Yuav sim ntsuas S-Int ua li cas rau RF amplifier?

 

Kuaj cov S-Inters ntawm ib tus rf amplifier yog qhov tseem ceeb ntawm cov cim txheej txheem, raws li nws tuaj yeem muaj cov kev txiav txim siab ntawm cov khoom lag luam uas xav tau {}}

 

Kuv {. tus tub ntxhais S-tsis tau sim rau RF Amplifiers

Rau ob-chaw nres nkoj RF amplifier, S-tsis xav tsom ntsoov tsom rau suav nrog:

S₁₁ (tswv yim xav txog kev coefficient): Qhia txog kev sib txuam ntawm kev sib txuam ntawm lub suab nrov thiab qhov chaw impedance (feem ntau 50ω);

S₂₁ (Forward Kis coefficient): Represents the gain of the amplifier, i.e., the ratio of output power to input power;

S₁₂ (rov qab hloov cov nqi cetereffici): Muaj kev cuam tshuam cov kev rho tawm, uas yog qhov ntau ntawm cov teeb liab kev lag luam los ntawm cov zis xaus rau cov lus nkag mus;

S₂₂ (Tawm Refle Refleate Coudhess): Qhia txog kev sib txuam cov qib ntawm lub amplifier thiab lub nra impedance (feem ntau 50ω) {1}.

 

II {. Cov Khoom Siv Uas Yuav Tsum Tau Thiab Kuaj Cov Khoom Siv

Txhawm rau kom raug ntsuas S-tsis, cov khoom siv hauv qab no xav tau:

Vector Network Analyer (VNA): Cov twj tseem ceeb, siv los tsim cov cim tsis sib xws, ntsuas cov cim qhia dav dav thiab theem ntawm kev sib tham / kev sib txuas lus, thiab suav cov s-leg {2}

Ntsuas Cov Khoom Siv Hluav Taws Xob: Feem ntau ib solt (luv luv, qhib, thauj khoom, thru, siv rau calibrate qhov tseeb tshwm sim los ntawm cov vna, txuas cov khoom siv, thiab ntsuas cov khoom siv .

RF CABLE thiab cov txuas: Tsis muaj kev poob qis, zoo coaxial clesles nws yuav tsum phim lub system (tus qauv yog 50ω) los txo cov cim poob thiab rov qab.

Bias Tee (yeem): Cheebtsam passive siv los sib xyaw ua ke DC kev tsis ncaj ncees (rau kev siv lub cim qhia tau tias DC tsis nkag mus rau RF chaw nres nkoj ntawm VNA {{0.

Hostenator (yeem): Yog tias tso zis lub zog ntawm lub amplifier yog siab, ib qho chaw nres nkoj ruaj khov tuaj yeem ntsia tau ntawm VNA tus txais nyiaj los ntawm overload .

Thauj khoom (yeem): 50 caum lub nra, siv rau kev ntsuas kev ruaj khov lossis ua kom pom tseeb cov zis txuam nrog {}}

 

III {.} Cov txheej txheem ntsuas-ntawm-kauj ruam

1: Npaj lub suab nrov thiab ntsuas ib puag ncig

Piav kom meej rau cov lus qhia tseeb: nws cov kev ua haujlwm ntau dua, kev siv hluav taws xob (kom tsis txhob muaj ntau txoj kev sim siab) {}}}

Lub hwj chim lub suab hluav taws xob nce ntxiv: siv cov ntaub ntawv muaj zog DC ruaj khov los muab cov kev xav tau hluav taws xob yuav tsum tau muab cov kev ntsuas hluav taws xob yuav tsum tau muaj kev cuam tshuam / tam sim no.

2: Kho kom ntsuas cov neeg siv vector networkeryer (VNA)

Kev ntsuas hluav taws xob yog qhov tseem ceeb rau kev tshem tawm cov kev ua yuam kev hauv qhov ntsuas sim hauv cov kab ke .

