat
Page 7 and 8: AN369Figure 5. Si4010-DAPB434 Key F
Page 9 and 10: AN369Figure 8. Antenna Simulation (
Page 11 and 12: AN369enough to accurately estimate
Page 13 and 14: AN369Simulated impedance:The simula
Page 15 and 16: AN3694.1. Matching Baluns for Si401
Page 17 and 18: AN3694.1.2. 868MHz SOIC Matching Ba
Page 19: AN3694.1.3. 434 MHz MSOP Matching B
Page 23 and 24: AN3694.2. High Q Discrete Matching
Page 25 and 26: AN3691. Calculate the values e.g. f
Page 27 and 28: AN3694.00180.0PHASE3.0090.002.000.0

AN369: Si4010 Antenna Interface and Matching Network ... - wless.ru

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