Kodi Antena Yosinthidwa ya V Ndi Chiyani?
Antena ya V yosinthidwa ndi njira yogwiritsira ntchito antenna ya dipole yoperekedwa pakati. M'malo mokonza zinthu ziwiri zowala mu mzere wowongoka wopingasa, malo operekera chakudya amakwezedwa pamalo apamwamba kwambiri pomwe manja awiri a antena amatsika pansi kupita pansi.
Mukayang'ana kuchokera m'mbali, kapangidwe kake kamafanana ndi chilembo chozikidwa pansi "V," chomwe chimapatsa dzina la antenna. Kapangidwe kameneka kamachepetsa malo oyikamo opingasa ndipo nthawi zambiri kamafuna mzati umodzi wokha wothandizira pakati, zomwe zimapangitsa kuti ikhale yokongola polumikizirana ndi HF, kuyika malo m'munda, kuyang'anira wailesi, ndi kukhazikitsa komwe malo kapena zida zothandizira zili zochepa.
Ngakhale kuti ma antenna a V opindika nthawi zambiri amagwirizanitsidwa ndi gulu la HF la 3–30 MHz, ma frequency awo ogwirira ntchito amatsimikiziridwa ndi kutalika kwa magetsi m'malo mwa ma frequency amodzi okhazikika. Ma geometry ofananawo amatha kukulitsidwa kapena kusinthidwa pa ntchito zina za RF.
Kapangidwe ndi Mfundo Yogwirira Ntchito
Antena ya V yokhazikika yosinthidwa imakhala ndi zinthu ziwiri zoyendetsera mpweya zomwe zili ndi kutalika kofanana, zolumikizidwa ku malo oyenera oyendetsera mpweya pamwamba. Malo oyendetsera mpweya pakati amayikidwa pa chitsulo chachikulu, nsanja, chothandizira padenga, kapena kapangidwe kena kosakhala koyendetsa mpweya, pomwe malekezero a zinthu ziwirizi amatsitsidwa ndikutetezedwa ndi zotetezera mpweya.
Antena nthawi zambiri imapangidwa ngati dipole yolumikizana. Mphamvu ya RF imakhala yamphamvu kwambiri pafupi ndi malo operekera chakudya ndipo imachepa pang'onopang'ono kupita kumapeto otseguka. Zinthu ziwirizi zimakhala ndi mafunde osiyana nthawi yomweyo, zomwe zimapangitsa minda yamagetsi yomwe imaphatikizana kuti ipange mawonekedwe onse a radiation ya antena.
Mosiyana ndi antenna yoyenda ndi mafunde, dipole ya V yosinthika yosinthika imathandizira kugawa kwa mafunde oyima. Chifukwa chake, magwiridwe ake amakhudzidwa kwambiri ndi kutalika kwa zinthu, kuponderezedwa kwa malo odyetsera, ngodya ya apex, m'mimba mwake wa conductor, kutalika kwa kukhazikitsa, ndi zinthu zozungulira.
Apex Angle ndi Kukhazikitsa Geometry
Ngodya pakati pa manja awiri a antenna imatchedwa ngodya yapamwamba kapena ngodya yophatikizidwa. Makonzedwe odziwika bwino amagwiritsa ntchito ngodya ya pafupifupi 90° mpaka 120°, ngakhale kuti mtengo woyenera umadalira ma frequency omwe mukufuna, impedance, malo omwe alipo, ndi mawonekedwe a radiation omwe mukufuna.
Kuchepetsa ngodya ya pamwamba kumafupikitsa malo otsetsereka, komanso kumasintha kulumikizana pakati pa manja awiri a antenna. Pamene manja akuyandikirana, kuponderezedwa kwa malo odyetsera ndi ma frequency a resonant kumatha kusuntha, ndipo kukwera kwa pamwamba kumatha kuchepetsedwa pang'ono.
Nsonga ya pamwamba nthawi zambiri iyenera kuyikidwa pamwamba komanso yopanda zinthu zozungulira zomwe zingathandize. Palibe lamulo lapadziko lonse lonena kuti iyenera kukhala pansi pa kutalika kwa mafunde kotala. M'malo mwake, kutalika kwa kukhazikitsa kuyenera kusankhidwa malinga ndi ngodya yokwezeka yofunikira, njira yofalitsira, chithandizo chomwe chilipo, ndi momwe nthaka ilili.
