Ma antenna otseguka ndi gulu lofunika kwambiri la ma antenna omwe amagwiritsidwa ntchito kwambiri mu makina oyezera ma microwave, ma millimeter-wave, radar, kulumikizana, ndi ma antenna. Mosiyana ndi ma antenna a waya, omwe amatuluka makamaka kudzera mu mafunde oyenda motsatira zinthu zoyendetsera magetsi, ma antenna otseguka amatulutsa mphamvu yamagetsi kudzera mu kutsegula kapena kutsegula.
Chitsanzo chodziwika bwino ndi chitsogozo cha mafunde chotseguka. Pamene mafunde amagetsi amayenda kudzera mu chitsogozo cha mafunde ndikufika kumapeto otseguka, gawo la mphamvu yotsogozedwa limawulutsidwa m'malo omasuka. Mwa kuwongolera mawonekedwe a aperture, kugawa kwa malo, ndi kapangidwe kozungulira, mainjiniya amatha kusintha kwambiri mawonekedwe a impedance, directionactivity, gain, ndi radiation.
Ma antenna odziwika bwino a mtundu wa aperture ndi awa:ma antenna otseguka okhala ndi mafunde,ma antenna a nyanga, ndi ma antenna olowetsa zinthuNkhani yoyambirira yofotokozera imaphatikizanso zinthu zitatuzi pansi pa ma antenna otseguka.
1. Kodi Antena Yotseguka Ndi Chiyani?
Mu uinjiniya wa ma antenna, malo otseguka amatha kuonedwa ngati malo otseguka omwe ma electromagnetic fields amalumikizana kuchokera ku nyumba yotsogozedwa kupita ku malo omasuka.
Chitsogozo cha mafunde chimapangidwa kuti chizitseke ndikutsogolera mphamvu yamagetsi. Ngati chitsogozo cha mafunde chatsekedwa ndi khoma loyendetsa magetsi, mphamvuyo imakhala yotsekedwa kapena imawonetsedwa malinga ndi momwe imathera. Komabe, chitsogozo cha mafunde chikatsegulidwa, munda wamagetsi womwe uli pamalo otseguka ukhoza kufalikira m'malo omasuka.
Chifukwa chake, malo otseguka amagwira ntchito ngati dera losinthira pakati pa njira yoyendetsedwa ndi maginito ndi mafunde amagetsi ojambulidwa.
Makhalidwe enieni a ma radiation amadalira zinthu zingapo, kuphatikizapo:
- Miyeso ndi mawonekedwe a kabowo
- Kutalika kwa nthawi yogwirira ntchito
- Mawonekedwe a Waveguide
- Kugawa kwa magetsi ndi maginito
- Kapangidwe ka flange kapena kozungulira
- Kufananiza kwa impedance pa aperture
Kafukufuku wokhudza ma waveguides otseguka a rectangular waveguides akuwonetsa kuti minda yotseguka komanso diffraction kuchokera m'mphepete mwa flange yozungulira zingathandize kuti minda yotulukayo iwonongeke.
Chithunzi 1. Chitsanzo cha kapangidwe ka mafunde amakona anayi komwe kamagwiritsidwa ntchito posonyeza kuwala kwa m'bowo.
2. Kodi Chitsogozo cha Mafunde Chotseguka Chimawala Bwanji?
Pamene njira yolumikizira mafunde ikufika pamalo otseguka, malire a maginito amasintha mwadzidzidzi. Minda siikhala yotsekedwa kwathunthu ndi makoma oyendetsera magetsi, zomwe zimapangitsa kuti gawo lina la mphamvu ya maginito liziwonekera m'malo omasuka.
Nthawi yomweyo, kusintha kuchokera ku waveguide kupita ku malo omasuka nthawi zambiri sikukugwirizana bwino. Chifukwa chake mphamvu zina zimatha kuwonekeranso mu waveguide.
Ubale uwu pakati pakuwala ndi kuwunikirandi gawo lofunika kwambiri pa kapangidwe ka antenna yotseguka.
Chitsogozo chosavuta cha mafunde chotseguka chingagwire ntchito ngati antenna, koma mphamvu yake yowunikira, kufananiza kwa impedance, kuchuluka kwake, ndi mawonekedwe a beam sizingakhale zabwino kwambiri pa ntchito iliyonse. Mainjiniya amatha kusintha mawonekedwe a aperture kuti agwire bwino ntchito. Chimodzi mwa zitsanzo zodziwika bwino ndiantenna ya nyanga, momwe mafunde amatambasukira pang'onopang'ono kupita ku malo otseguka.
3. Kuchuluka kwa Ma Antena Ogwira Ntchito
Palibe ma frequency ogwiritsira ntchito omwe alipo padziko lonse lapansi pa ma aperture antenna onse.
Kuchuluka kwa ma frequency omwe angagwiritsidwe ntchito a antenna yotseguka pogwiritsa ntchito mafunde kumadalira kwambirikukula kwa waveguide, mtundu wa waveguide, njira zothandizira kufalitsa, ndi ma cutoff frequency.
Chifukwa chake, makulidwe osiyanasiyana a ma waveguide amagwiritsidwa ntchito pa ma microwave osiyanasiyana ndi ma millimeter-wave frequency bands.
Izi ndizofunikira kwambiri m'machitidwe a RF okhala ndi ma frequency apamwamba. Pamene ma frequency akuwonjezeka ndipo ma wavelength akufupika, kukula kwa ma waveguide ndi ma aperture kumachepanso, zomwe zimapangitsa kuti ma aperture antenna agwiritsidwe ntchito bwino m'machitidwe a microwave, millimeter-wave, komanso ngakhale sub-THz.
