Alub tshuab faib hluav taws xobfaib ib lub teeb liab nkag mus ua ob (lossis ntau dua) lub teeb liab tso zis. Hauv qhov xwm txheej zoo tshaj plaws, lub tshuab faib hluav taws xob tuaj yeem suav tias tsis muaj kev poob, tab sis hauv kev xyaum yeej ib txwm muaj qee qhov kev poob hluav taws xob. Vim tias nws yog lub network sib pauv, lub tshuab sib txuas hluav taws xob kuj tseem siv tau ua lub tshuab sib txuas hluav taws xob, qhov twg ob (lossis ntau dua) qhov chaw nres nkoj siv los sib txuas cov teeb liab nkag mus rau hauv ib qho tso zis. Hauv kev xav, lub tshuab faib hluav taws xob thiab lub tshuab sib txuas hluav taws xob tuaj yeem yog tib qho khoom, tab sis hauv kev xyaum yuav muaj cov kev cai sib txawv rau cov tshuab sib txuas thiab cov tshuab faib, xws li kev tswj hluav taws xob, kev sib phim theem, kev sib phim qhov chaw nres nkoj thiab kev cais tawm.
Cov khoom faib fais fab thiab cov khoom sib txuas feem ntau hu ua cov khoom faib hluav taws xob. Txawm hais tias qhov no yog qhov tseeb hauv kev siv tshuab, cov kws ua vaj tse feem ntau khaws cia lo lus "splitter" txhais tau tias yog cov qauv tsis kim uas faib fais fab hla cov bandwidth dav heev, tab sis muaj kev poob ntau thiab kev tswj hwm fais fab tsawg.
Lo lus "divider" feem ntau yog siv thaum lub teeb liab nkag yuav raug faib sib npaug thoob plaws txhua qhov tso zis. Piv txwv li, yog tias muaj ob lub qhov tso zis, txhua lub yuav tau txais tsawg dua ib nrab ntawm lub teeb liab nkag, zoo dua -3 dB piv rau lub teeb liab nkag. Yog tias muaj plaub lub qhov tso zis, txhua lub qhov yuav tau txais kwv yees li ib feem plaub ntawm lub teeb liab, lossis -6 dB piv rau lub teeb liab nkag.
Muab cais nyob ib leeg
Thaum xaiv hom divider lossis combiner twg los siv, nws yog ib qho tseem ceeb uas yuav tsum xav txog kev cais tawm. Kev cais tawm siab txhais tau tias cov teeb liab tshwm sim (hauv combiner) tsis cuam tshuam nrog ib leeg, thiab txhua lub zog uas tsis xa mus rau qhov tso zis raug tshem tawm es tsis yog xa mus rau qhov chaw nres nkoj tso zis. Cov dividers sib txawv tswj qhov no hauv ntau txoj kev sib txawv. Piv txwv li, hauv Wilkinson divider, lub resistor muaj tus nqi 2Z0 thiab raug khi hla cov zis. Hauv quadrature coupler, qhov chaw nres nkoj thib plaub muaj qhov xaus. Qhov xaus tsis tshem tawm lub zog tshwj tsis yog tias muaj qee yam tsis zoo tshwm sim, xws li ib lub amp tsis ua haujlwm lossis cov amplifiers muaj cov theem sib txawv.
Hom Kev Faib
Muaj ntau hom thiab ntau hom ntawm cov khoom faib fais fab lossis cov khoom sib txuas. Qee qhov ntawm cov uas pom ntau tshaj plaws suav nrog:
Wilkinson lub tshuab faib hluav taws xob
Ib qho Wilkinson divider faib ib lub teeb liab nkag mus rau hauv ob lub teeb liab tso zis sib npaug, lossis muab ob lub teeb liab sib npaug ua ke rau hauv ib qho hauv qhov kev taw qhia rov qab. Ib qho Wilkinson divider vam khom cov transformers quarter-wave kom phim qhov chaw nres nkoj sib cais. Ib qho resistor muab tso rau ntawm cov zis, qhov twg nws tsis ua rau lub teeb liab nkag ntawm Chaw nres nkoj 1 puas tsuaj. Qhov no txhim kho kev sib cais zoo heev thiab tso cai rau txhua qhov chaw nres nkoj kom raug impedance phim. Hom divider no feem ntau siv rau hauv ntau-channel xov tooj cua zaus systems vim nws tuaj yeem muab qib siab ntawm kev sib cais ntawm cov chaw nres nkoj tso zis. Los ntawm cascading ntau lub quarter wave seem, Wilkinson's tuaj yeem yooj yim tswj 9: 1 bandwidths ntawm electronic warfare systems.
Raws li lub npe qhia, RF/microwave fais fab faib yuav faib ib lub teeb liab nkag mus rau hauv ob lub teeb liab sib npaug thiab zoo ib yam (piv txwv li hauv-theem). Nws kuj tseem siv tau ua lub zog sib txuas, qhov twg qhov chaw nres nkoj sib koom yog qhov tso zis thiab ob lub zog sib npaug yog siv ua cov tswv yim. Cov lus qhia tseem ceeb thaum siv ua lub zog faib suav nrog qhov poob ntawm kev ntxig, qhov loj thiab theem sib npaug ntawm cov caj npab, thiab kev poob rov qab. Rau kev sib txuas fais fab ntawm cov teeb liab tsis sib xws, qhov kev qhia tseem ceeb tshaj plaws yog kev rho tawm, uas yog qhov poob ntawm kev ntxig los ntawm ib qho chaw nres nkoj fais fab sib npaug mus rau lwm qhov.
Cov Khoom Siv Faib Fais FabCov yam ntxwv
• Cov khoom faib fais fab siv tau ua cov khoom sib txuas lossis cov khoom faib hluav taws xob
• Wilkinson thiab High isolation power dividers muab kev sib cais siab, thaiv kev sib txuas lus ntawm cov teeb liab ntawm cov chaw tso zis
• Kev ntxig thiab rov qab poob qis
• Wilkinson thiab resistive power dividers muab kev zoo heev (<0.5dB) amplitude thiab (<3°) theem sib npaug
Si Chuan Keenlion Microwave muaj ntau yam kev faib hluav taws xob 2-txoj kev hauv cov qauv narrowband thiab broadband, npog cov zaus ntawm DC mus rau 50 GHz. Lawv tau tsim los tswj hwm los ntawm 10 txog 30 watts lub zog nkag hauv 50-ohm kis kab ke. Cov qauv Microstrip lossis stripline raug siv, thiab ua kom zoo tshaj plaws rau kev ua haujlwm 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 tuaj yeem kho qhov faib fais fab raws 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.
Lub sijhawm tshaj tawm: Lub Yim Hli-09-2022
