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RxBlockFig1-1Rxblock

AlthoughRxpartcircuitdesignbaseon50ohm,butalsoneedmatchingcircuit,insteadofconnectdirectly.Becauseoftheimpedanceisnot50ohmforallfrequencyinonecellcircuit.Therefore,onecellcircuitconnectanothercellthecascadedresponsemightbemuchdifferentthanweanticipate,especiallyattheoutofbandarea.Respectively,Fig1-2~Fig1-4isBPF1,LNA,BPF2Schematic,andFig1-5isBPF1+LNA+BPF2unitedschematic.SchematicofBPF1Fig1-2BPF1schematicSchematicofLNAFig1-3LNAschematicSchematicofBPF2Fig1-4BPF2schematicBPF1+LNA+BPF2Fig1-5BPF1+LNA+BPF2schematicUnite47nHand33nHinductorsto82nHModify15pFto12pF,inordertoimproveIP3MatchingComparetheunitedcircuitwitheachcellcircuit,weonlychangeonecapacitanceC419:15pF—12pF,inordertoimproveHchannelIP3.Thereis5samplesunitecircuittestdataasfollow:S-parameterTestdataLchannel(136MHz)Fig1-6BPF1+LNA+BPF2LchannelTestS-parameterTestdataLchannel(136MHz)Fig1-7BPF1+LNA+BPF2LchannelTestAtleastGainis13dBforsensitivityS-parameterTestdataLchannel(136MHz)Fig1-8BPF1+LNA+BPF2LchannelIsolationTestAtleastIsolationS-parameterTestdataLchannelS-parameterTestdataLchannel(136MHz)S-parameterTestdataMchannel(155MHz)Fig1-9BPF1+LNA+BPF2MchannelTestS-parameterTestdataMchannel(155MHz)AtleastGainis13dBforsensitivityS-parameterTestdataMchannel(155MHz)Fig1-10BPF1+LNA+BPF2MchannelIsolationTestAtleastIsolationS-parameterTestdataMchannel(155MHz)S-parameterTestdataMchannel(155MHz)S-parameterTestdataHchannel(174MHz)Fig1-11BPF1+LNA+BPF2HchannelTestS-parameterTestdataHchannel(174MHz)AtleastGainis13dBforsensitivityS-parameterTestdataMchannel(155MHz)Fig1-12BPF1+LNA+BPF2HchannelIsolationTestAtleastIsolationS-parameterTestdataHchannel(174MHz)S-parameterTestdataHchannel(174MHz)HChanneldB(S(2,2))isnotwell,duetotheresonanceL606//C615.RxsystemrejectionRejection/dBLoisolationIFAB21AB22AB11AB12AB13AB14AB15FrequencyMHzL180.8544.85112.85158.425225.7406.55587.4768.25949.1M199.8544.85122.35177.425244.7444.55644.4844.25954.4H218.8544.85131.85196.425263.7482.55701.4920.251049.4LPFL00002030303030M00003330303030H00004230303030BPF1L10251052310201010M10251052010201010H10251051610201010BPF2L20351574520302030M20351573720302030H20351573020302030TotalL506025128860806070M506025128860806070H506025128860806070Atleast50552088550755065Table1-1RxsystemrejectionIncludingLNAisolation(20dB)AccordingtoTable1-1Rxspuriousfrequencyrejection,weneedtoprovidemoreattentionontherejectionofAB21,AB22,AB11,becausetheirfilterprotectionplayabigroleinrejectingthisspuriousfrequenciesfromgoingintothemixer.MeasuredBPF1+LNA+BPF2rejectionastable1-2:Rejection/dBLoIsolationIFAB21AB22AB11AB12AB13AB14AB15FrequencyMHzL180.8544.85112.85158.425225.7406.55587.4768.25949.1M199.8544.85122.35177.425244.7444.55644.4844.25954.4H218.8544.85131.85196.425263.7482.55701.4920.251049.4TargetedRejectionforSpuriousFrequenciesL508025106860606060M508025105260606060H508025104360606060BPF1+LNA+BPF2TestdataFor5smaples(min)L70953421.571.996939090M6610332.921.35595979291H6510732.815.64489899091AtLeastRequestinRXSystemCircuitsL50552086520452035M50552085220452035H50552084320452035Table1-2ABPF1+LNA+BPF2TestrejectionBPF1+LNA+BPF2RejectionRejection/dBGainLoIsolationIFAB21AB22AB11AB12AB13AB14AB15FrequencyMHzL136180.8544.85112.85158.425225.7406.55587.4768.25949.1M155199.8544.85122.35177.425244.7444.55644.4844.25954.4H174218.8544.85131.85196.425263.7482.55701.4920.251049.4BPF1+LNA+BPF2Sample1#L13.3172.4995352673.3103939091M14.5466.9112332455.11009710192H1567.110732.6318.7346.8989899598BPF1+LNA+BPF2Sample2#L13.4371.3910334.223.376.3107939193M14.5667.210334.422.6955.6989996100H14.8968.2107.533.8916.4844.39929895100BPF1+LNA+BPF2Sample3#L13.5570.831023524.472.597989891M14.8567.110232.923.956.01011049293H15.566.8115.832.818.2445.01891069290BPF1+LNA+BPF2Sample4#L13.3570.7610038.121.574.1969310890M14.6866.110536.1821.3555.4495999491H15.166.211035.5815.6644.61901009092BPF1+LNA+BPF2Sample5#L13.6871.4810338.422.171.9112969688M14.8166.310636.122.256.1969710394H15.365.4108.235.5716.1845.0790959593TargetedRejectionforSpuriousFrequenciesL13508025106860606060M13508025105260606060H13508025104360606060Table1-2BBPF1+LNA+BPF2TestrejectionAsshownfromTable1-2BPF1+LNA+BPF2Testrejection,theredundancyofAB22(Hchannel),AB11(L,M,Hchannel)isthemostlittle.Therefore,wemaytakecareoftheirrejectionwhenoptimizecircuitparameter.IP3TestBPF1+LNA+BPF2IP3EstimationdBmOP3GainIP3L12.4813.03-0.54M13.0114.24-1.23H12.5515.19-2.64BaseoneachcellcircuitIP3,estimationBPF1+LNA+BPF2unitecircuitIP3asshownlefttable.Thetestdataasfollow:IP3TestTable1-3BPF1+LNA+BPF2IP3TestAsshownfromTable1-3,IP3testdataofBPF1+LNA+BPF2is1dB(atleast)betterthanestimation.TheworstIP3isHchannel

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