Zolumikizira za Coaxial RF ndizofunikira kwambiri zotumizira ma RF m'munda wa microwave ndipo zimagwiritsidwa ntchito kwambiri pazida / zigawo zingapo za microwave, zida zolumikizirana ndi ma microwave, zida ndi makina a radar.
Mitundu yolumikizira ma RF coaxial: Ndikukula kwachangu kwaukadaulo wamalumikizidwe opanda zingwe ndi ukadaulo wa radar m'zaka zaposachedwa, kuchulukitsa kaphatikizidwe kakatundu kumafuna kuwonjezereka kwamagetsi otumizira. Monga gawo la makina onse a ma microwave, zolumikizira za RF coaxial ziyenera kupirira-zofunikira pakutumiza magetsi. Mainjiniya a RF nthawi zambiri amayesa{{3}mphamvu kwambiri ndi kuyeza mphamvu, ndipo zida zosiyanasiyana za ma microwave ndi zida zomwe zimagwiritsidwa ntchito poyesa zimafunikiranso-mphamvu zamphamvu. Izi zimapangitsa kuti pakhale kuchuluka kwamphamvu kwamphamvu kwa zolumikizira za RF coaxial, chizindikiro chachikulu cha RF coaxial cholumikizira. Ndiye, mumadziwa zochuluka bwanji za mphamvu ya RF coaxial zolumikizira? Kuchuluka kwamphamvu kwa zolumikizira za RF coaxial ndizovuta, zomwe zimakhudzidwa ndi zinthu zambiri, zina zomwe zimalumikizana. Zinthu izi zimaphatikizanso kukula kwa cholumikizira (kuphatikiza kukula kwa pinhole), ma frequency ogwiritsira ntchito, zinthu zakuthupi, zotchingira, kudalirika kolumikizana, kukana kulumikizana, chiŵerengero cha mafunde amagetsi (VSWR), kutentha kozungulira, komanso kutalika. Chithunzi chomwe chili pansipa chikuwonetsa mphamvu zamphamvu za Megaphase pazolumikizira zosiyanasiyana za RF pama frequency osiyanasiyana. Mukamapanga zinthu za RF, mutha kusankha cholumikizira choyenera kutengera kuchuluka kwa ntchito komanso mphamvu yogwirira ntchito.
Kenako, tipereka tsatanetsatane wazinthu zomwe zimakhudza mphamvu ya zolumikizira za RF coaxial. Kwa ma siginecha a RF a ma frequency omwewo, zolumikizira zazikuluzikulu zimakhala ndi mphamvu zowongolera mphamvu. Mwachitsanzo, kukula kwa pinhole cholumikizira kumagwirizana ndi mphamvu yaposachedwa ya cholumikizira, chomwe chimagwirizana mwachindunji ndi mphamvu. Pakati pa zolumikizira za RF coaxial zomwe zimagwiritsidwa ntchito nthawi zambiri, 7/16 (DIN), 4.3-10, ndi N-zolumikizira zamtundu wa N- zimakhala zazikulu, zogwirizana ndi makulidwe a pinhole okulirapo. Nthawi zambiri, mphamvu yogwira mphamvu ya cholumikizira chamtundu wa N{10} imakhala pafupifupi kuwirikiza katatu kapena kanayi kuposa ya SMA. Kuchulukirachulukiraku kwa zolumikizira zamtundu wa N{12}zimafotokoza chifukwa chake zinthu zambiri zomwe zimagulitsidwa pamsika, monga zolumikizira zamagetsi ndi zonyamula mphamvu zopitilira 200W, zimagwiritsa ntchito zolumikizira zamtundu wa N{16}}. RFbuy (www.rfbuy.com) imapereka mwayi wofikira-zonyamula mphamvu zambiri, zoziziritsa kukhosi, ndi zida zina za ma microwave. Kuthekera kwamphamvu kwa zolumikizira za RF coaxial kumachepa ndi kuchuluka kwa ma sigino. Kusintha kwa ma frequency amasinthidwe opatsirana kumakhudza mwachindunji kutayika kwa ma transmission ndi voltage Stand wave ratio (VSWR), zomwe