Mawaya ayeneranso kukhala otetezeka pamwamba pa nthaka komanso kutali ndi anthu, nyumba, zingwe zamagetsi, ndi zinthu zachitsulo.
Kutalika kwa Mafupipafupi ndi Zinthu
Ma antenna ambiri opindika a V amapangidwa ndi kutalika konse kwa kondakitala pafupi ndi theka la kutalika kwa mafunde pa liwiro lomwe likufuna kugwiritsidwa ntchito. Mwachizolowezi, kutalika kwenikweni nthawi zambiri kumasinthidwa pang'ono chifukwa m'mimba mwake wa kondakitala, kutchinjiriza, kutalika kwa kukhazikitsa, ngodya yapamwamba, ndi zinthu zapafupi zimakhudza kuchuluka kwa ma resonant.
Kutalika kwa mafunde a free-space kumakhudzana ndi kuchuluka kwa mafunde ndi:
[\lambda = \frac{c}{f}]
komwe:
- (\lambda) ndiye kutalika kwa mafunde;
- (c) ndi liwiro la kuwala;
- (f) ndi kuchuluka kwa ntchito.
Chiyerekezochi chimapereka kuyerekezera koyambirira, koma miyeso yomaliza ya antenna nthawi zambiri iyenera kutsimikiziridwa kudzera mu kuyerekezera kwamagetsi kapena muyeso wa kutayika kobwerera ndi VSWR.
Chitsanzo cha Kuwala
Kapangidwe ka kuwala kwa antenna ya V yosinthidwa kamagwirizana ndi ka dipole yopingasa ya theka la mafunde, koma kupindika zinthuzo pansi kumasintha kugawa kwa malo amitundu itatu.
Dipole yolunjika yopingasa nthawi zambiri imapanga mbali yayikulu ya kuwala kwa waya ndipo ma nulls akuya kumapeto kwake amatuluka. Mu mawonekedwe a V osinthika, manja otsetsereka pansi amakonda kudzaza ma nulls enawa, ndikupanga azimuth yotakata komanso nthawi zambiri yofanana.
Chifukwa chake, antenna sayenera kufotokozedwa yokha ngati yolunjika mbali imodzi. Kutengera ndi ngodya ya pamwamba, kutalika pamwamba pa nthaka, mawonekedwe a nthaka, ndi kuchuluka kwa momwe imagwirira ntchito, mawonekedwe opingasa akhoza kukhala olunjika mbali zonse kapena akhoza kusunga kuwongolera pang'ono mbali imodzi.
Kutalika kwa malo oyikapo kumakhudzanso kwambiri mawonekedwe okwera. HF yotsika kwambiri yosinthidwa V ingapangitse kuwala kwamphamvu kwa ngodya yapamwamba, komwe kungakhale kothandiza pa kulumikizana kwa Near Vertical Incidence Skywave. Kukhazikitsa kwapamwamba kumatha kuthandizira ngodya zotsika zonyamuka zomwe ndizoyenera kwambiri kulumikizana kwakutali.
Kugawanika
Antena ya V yozungulira yofanana nthawi zambiri imaonedwa kuti ndi yopingasa kwambiri chifukwa zigawo zamphamvu zochokera kuzinthu ziwiri zopingasa zimalimbitsana.
Komabe, manja otsetsereka amabweretsanso zigawo zoyimirira. Kupereka kwawo kumadalira ngodya ya pamwamba, mawonekedwe a antenna, kutalika kwa kukhazikitsa, kuwunikira kwa nthaka, ndi malo ozungulira. Pachifukwa ichi, kugawanika kwenikweni mu kukhazikitsa kwenikweni sikungakhale kolunjika mbali iliyonse.
Kudyetsa ndi Kufananiza kwa Impedance
Popeza V yopindika ndi antenna yolinganizidwa bwino, ndi bwino kuidyetsa ndi chingwe cholumikizira bwino kapena kugwiritsa ntchito balun yoyenera mukailumikiza ku chingwe cha coaxial chosalinganizidwa bwino.