4. Kapangidwe ka Kuwala kwa Antena Yotseguka
Kapangidwe ka kuwala kwa antenna yotseguka kamadalira kwambiri kukula kwa denga, kufalikira kwa malo, momwe amagwirira ntchito, kutalika kwa denga, ndi kapangidwe kozungulira.
Chitsogozo cha mafunde chotseguka nthawi zambiri chimapanga kuwala kotakata, koma sichiyenera kufotokozedwa ngati antenna yolunjika mbali zonse. Makhalidwe ake a radiation ya E-plane ndi H-plane amatsimikiziridwa ndi kufalikira kwa malo amagetsi pamwamba pa aperture.
Flange yozungulira ingakhudzenso mawonekedwe a ma radiation omwe amabwera chifukwa minda yomwe imafalikira m'mbali mwake imathandizira ku gawo lonse la radiation. Kafukufuku wamakono wofufuza amafotokoza momveka bwino ma radiation a aperture ndi ma diffraction a flange-edge powerengera momwe zinthu zilili kutali.
Kuonjezera kukula kwa malo otseguka bwino nthawi zambiri kungapereke chiwongolero chapamwamba komanso kuwala kopapatiza, chomwe ndi chimodzi mwa zifukwa zomwe ma antenna a horn ndi mapangidwe akuluakulu a malo otseguka amagwiritsidwa ntchito nthawi zambiri pakafunika kukwera kwakukulu.
Chitsanzo cha Radiation Chosalunjika
5. Mitundu Yaikulu ya Ma Antena Otseguka
Antena Yotsogolera Mafunde Yotseguka
Chitsogozo cha mafunde chotseguka ndi chimodzi mwa ma radiator osavuta kwambiri okhala ndi ma aperture. Kapangidwe kake kakang'ono komanso kugwirizana kwake mwachindunji ndi machitidwe a mafunde kumapangitsa kuti chikhale chothandiza m'ma laboratories a ma microwave ndi ma millimeter-wave, muyeso wa ma antenna, ma probe, ma feed, ndi machitidwe ena a RF.
Antena ya Horn
Antena ya nyanga imatha kuonedwa ngati chitsogozo cha mafunde chomwe gawo lake limakula pang'onopang'ono kupita ku malo otseguka. Kusintha pang'onopang'ono kumeneku kumawongolera kusintha kuchokera ku mafunde otsogozedwa kupita ku kuwala kwa malo omasuka ndipo kungapereke kufananiza bwino kwa impedance, kuchulukitsa phindu, komanso mawonekedwe owongolera kwambiri a ma radiation.
Ma antenna a nyanga amagwiritsidwa ntchito kwambiri poyesa ma antenna, kuyesa kwa EMC, radar, machitidwe olumikizirana, machitidwe odyetsa, ndi ntchito zama millimeter-wave.
Antena ya slot
Antena yolowetsa malo imagwiritsa ntchito kutsegula kapena kudula malo olumikizira kuti iwonetse mphamvu yamagetsi. Kutengera ndi mawonekedwe a malo olowetsa malo, kusangalatsa, ndi kapangidwe kozungulira, ma antenna olowetsa malo amatha kugwiritsidwa ntchito payekhapayekha kapena kuphatikiza m'magulu.
Amagwiritsidwa ntchito kwambiri m'makina a microwave komwe kumafunika mapangidwe otsika, kuphatikiza, kapena makonzedwe a array.
6. Ma Antena a Aperture mu RF ndi Microwave Engineering
Popeza ma aperture antenna amalumikizana mwachilengedwe ndi ma waveguide transmission structures, ndi ofunikira kwambiri pa ma microwave ndi ma millimeter-wave frequency.
Ntchito zomwe zimagwiritsidwa ntchito nthawi zambiri zimaphatikizapo:
- Kuyeza kuchuluka kwa ma antenna ndi mawonekedwe a radiation
- Kuyesa kwa EMC ndi EMI
- Machitidwe a radar
- Kulankhulana kwa ma microwave ndi ma millimeter-wave
- Makina odyetsera ma antenna
- Muyeso wa RF wa labotale
- Kutumiza ndi kulandira malangizo
- Machitidwe oyesera ndi owerengera
Kwa mainjiniya a antenna, kusankha antenna yoyenera yotsegulira kumafuna zambiri osati kungoganizira za kuchuluka kwa ma frequency. Ma parameter monga gain, beamwidth, polarization, VSWR, waveguide size, flange type, power handling, ndi ma mechanical dimensions onse angakhudze momwe dongosolo limagwirira ntchito.
Mapeto
Ma antenna otseguka amapereka njira yabwino yosinthira mphamvu yamagetsi yotsogozedwa kukhala kuwala kwa malo omasuka, zomwe zimapangitsa kuti akhale gulu lofunikira la ma antenna muukadaulo wa ma microwave ndi ma millimeter-wave.
Kuchokera ku ma waveguides osavuta otseguka mpaka ku ma horn ndi malo opangidwira bwino, ma aperture antenna amatha kupangidwira mitundu yosiyanasiyana ya gain, beamwidth, polarization, frequency range, ndi zofunikira zogwirizanitsa makina.
Kumvetsetsa momwe kukula kwa malo otseguka, kugawa kwa malo ogwiritsira ntchito magetsi, njira zoyendetsera mafunde, ndi zomangamanga zozungulira zimakhudzira magwiridwe antchito a ma radiation ndikofunikira kwambiri posankha kapena kupanga ma antenna a mayeso a RF, kulumikizana, radar, ndi machitidwe oyezera.
Nthawi yotumizira: Ogasiti-14-2026
