Mu chiphunzitso cha antenna, ubale pakati pa kutalika kwa antenna ndi kutalika kwa mafunde ogwirira ntchito ndi chimodzi mwazinthu zofunika kwambiri zomwe zimakhudza magwiridwe antchito a radiation. Antena yayitali ya waya ndi chitsanzo chodziwika bwino. Mosiyana ndi dipole yayifupi kapena dipole ya theka la mafunde, antenna yayitali ya waya nthawi zambiri imakhala ndi kutalika kwakuthupi kopitilira mafunde amodzi kapena imapangidwa ndi magawo angapo a theka la mafunde.
Mwachidule, kutalika kwa antenna yayitali ya waya kungafotokozedwe motere:
L = nx lambda / 2
Mu mawu awa, L ndi kutalika kwa antenna, lambda ndi kutalika kwa mafunde, ndipo n ikuyimira chiwerengero cha magawo a theka la mafunde. Pamene kutalika kukuwonjezeka, mawonekedwe a kuwala kwa antenna amakhala olunjika kwambiri. Izi zikutanthauza kuti antenna yayitali ya waya imatha kuyika mphamvu zambiri mbali zina m'malo mowala mofanana mbali zonse.
Chifukwa Chake Kutalika kwa Antena N'kofunika
Kutalika kwa ma antenna kumakhudza mwachindunji kufalikira kwa ma current, impedance, gain ndi radiation pattern. Pamene antenna ikhala yayitali, ma current omwe ali pa waya sagwiranso ntchito ngati radiator yochepa. M'malo mwake, magawo osiyanasiyana a waya amathandizira pa radiation pattern yomaliza. Zotsatira zake, antenna ikhoza kupanga ma dayamondi opapatiza, ma lobes angapo komanso ma directionivity apamwamba.
Kwa mainjiniya omwe amagwira ntchito yokonza ma antenna a RF, njira zolumikizirana kapena muyeso wa ma antenna, kumvetsetsa ubalewu ndikofunikira. Ngakhale kuti zinthu zamakono za ma antenna a microwave zitha kugwiritsa ntchito ma antenna a horn, ma waveguide structures, ma antenna olinganiza kapena ma reflector antennas, mfundo yoyambira imakhalabe yomweyo: kutalika kwa mafunde, kapangidwe ka thupi ndi momwe ma radiation amagwirira ntchito zimagwirizana kwambiri.
Mitundu Iwiri Ikuluikulu ya Ma Antena Atali A Waya
Ma antenna aatali a waya nthawi zambiri amakambidwa m'magulu awiri: ma antenna ozungulira ndi ma antenna osakhala ozungulira.
Antena ya waya wautali wozungulira imagwira ntchito pafupipafupi pomwe mafunde oyima amapangidwa motsatira kondakitala. Pankhaniyi, kutalika kwa antena kumagwirizana kwambiri ndi pafupipafupi yogwirira ntchito. Mphamvu imayenda motsatira antena ndipo gawo lake likhoza kuwonetsedwa, ndikupanga mawonekedwe a mafunde oyima. Chifukwa cha khalidweli, antena a waya wautali wozungulira nthawi zambiri amaonedwa ngati mapangidwe a nthawi ndi nthawi ndipo amatha kuwonetsa mawonekedwe a ma radiation a mbali ziwiri.
Antena yayitali yopanda mawaya nthawi zambiri imapangidwa kuti ichepetse kuwunikira ndikuthandizira machitidwe oyenda ndi mafunde. Antena nthawi zambiri imathetsedwa ndi katundu woyenera kotero kuti mafunde amayenda mbali imodzi. Izi zimathandiza kuchepetsa mafunde oyima ndipo zingapangitse kuti kuwala kwa antena kulamuliridwe bwino. Mu mtundu uwu wa antena, kufananiza kwa impedance ndikofunikira kwambiri chifukwa kumakhudza momwe mphamvu imaperekedwera komanso kufalikira bwino.
Chitsanzo ndi Malangizo a Radiation
Chinthu chimodzi chofunikira cha antenna yayitali ya waya ndi momwe imawongolera. Pamene kutalika kwa waya kukuwonjezeka, antenna imatha kupanga kuwala kwamphamvu mbali zosiyanasiyana. Komabe, izi sizitanthauza kuti kapangidwe kake kamakhala kosavuta. Waya yayitali ingapangitsenso ma lobes angapo am'mbali, omwe ayenera kuganiziridwa popanga makina ndi kuyesa antenna.
Pa ntchito zogwira ntchito za RF, mainjiniya ayenera kuwunika momwe ma radiation a antenna amagwirira ntchito, kuchuluka, polarization, ndi mawonekedwe a impedance amagwirira ntchito. Ma parameter awa amathandiza kudziwa ngati antenna ndi yoyenera kulumikizana, machitidwe oyesera, zoyeserera za labotale kapena malo ena a RF.
Kulumikizana ndi RF ndi Kuyesa kwa Microwave
Ngakhale kuti ma antenna aatali nthawi zambiri amayambitsidwa ngati mutu woyambira wa chiphunzitso cha ma antenna, malingaliro omwe ali kumbuyo kwawo ndi ofunikiranso mu RF ndi microwave engineering. Mu kuyesa kwa ma antenna aukadaulo, mainjiniya nthawi zambiri amayerekeza mitundu yosiyanasiyana ya ma antenna poyesa kuchuluka, VSWR, kutsogolera, polarization ndi radiation pattern.