zimakhudzanso mphamvu yotumizira. Komanso, zotsatira za khungu zimatha kukhalapo. Mwachitsanzo, cholumikizira wamba cha SMA chili ndi mphamvu yogwira pafupifupi 500W pa 2GHz, koma mphamvu yogwiritsira ntchito mphamvu yosakwana 100W pa 18GHz. Malinga ndi RFbuy RF Mall (www.rfbuy.com), zida zambiri zomwe sizimangokhala, monga zowongolera ndi zonyamula, zomwe zimagwira pamafuriji opitilira 18 GHz zili ndi mphamvu yapakati yochepera 100 W. Pamafunde a ma millimeter mafunde, 1.85mm 67 GHz yokhazikika yokhazikika, ndipo mphamvu yochepera 6mm 8 W. Kulemera kwa GHz kuli ndi mphamvu yocheperapo ya 22 W. Kusankha kowonjezereka kwa 2.92mm attenuators ndi katundu zilipo, ndi mphamvu pafupifupi 100 W. RF zolumikizira amapangidwa ndi kutalika kwa magetsi. Mumzere wochepera-wautali, pamene cholepheretsa ndi kulemedwa kwake sikufanana, gawo lina la voteji ndi mphamvu yamagetsi yochokera pa katunduyo zimabwereranso ku magetsi. Mafundewa amatchedwa ma wave wave, pomwe mphamvu yamagetsi ndi yapano kuchokera kumagetsi kupita ku katunduyo imatchedwa ma wave wave. Mafunde ophatikizidwa a chochitikacho ndi mafunde owonetseredwa amatchedwa mafunde oima. Chiyerekezo cha kuchuluka kwa ma voliyumu apamwamba komanso ochepera a mafunde oyimilira amatchedwa voltage Stand wave ratio (yomwe imadziwikanso kuti Stand wave wave). Mafunde owonetseredwa amakhala ndi mphamvu ya chiteshi, amachepetsa mphamvu yotumizira. Kutayika kwa insertion (IL) kumatanthawuza kutayika kwa mphamvu mu mzere chifukwa cha kuyambitsidwa kwa cholumikizira cha RF. Zimatanthauzidwa ngati chiŵerengero cha mphamvu zotulutsa mphamvu zolowera. Zinthu zambiri zimathandiza kuti cholumikizira chiwonongeke, kuphatikizapo kusagwirizana kwa khalidwe, zolakwika za kamangidwe, zomangirira mapeto-kutsegula maso, kupendekeka kwa axis, lateral offset, eccentricity, kulondola kwa makina, ndi plating. Kutayika kumapanga kusiyana pakati pa kulowetsa ndi kutulutsa mphamvu, zomwe zimakhudzanso kuyendetsa mphamvu. Kusintha kwa kuthamanga kwa mpweya pamalo okwera kumayambitsa kusinthasintha kwa magawo a dielectric a magawo a mpweya, ndipo pakapanikizika pang'ono, mpweya umakhala wosavuta ku ionization, kutulutsa corona. Kukwera kwapamwamba ndi kutsika kwa mpweya wothamanga, kutsika kwa mphamvu yogwiritsira ntchito mphamvu. Kukana kulumikizana: Kukana kolumikizana kwa cholumikizira cha RF kumatanthawuza kukana komwe kumalumikizana pakati pa ma conductor amkati ndi akunja pomwe cholumikizira chalumikizidwa. Nthawi zambiri amayezedwa mu milliohm ndipo ayenera kukhala otsika momwe angathere. Imawunika makamaka mawonekedwe a makina olumikizirana, ndipo zotsatira za kukana kochulukirapo ndi kukana kwa mgwirizano wa solder ziyenera kuthetsedwa pakuyezera. Kukana kulumikizana kumayambitsa kutenthetsa pa zolumikizira, zomwe zimapangitsa kuti zikhale zovuta kutumiza ma siginecha amphamvu kwambiri a microwave. Zida zolumikizira: Mphamvu yogwiritsira ntchito mphamvu yolumikizira yomweyi imatha kusiyanasiyana malinga ndi zida zomwe zimagwiritsidwa ntchito.