Balun imathandiza kuchepetsa mphamvu yamagetsi ya common-mode pamzere woperekera magetsi. Popanda kulamulira bwino mphamvu yamagetsi, chingwe cha coaxial chingakhale gawo la dongosolo lowala, kusintha kukana kwa antenna, mawonekedwe a radiation, polarization, ndi magwiridwe antchito a phokoso.
Impedance yolowera imakhudzidwa ndi:
- Ngodya ya pamwamba
- Utali ndi m'mimba mwake wa chinthucho
- Kutalika pamwamba pa nthaka
- Kuyendetsa bwino pansi
- Nyumba zapafupi
- Makonzedwe a mzere wodyetsa
- Mafupipafupi ogwirira ntchito
Pambuyo poyika, mainjiniya ayenera kuyeza kutayika kwa kubweza kapena VSWR ndikudula zinthuzo kapena kusintha netiweki yofananira ngati pakufunika kutero.
Ubwino wa Inverted V Antenna
Kapangidwe ka V kosinthidwa kamapereka zabwino zingapo zothandiza:
- Imafuna chithandizo chimodzi chokha chapakati
- Imakhala m'malo ocheperako kuposa dipole yowongoka
- Kapangidwe kosavuta komanso kotsika mtengo
- Yoyenera kuyikidwa m'manja ndi mokhazikika
- Amapereka chithunzithunzi chachikulu cha azimuth
- Ikhoza kupangidwira ntchito ya gulu limodzi kapena gulu lambiri
- Zothandiza pa kulumikizana kwa HF ndi mapulogalamu a NVIS
Zolepheretsa Kupanga
Antena ilinso ndi zofooka zingapo:
- Kusintha kwa impedance ya malo odyetsera ndi ngodya yapamwamba
- Kupeza phindu kungakhale kotsika pang'ono kuposa dipole yopingasa yokhazikika bwino
- Magwiridwe antchito amakhudzidwa ndi kutalika kwa malo oyikamo ndi momwe nthaka ilili
- Ma waya otsika angayambitse nkhawa zokhudzana ndi chitetezo ndi kutayika kwa zinthu
- Nyumba zachitsulo zapafupi zingasokoneze mawonekedwe a kuwala
- Mabaibulo a Resonant nthawi zambiri amakhala ndi bandwidth yochepa yogwirira ntchito
- Kusagwiritsa ntchito njira yolumikizirana molakwika kungayambitse ma radiation a common-mode
Mapulogalamu Odziwika
Ma antenna a V opindidwa amagwiritsidwa ntchito kwambiri mu:
- Kulankhulana kwa wailesi ya HF
- Machitidwe otumizira ndi kulandira mafunde afupi
- Masiteshoni a wailesi a okonda masewera
- Kulankhulana kwadzidzidzi ndi kumunda
- Machitidwe a Skywave Oyandikira Vertical Incidence
- Kuwunika wailesi ndi kuyang'anira sipekitiramu
- Malo olumikizirana onyamulika
- Maphunziro a ma antenna, kuyerekezera, ndi kuyesa
Kufunika kwa Uinjiniya
Antena ya V yosinthidwa ikuwonetsa momwe kusintha kochepa kwa geometry ya antena kungakhudzire impedance, polarization, gain, ndi radiation coverage.
Kumvetsetsa ubale umenewu n'kothandiza osati pakupanga mawaya ndi ma antenna okha, komanso pakupanga ndi kuwunika ma antenna a broadband, ma antenna a horn, ma antenna arrays, ma radar system, ndi ma platforms oyezera ma RF.
RF MISOimapereka mayankho a antenna ndi microwave component solutions for RF testing, communication, radar, antenna measurement, and integration system. Kumvetsetsa bwino chiphunzitso cha antenna choyambira kumathandiza mainjiniya kusankha zinthu zoyenera ndikuwunika molondola ma frequency range, gain, polarization, beamwidth, VSWR, ndi radiation-pattern performance.
Kuti mudziwe zambiri zokhudza ma antenna, chonde pitani ku:
Nthawi yotumizira: Julayi-17-2026
