noisedistortioninmicrowavesystems(完整版)
【正文】 tAvailable Noise Power: Maximum Power can be delivered from Noise Source to load k T BRVRVP nnn ??? 41)2(222220nkTBPS nn ???)(?Twoside Power Spectral Density of thermal noise B +B f理想帶通濾波器 oeNTkB?白噪聲源用一個(gè)等效噪聲溫度來表征， Te表征元件或系統(tǒng)，B是元件或系統(tǒng)的帶寬 任意 2 Noise Temperature amp。 Intermodulation Distortion（交調(diào)失真） ?Nonlinear（引起非線性響應(yīng)的原因） : ?At very Low Power Level due to Noise Effects. ?At very High Power Level due to device nonlinearities Nonlinear Device iv ov????? 2210 iio vavaavLinear output DC output )0(0 ova ?01??iviodvdva0222??iviodvvda Squared（ 平方 ） output ?tVatVatVaav o ??? 330322020200 c o sc o sc o s ????tVv i 00 ?c o s????? tVatVa 030341020221 32 ?? c o sc o s202210 Vaa ?? DC output tVaVa 03034301 ?c os)( ?? Linear output ?Gain Compression（增益壓縮） Nonlinear Device iv ov????? 2210 iio vavaav1dB 1dB Compression Point Input P1dB Output P1dB Pin(dBm) P out(dBm) 1 dB Compression Point: Voltage Gain: 20343103034301000VaaV VaVavvGiv ?????)()(??3 ?a?Intermodulation Distortion 1? 2?212 ?? ? 122 ?? ?13? 23?212 ?? ? 122 ?? ?12? 22?21 ???12 ?? ?2021211 VaP ??2336023329230343212121 )()()(PPVaVaP ??? ??????????? 22120221010 )c o s( c o s)c o s( c o s ttVattVaav o ????)c o s( c o s ttVv i 210 ?? ?? ????? 2210 iio vavaav313323aPa??IP3: Third
教學(xué)課件相關(guān)推薦
鄂ICP備17016276號(hào)-1