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

More documents

Recommendations

Info

AN369Table 4. 128 Tuning Cap Used Impedance ParametersFreq[MHz]Attn max_drv 1434 0.93 ChipMaximum Output Voltage(Vpp/2)*095Tail Current(2*RF current magnitude) [mA]Parallel RC ModelComponent ValuesParallel TX Model AdmittanceTX Quality FactorParallel Load Resistance forMax Voltage SwingOptimal Load ImpedanceParallel ModelCapword DrvLvl Umax [V] Imax[mA]Rcp [Ohm] Ccp [F] Gcp [S] Bcp [S] QTX Rlpm [Ohm] Rlp[Ohm]Xlp[Ohm]0 0 4 1.090 2.89E+04 2.7E–12 3.46E–05 7.28E–03 211 3201 3201 –1370 43 4 2.800 2.86E+04 2.7E–12 3.50E–05 7.28E–03 208 1168 1168 –1370 77 4 10.000 2.79E+04 2.7E–12 3.59E–05 7.28E–03 203 318 318 –13732 0 4 1.090 1.18E+04 3.3E–12 8.44E–05 8.91E–03 105 3809 3809 –11232 43 4 2.800 1.18E+04 3.3E–12 8.49E–05 8.91E–03 105 1240 1240 –11232 77 4 10.000 1.16E+04 3.3E–12 8.58E–05 8.91E–03 104 323 323 –11264 0 4 1.090 7.52E+03 3.9E–12 1.33E–04 1.06E–02 80 4675 4675 –9564 43 4 2.800 7.49E+03 3.9E–12 1.33E–04 1.06E–02 79 1320 1320 –9564 77 4 10.000 7.44E+03 3.9E–12 1.34E–04 1.06E–02 79 328 328 –9596 0 4 1.090 5.24E+03 4.5E–12 1.91E–04 1.23E–02 64 6398 5245 –8196 43 4 2.800 5.23E+03 4.5E–12 1.91E–04 1.23E–02 64 1428 1428 –8196 77 4 10.000 5.21E+03 4.5E–12 1.92E–04 1.23E-02 64 334 334 –81128 0 4 1.090 3.82E+03 5.1E–12 2.62E–04 1.40E–02 54 11731 3821 –71128 43 4 2.800 3.81E+03 5.1E–12 2.62E–04 1.40E–02 54 1590 1590 –71128 77 4 10.000 3.80E+03 5.1E–12 2.63E–04 1.40E–02 53 342 342 –71160 0 4 1.090 3.04E+03 5.8E–12 3.28E–04 1.58E–02 48 54119 3044 –63Notes:1. The second-to-last row describes the case of cap. bank state 128 with boosted maximum power setting which is the targetedoperation setting with this 434 MHz antenna.2. The optimal load impedance parallel model columns show the calculated element values of the parallel equivalent of theoptimum differential termination impedance for the Si4010 output pins.12 Rev. 0.1
AN369Simulated impedance:The simulated antenna impedance with 4.90 pF at the input is shown in Figure 11. The resonance is near 434 MHz(the slight detuning will be compensated by the automatic tuning).Also the real part of the antenna impedance together with the 5.1 pF cap at the input is shown in Figure 12. Theresidual impedance at resonance is ~425 .Note: Accurate tuning of the real impedance part is difficult due to the strong tapping ratio.Figure 11. S11 Real/Img Resonance at 434 MHz, Cload=5.2 pFRev. 0.1 13
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: AN369enough to accurately estimate
Page 15 and 16: AN3694.1. Matching Baluns for Si401
Page 17 and 18: AN3694.1.2. 868MHz SOIC Matching Ba
Page 19 and 20: AN3694.1.3. 434 MHz MSOP Matching B
Page 21 and 22: AN369Figure 21. Measured Spectrum U
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

You also want an ePaper? Increase the reach of your titles

Delete template?

Save as template?