RF MISO imapanga ndikupanga ma antenna ndi zida zolumikizirana kuti zigwiritsidwe ntchito pamakampani, zoyesera komanso zoyesera. Zinthu monga ma antenna a horn, ma waveguide probes, ma antenna owunikira, ma antenna olinganiza ndi zigawo za microwave zimagwiritsidwa ntchito kwambiri poyesa ma antenna, kuyesa ma RF ndi kafukufuku wa makina olumikizirana. Kumvetsetsa chiphunzitso choyambira cha ma antenna kumathandiza mainjiniya kusankha ma antenna oyenera ndikupanga makina oyesera odalirika.
Mwachitsanzo, posankha antenna yoyesera, mainjiniya angafunike kuganizira izi:
- Mafupipafupi ogwirira ntchito
- Kupeza ndi kutsogolera
- Kugawanika
- VSWR ndi kufananiza impedance
- Kukhazikika kwa mawonekedwe a radiation
- Kapangidwe ka makina ndi momwe amakhazikitsira
- Kugwirizana ndi machitidwe oyezera
Zinthu izi sizimangokhudza ma antenna atali a waya okha. Ndi zofunikanso pa ma antenna a microwave horn, ma antenna a waveguide ndi zinthu zina zaukadaulo za RF antenna.
Ntchito ndi Mtengo wa Uinjiniya
Chiphunzitso cha ma antenna a waya wautali n'chothandiza kumvetsetsa kuwala kolunjika, kapangidwe kogwirizana ndi kutalika kwa mafunde ndi machitidwe oyendayenda. Mu ntchito yeniyeni yauinjiniya, mfundo zofanana zimawonekera m'mapangidwe ambiri a ma antenna, kuphatikiza ma antenna a V, ma antenna a rhombic, ma antenna a log-periodic ndi machitidwe ena a ma antenna olunjika.
Pa ntchito zamakono za RF ndi microwave, magwiridwe antchito a antenna ayenera kutsimikiziridwa kudzera mu muyeso woyenera. Antena yopangidwa bwino siyenera kungokwaniritsa zofunikira za chiphunzitso chokha komanso kugwira ntchito moyenera pamalo enieni ogwirira ntchito. Ichi ndichifukwa chake kuyeza kwa antenna ndi kuyesa kwa RF ndizofunikira kwambiri pakupanga zinthu ndi kuphatikiza makina.
Mapeto
Antena yayitali ya waya ndi lingaliro lofunika kwambiri mu chiphunzitso cha antena. Kutalika kwake, kutalika kwa nthawi, momwe imagwirira ntchito komanso njira yomaliza zonse zimakhudza mawonekedwe a radiation ndi kuwongolera. Pomvetsetsa kusiyana pakati pa antena yayitali ya waya yolumikizana ndi yosalumikizana, mainjiniya amatha kumvetsetsa bwino momwe kapangidwe ka antena kamakhudzira magwiridwe antchito a RF.
Kwa makasitomala omwe amagwira ntchito yoyezera ma antenna, kuyesa ma microwave, machitidwe olumikizirana kapena kafukufuku wa labotale, RF MISO imapereka zinthu za ma antenna ndi chithandizo chaukadaulo pamitundu yosiyanasiyana ya ma RF ndi ma microwave. Lumikizanani ndi RF MISO kuti mukambirane za kuchuluka kwa ma frequency omwe mukufuna, mtundu wa ma antenna ndi zofunikira pakuyesa.
GAWO LOFUNSIDWA POFUNSIDWA
Q1: Kodi antenna yayitali ya waya ndi chiyani?
Antena yayitali ya waya ndi antena yomwe kutalika kwake nthawi zambiri kumakhala kokulirapo kuposa kutalika kwa funde limodzi kapena imakhala ndi magawo angapo a theka la kutalika kwa mafunde. Kapangidwe kake ka kuwala kamakhala kolunjika kwambiri pamene kutalika kwa antena kumawonjezeka.
Q2: Kodi pali kusiyana kotani pakati pa ma antenna a waya aatali a resonant ndi osa resonant?
Antena ya waya wautali wolumikizana imapanga mafunde oyima pafupipafupi inayake, pomwe antena ya waya wautali wosalumikizana nthawi zambiri imapangidwa kuti izithandizira machitidwe oyenda-mafunde ndikuchepetsa kuwunikira kudzera mu kutha koyenera.
Q3: N’chifukwa chiyani kuyeza kwa antenna n’kofunika?
Kuyeza kwa ma antenna kumathandiza kutsimikizira kuchuluka kwa ma radiation, mawonekedwe a radiation, polarization, VSWR ndi kufananiza kwa impedance. Ma parameter awa ndi ofunikira pakuyesa ma RF, machitidwe olumikizirana ndi ma microwave.
Q4: Kodi chiphunzitso cha antenna ya waya wautali chikugwirizana bwanji ndi kuyesa antenna ya microwave?
Chiphunzitso cha antenna ya waya wautali chimafotokoza ubale womwe ulipo pakati pa kutalika kwa mafunde, kutalika kwa antenna ndi momwe kuwala kumakhalira. Mfundo zimenezi zimathandizanso poyesa ma antenna a horn, ma antenna otsogolera mafunde, ma antenna owunikira ndi zinthu zina za RF antenna.
Kuti mudziwe zambiri zokhudza ma antenna, chonde pitani ku:
Nthawi yotumizira: Julayi-03-2026
