Chii chinonzi VSWR - Nyore Inotungamira yeRF Vanotanga

VSWR nyore gwara kune vanotanga     

  

VSWR yagara iri imwe yeakanyanya kukosha paramita muRF masisitimu nekuti inoratidza kushanda kweiyo yese RF system.

  

Kana iwe uri kushandisa nhepfenyuro, saka iwe unofanirwa kuve nehanya nekubatana pakati peantenna uye feeder, nekuti chete kana zvakanyatsoenderana, ivo vanoita kuti nhepfenyuro yako yeredhiyo itepfenyure nekunyatsogona kana kuderera VSWR.

  

Saka, chii chinonzi VSWR? Neraki, kunyangwe nekuoma kwedzidziso yeVSWR, chinyorwa ichi chinogona kutsanangura iyo pfungwa uye izvo zvaunoda kuziva nenzira iri nyore kunzwisisa. Kunyangwe iwe uri wekutanga RF, unogona kunzwisisa zviri nyore zvinoreva VSWR. Ngatitangei!

  

Chii chinonzi VSWR?

  

Kutanga, tinofanira kuziva kuti chii chinonzi kumira wave. Masaisai akamira anomiririra simba risingagamuchirwe nemutoro uye rinoratidzwa kumashure pamwe nemutsetse wekutumira kana feeder. 

  

Hapana angade kuti izvi zviitike, nekuti kutaridzika kwemafungu akamira panzvimbo yeRF system kunyatsoita kwakaderedzwa.

  

Uye isu tinoda kutsanangura zvinoreva VSWR maererano nekuverenga, ndiyo chiyero cheiyo yakanyanya kukosha yevoltage paRF mutsara kune iyo shoma kukosha. 

  

Naizvozvo, rinowanzo kuratidzwa se 2:1, 5:1, ∞:1, zvichingodaro. Ipo 1:1 inoreva kuti kushanda kweiyo RF system kunosvika zana, nepo ∞:100 zvichireva kuti mwenje wese wesimba unoratidzwa kumashure. . Izvo zvakakonzeresa kubva kune impedance mismatches pamwe nemutsetse wekutapurirana.

  

Kuti uwane iyo yakakwira simba rekufambisa kubva kutsime kuenda kutambo yekutapurirana, kana tambo yekutumira kune mutoro, ingave inopikisa, yekuisa kune imwe sisitimu, kana antenna, iyo impedance mazinga anofanira kuenderana.

  

Mune mamwe mazwi, kune 50Ω sisitimu, kwainobva kana chiratidzo jenareta inofanirwa kunge iine sosi impedance ye50Ω, mutsara wekutumira unofanirwa kunge uri 50Ω uye saizvozvowo mutoro.

  

Mukuita, pane kurasikirwa pane chero feeder kana tambo yekufambisa. Kuyera iyo VSWR, kumberi uye kumashure simba rinoonekwa panguva iyoyo muhurongwa uye izvi zvinoshandurwa kuita nhamba yeVSWR. Nenzira iyi, iyo VSWR inoyerwa pane imwe nzvimbo uye iyo voltage maxima uye minima haidi kutariswa pamwe nehurefu hwemutsara.

  

Ndeupi Musiyano uripo pakati peSWR neVSWR?

   

Mazwi ekuti VSWR uye SWR anowanzoitika muzvinyorwa zvemafungu akamira muRF masisitimu, uye vanhu vazhinji vanoshamisika kuti zvipi zvinosiyanisa. Uye hezvino izvo zvaunoda:

   

SWR: SWR inomirira Standing Wave Ratio. Inotsanangura mafungu emagetsi uye aripo akamira anoonekwa pamutsetse. Itsanangudzo yakajairika yeazvino uye voltage akamira masaisai. Inowanzo shandiswa pamwe chete nemamita inoshandiswa kuona VSWR.

   

VSWR: VSWR kana voltage yakamira wave reshiyo inoreva chaizvo mafungu akamira emagetsi akaiswa pane yekudyisa kana tambo yekufambisa. Izwi rekuti VSWR rinowanzo shandiswa, kunyanya muRF dhizaini, nekuti zviri nyore kuona mafungu akamira emagetsi uye, kazhinji, magetsi anonyanya kukosha maererano nekuparara kwemudziyo.

  

Zvese mumashoko, zvinoreva VSWR uye SWR zvakafanana pasi pemamiriro asina kuomesesa.

  

VSWR Inobata Sei RF Systems?

   

Pane nzira dzakati wandei idzo VSWR inogona kukanganisa mashandiro eiyo transmitter system kana chero system inogona kushandisa RF uye yekufananidza impedance. Inotevera rondedzero pfupi yezvikumbiro:

   

1. Transmitter simba amplifiers inogona kuputswa -Kuwedzera voltage uye mazinga azvino pane feedline nekuda kweVSWR inogona kukuvadza inobuda transistors yetransmitter.

 

2. PA kuchengetedzwa kunogona kuderedza simba rekubuda -Kusawirirana pakati peiyo feedline uye antenna kunozokonzera yakakwira SWR, iyo inogona kukonzeresa matanho ekudzivirira edunhu anogona kutungamira mukudzikiswa kwekubuda, zvichikonzera kurasikirwa kukuru kwesimba rekufambisa.

 

3. High voltage uye ikozvino mazinga anogona kukuvadza feedline - Yakakwira voltage uye yazvino mazinga akakonzerwa neVSWR yakakwira anogona kukonzera kukuvadzwa kune feedline.

 

4. Kunonoka kunokonzerwa nekufungisisa kunogona kukonzera kukanganisa - Kana chiratidzo chisina kufananidzwa uye chinoratidzwa, chinoratidzwa kumashure kune kwakabva uye chinogona kuratidzwa kudzoka kune antenna zvakare. Iko kunonoka kwakaunzwa kwakaenzana nekaviri nguva yekutumira chiratidzo pamwe nemutsara wekudya.

 

5. Kuderedzwa kwechiratidzo kuenzaniswa nehurongwa hwakanyatsoenderana -Chero chiratidzo chinoratidzwa nemutoro chinozoratidzwa kumashure kune chinotapurirana uye chinogona kuitwa kuti chiratidze kudzoka kune antenna zvakare, zvichikonzera kudzikiswa kwechiratidzo.

      

    mhedziso

        

    Muchikamu chino, tinoziva tsananguro yeVSWR, mutsauko uripo pakati peVSWR neSWR, uye kuti VSWR inobata sei RF masisitimu.

       

    Neruzivo urwu, kunyangwe usingakwanise kugadzirisa zvizere matambudziko aungasangana nawo neVSWR, unogona kuve neruzivo rwakajeka nezvazvo uye edza kudzivirira kukuvara kwaungakuunzira.

       

    Kana uchida kuziva zvakawanda nezve nhepfenyuro yeredhiyo, titevere!

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