M'zaka zaposachedwapa, chifukwa cha kupita patsogolo mwachangu kwa kulumikizana kwa opanda zingwe ndi ukadaulo wa radar, kuti pakhale mtunda wotumizira mauthenga, ndikofunikira kuwonjezera mphamvu yotumizira mauthenga ya makinawo. Monga gawo la makina onse a microwave, zolumikizira za RF coaxial ziyenera kukhala zokhoza kupirira zofunikira zotumizira mauthenga za mphamvu yayikulu. Nthawi yomweyo, mainjiniya a RF amafunikanso kuchita mayeso ndi miyeso yamphamvu kwambiri, ndipo zida/zigawo za microwave zomwe zimagwiritsidwa ntchito poyesa zosiyanasiyana ziyeneranso kukhala zokhoza kupirira mphamvu yayikulu. Ndi zinthu ziti zomwe zimakhudza mphamvu ya zolumikizira za RF coaxial? Tiyeni tiwone.
● Kukula kwa cholumikizira
Pa zizindikiro za RF za ma frequency omwewo, zolumikizira zazikulu zimakhala ndi mphamvu yokulirapo. Mwachitsanzo, kukula kwa pinhole yolumikizira kumakhudzana ndi mphamvu yapano ya cholumikizira, yomwe imagwirizana mwachindunji ndi mphamvu. Pakati pa zolumikizira zosiyanasiyana za RF coaxial zomwe zimagwiritsidwa ntchito kwambiri, zolumikizira za 7/16 (DIN), 4.3-10, ndi N-type ndi zazikulu kukula, ndipo kukula kwa pinhole yofanana nayo ndi yayikulu. Kawirikawiri, mphamvu yolekerera ya zolumikizira za N-type ndi pafupifupi SMA nthawi 3-4. Kuphatikiza apo, zolumikizira za N-type zimagwiritsidwa ntchito kwambiri, ndichifukwa chake zigawo zambiri zopanda mphamvu monga zotetezera ndi katundu woposa 200W ndi zolumikizira za N-type.
● Kugwira ntchito pafupipafupi
Kulekerera mphamvu kwa zolumikizira za RF coaxial kudzachepa pamene ma frequency a chizindikiro akuwonjezeka. Kusintha kwa ma frequency a chizindikiro chotumizira mauthenga kumabweretsa kusintha kwa kutayika ndi kuchuluka kwa mafunde oyima pamagetsi, motero kumakhudza mphamvu yamagetsi yotumizira mauthenga ndi zotsatira za khungu. Mwachitsanzo, cholumikizira cha SMA chimatha kupirira mphamvu ya pafupifupi 500W pa 2GHz, ndipo mphamvu yapakati imatha kupirira zosakwana 100W pa 18GHz.
●Chiŵerengero cha mafunde oyima a voliyumu
Cholumikizira cha RF chimafotokoza kutalika kwa magetsi panthawi yopangira. Mu mzere wocheperako, pamene kukana kwapadera ndi kukana kwa katundu sizili zofanana, gawo la magetsi ndi mphamvu kuchokera kumapeto kwa katundu zimawunikidwanso kubwerera kumbali yamagetsi, yomwe imatchedwa mafunde. Mafunde owunikidwa; magetsi ndi mphamvu kuchokera ku gwero kupita ku katundu amatchedwa mafunde owunikidwa. Mafunde otsatira a mafunde owunikidwa ndi mafunde owunikidwa amatchedwa mafunde oyima. Chiŵerengero cha mphamvu yayikulu yamagetsi ndi mtengo wocheperako wa mafunde oyima chimatchedwa chiŵerengero cha mafunde oyima amagetsi (chingakhalenso chiŵerengero cha mafunde oyima). Mafunde owunikidwa amakhala pamalo opezeka mphamvu ya njira, zomwe zimapangitsa kuti mphamvu yotumizira ichepe.
●Kutayika kwa kuyika
Kutayika kwa magetsi (IL) kumatanthauza kutayika kwa mphamvu pa chingwe chifukwa cha kuyambitsidwa kwa zolumikizira za RF. Kutanthauzidwa ngati chiŵerengero cha mphamvu yotulutsa ndi mphamvu yolowetsa. Pali zinthu zambiri zomwe zimawonjezera kutayika kwa mphamvu yolowetsa cholumikizira, makamaka chifukwa cha: kusagwirizana kwa impedance yodziwika bwino, cholakwika cha assembly accuracy, mating end face gap, axis tilt, lateral offset, eccentricity, processing accuracy ndi electroplating, ndi zina zotero. Chifukwa cha kutayika, pali kusiyana pakati pa mphamvu yolowetsa ndi yotulutsa, zomwe zidzakhudzanso mphamvu yopirira.
●Kuthamanga kwa mpweya wa mtunda
Kusintha kwa kuthamanga kwa mpweya kumayambitsa kusintha kwa mphamvu ya dielectric ya gawo la mpweya, ndipo pakapanikizika kochepa, mpweya umasinthidwa mosavuta kuti upange korona. Pamene kutalika kuli kwakukulu, kuthamanga kwa mpweya kumakhala kochepa ndipo mphamvu yamagetsi imakhala yochepa.
●Kukana kukhudzana
Kukana kwa cholumikizira cha RF kumatanthauza kukana kwa mfundo zolumikizirana za ma conductor amkati ndi akunja pamene cholumikiziracho chalumikizidwa. Nthawi zambiri chimakhala mu mulingo wa milliohm, ndipo mtengo wake uyenera kukhala wochepa momwe ungathere. Makamaka chimawunika momwe makina amagwirira ntchito, ndipo zotsatira za kukana kwa thupi ndi kukana kwa solder joint ziyenera kuchotsedwa poyesa. Kukhalapo kwa kukana kwa kukhudzana kudzapangitsa kuti ma contactswo atenthe, zomwe zimapangitsa kuti zikhale zovuta kutumiza zizindikiro zazikulu za microwave.
●Zipangizo zolumikizirana
Cholumikizira chamtundu womwewo, pogwiritsa ntchito zipangizo zosiyanasiyana, chidzakhala ndi mphamvu zosiyana.
Kawirikawiri, ponena za mphamvu ya antenna, ganizirani mphamvu yake yokha ndi mphamvu ya cholumikizira. Ngati pakufunika mphamvu yayikulu, mungathesinthanicholumikizira chachitsulo chosapanga dzimbiri, ndi 400W-500W si vuto.
E-mail:info@rf-miso.com
Foni: 0086-028-82695327
Webusaiti: www.rf-miso.com
Nthawi yotumizira: Okutobala-12-2023