Txuas cov khoom siv hluav taws xob ntsuas hluav taws xob rau VNA: Siv cov qauv qis dua kev siv hluav taws xob (luv, xa tawm) rau VNA cov chaw xeem (chaw nres nkoj 1 thiab chaw nres nkoj 2) {3} {3}

Teem lub VNA Calibration Program: Xaiv cov hom calibration (e {{{} g}}}

Txheeb xyuas qhov kev ntsuas hluav taws xob muaj txiaj ntsig: tshuaj xyuas seb qhov kev ntsuas VNA puas yog qhov ze rau qhov tseem ceeb rau qhov tseem ceeb {}}

3: Txuas lub RF amplifier rau cov txheej txheem ntsuas

Tom qab calibration, txuas lub amplifier rau lub vna los ntawm kev ntsuas ntsuas ntsuas ntsuas:

Input kev txuas: Txuas musna Chaw nres nkoj 1 txog rau lub tswv yim xaus ntawm lub tswv yim dhau los ntawm lub teeb liab xaus thiab xa cov teeb liab rf ntawm VNA .

Cov zis kev twb kev txuas tau: Txuas cov zis xaus ntawm lub suab nrov rau kev xa tawm ntawm lub zog tshaj plaws ntawm lub zog tshaj plaws ntawm lub zog ntawm lub VNA

Kev ruaj ntseg cov kev sib txuas: ua kom txhua tus sib txuas tau nruj dua (cov ciaj ntseem tau kom nruj dua nrog cov ciaj ntswj lossis kev sib tiv thaiv tsis zoo lossis cuam tshuam.

4: Tsim lub VNA rau kev ntsuas

Teem lub VNA los tsom cov ntsiab lus tseem ceeb ntawm lub amplifier:

Zaus dhau: txhais tau qhov pib thiab nres ntau zaus los npog cov hlua khi ntawm lub suab nrov tshaj plaws {}}

Lower Theem: Teem cov zis lub zog ntawm lub VNA ntawm Lration ua haujlwm ntau ntawm cov ntaub ntawv cov ntaub ntawv rau nws linear tawm hluav taws xob ntau {}}

Intermediate zaus bandwidth (yog tias BW): Xaiv cov theem nrab zaus bandwidth kom sib piv rau kev ntsuas nrawm dua tab sis qeeb qeeb ntsuas cov suab nrawm; ib tug dav bandwidth ceev mus kuaj tab sis yuav qhia lub suab.

S-tsis tau ntsuas kom ntsuas: Xaiv cov tsis txaus siab (s₁₁, s₂₁, s₁₂, s₂₂, s₂₂).

5: Ua qhov ntsuas ntsuas thiab kaw cov ntaub ntawv

Pib lub scan: pib qhov zaus scan ntawm vna .

Pom cov txiaj ntsig: VNA yuav tso tawm cov S-Incameters nyob rau hauv daim ntawv ntawm qhov amplitude (DB) thiab theem (degrees) sib txawv nrog zaus.

Txuag thiab txheeb xyuas cov ntaub ntawv: export cov ntaub ntawv (e {{{} g}, hauv csv lossis kev soj ntsuam kom muaj kev ruaj khov thiab tau txais cov kev ntsuas kom ruaj khov) {}

 

Iv {. kev txiav txim siab tseem ceeb

Lub zog tuav lub peev xwm: Tsis txhob tshaj qhov siab tshaj plaws / tso zis lub zog ntsuas ntawm lub suab nrov, vim qhov no yuav ua rau lub cuab yeej lossis lub VNA .

Ruaj khov: Rau kev nce qib siab, xyuas kom meej tias kev sim teeb (suav nrog cov lus qhia, uas tuaj yeem ua rau oscillation thiab invidetate ntsuas ntsuas.

Calibration zaus them: Calibrate lub VNA hla ntau zaus ntau zaus ntawm kev txaus siab, tsis yog ib feem ntawm nws, kom ntseeg tau qhov tseeb ntawm txhua zaus cov ntsiab lus .

 

Los ntawm kev ua raws li cov theem saum toj no, S-tsis yog cov neeg sib txuas lus zoo xws li cov kev sib txuas lus tseem ceeb, muaj lub suab sib txuas lus tseem ceeb, hluav taws xob.