Xov xwm

Cov khoom siv sib txuas lus yog ib hom khoom siv ua cov teeb liab tseem ceeb. Lawv lub luag haujlwm tseem ceeb yog los kuaj cov teeb liab RF ntawm qib kev sib txuas ua ntej, nrog kev sib cais siab ntawm cov chaw nres nkoj teeb liab thiab cov chaw nres nkoj kuaj - uas txhawb kev tshuaj xyuas, kev ntsuas thiab kev ua tiav rau ntau daim ntawv thov. Vim tias lawv yog cov khoom siv tsis siv zog, lawv kuj ua haujlwm hauv qhov kev taw qhia rov qab, nrog cov teeb liab txhaj rau hauv txoj kev tseem ceeb raws li cov khoom siv kev taw qhia thiab qib kev sib txuas. Muaj ob peb qhov kev hloov pauv hauv kev teeb tsa ntawm cov khoom siv sib txuas lus, raws li peb yuav pom hauv qab no.

Cov Lus Txhais

Qhov zoo tshaj plaws, lub coupler yuav tsum tsis muaj kev poob, sib phim thiab sib pauv. Cov yam ntxwv tseem ceeb ntawm peb- thiab plaub-qhov chaw nres nkoj network yog kev sib cais, kev sib txuas thiab kev coj ua, cov nqi uas siv los piav qhia cov couplers. Lub coupler zoo tagnrho muaj kev coj ua tsis kawg thiab kev sib cais, nrog rau qhov sib txuas xaiv rau daim ntawv thov uas xav tau.

Daim duab qhia txog kev ua haujlwm hauv daim duab 1 qhia txog kev ua haujlwm ntawm lub coupler directional, ua raws li kev piav qhia ntawm cov kev ua tau zoo. Daim duab saum toj kawg nkaus yog 4-port coupler, uas suav nrog ob qho tib si coupled (forward) thiab isolated (reverse, lossis reflected). Daim duab hauv qab yog 3-port structure, uas tshem tawm qhov isolated port. Qhov no yog siv rau hauv cov ntawv thov uas tsuas yog xav tau ib qho forward coupled output. Lub 3-port coupler tuaj yeem txuas rau hauv qhov rov qab, qhov twg qhov port uas yav dhau los coupled dhau los ua qhov isolated port:

Daim Duab 1: Qhov Yooj Yimkev sib txuas luskev teeb tsa

Cov yam ntxwv ntawm kev ua tau zoo:

Coupling Factor: Qhov no qhia txog feem pua ​​ntawm lub zog nkag (ntawm P1) uas xa mus rau qhov chaw nres nkoj txuas, P3

Kev Taw Qhia: Qhov no yog qhov ntsuas ntawm lub peev xwm ntawm lub coupler los cais cov nthwv dej uas nthuav mus rau pem hauv ntej thiab rov qab, raws li pom ntawm cov chaw txuas (P3) thiab cais (P4)

Kev rho tawm: Qhia txog lub zog xa mus rau qhov tsis sib txuas (P4)

Kev Poob Ntxig: Qhov no suav nrog lub zog nkag (P1) xa mus rau qhov chaw nres nkoj xa mus (P2), uas raug txo los ntawm lub zog xa mus rau cov chaw nres nkoj txuas thiab cais tawm.

Cov nqi ntawm cov yam ntxwv no hauv dB yog:

Kev sib txuas = C = 10 log (P1/P3)

Kev Ncaj Ncees = D = 10 log (P3/P4)

Kev rho tawm = Kuv = 10 log (P1/P4)

Kev Poob Ntxig = L = 10 log (P1/P2)

Hom Couplers

Cov Couplers Directional:

Hom coupler no muaj peb lub qhov (ports) uas siv tau, raws li pom hauv daim duab 2, qhov twg lub qhov (port) thib plaub raug kaw sab hauv kom muab qhov siab tshaj plaws. Lub luag haujlwm tseem ceeb ntawm lub coupler directional yog los kuaj lub teeb liab cais (rov qab). Ib qho kev siv feem ntau yog ntsuas lub zog rov qab (lossis tsis ncaj qha, VSWR). Txawm hais tias nws tuaj yeem txuas nrog rov qab, hom coupler no tsis yog reciprocal. Vim tias ib qho ntawm cov qhov (ports) txuas nrog raug kaw sab hauv, tsuas yog ib lub teeb liab txuas nrog xwb. Hauv kev taw qhia mus tom ntej (raws li pom), lub qhov (port) txuas nrog yuav kuaj lub nthwv dej rov qab, tab sis yog tias txuas nrog rau kev taw qhia rov qab (RF Input ntawm sab xis), lub qhov (port) txuas nrog yuav yog ib qho piv txwv ntawm nthwv dej mus tom ntej, txo los ntawm qhov sib txuas. Nrog rau qhov kev sib txuas no, lub cuab yeej yuav siv tau ua lub sampler rau kev ntsuas lub teeb liab, lossis xa ib feem ntawm lub teeb liab tso zis rau cov khoom siv rov qab.

Daim Duab 2: 50-Ohm Directional Coupler

Cov txiaj ntsig:

1. Kev ua tau zoo tuaj yeem ua kom zoo dua rau txoj kev mus tom ntej

2, Kev coj ncaj qha thiab kev rho tawm siab

3, Qhov kev coj ua ntawm lub coupler raug cuam tshuam los ntawm qhov sib phim impedance uas muab los ntawm qhov xaus ntawm qhov chaw nres nkoj cais. Kev kho kom tiav qhov xaus sab hauv ua kom muaj kev ua tau zoo

Qhov Tsis Zoo:

1, Kev sib txuas tsuas yog muaj nyob rau ntawm txoj kev mus tom ntej xwb

2. Tsis muaj kab txuas

3, Qhov ntsuas fais fab ntawm qhov chaw txuas nrog tsawg dua qhov chaw nres nkoj nkag vim tias lub zog siv rau qhov chaw txuas nrog yuav luag tag nrho ploj mus rau hauv qhov xaus sab hauv.

Si Chuan Keenlion Microwave muaj ntau yam Directional Coupler hauv narrowband thiab broadband configurations, npog frequencies txij li 0.5 txog 50 GHz. Lawv tau tsim los tswj hwm los ntawm 10 txog 30 watts input fais fab hauv 50-ohm transmission system. Microstrip lossis stripline designs siv, thiab optimized rau kev ua tau zoo tshaj plaws.

Cov chav tsev tuaj nrog tus qauv SMA lossis N poj niam connectors, lossis 2.92mm, 2.40mm, thiab 1.85mm connectors rau cov khoom siv zaus siab.

Peb kuj tseem tuaj yeem kho qhov loj meKev Sib Txuas Lusraws li koj xav tau. Koj tuaj yeem nkag mus rau nplooj ntawv kho kom haum rau koj kom muab cov lus qhia uas koj xav tau.

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