Dipole yopindidwa ndi antenna yokhala ndi ma conductor awiri ofanana olumikizidwa kumapeto onse awiri, kupanga kapangidwe kozungulira kotsekedwa, komwe malo operekera chakudya ali pakati. Utali wonse wa antenna ndi theka la kutalika kwa mafunde, ndichifukwa chake imatchedwanso antenna ya dipole yopindidwa theka la mafunde.
Mafupipafupi osiyanasiyana
Antena ya dipole yopindidwa ndi theka la mafunde imagwira ntchito pa ma frequency a pafupifupi 3 kHz mpaka 300 GHz, ndipo imagwiritsidwa ntchito makamaka mu ma TV receiver.
Kapangidwe ndi Mfundo Yogwirira Ntchito ya Half-Wave Folded Dipole
Mtundu uwu wa antenna nthawi zambiri umagwiritsidwa ntchito limodzi ndi ma antenna a array kuti uwonjezere kupondereza kwa input pamalo operekera chakudya. Ntchito yodziwika bwino ndi antenna ya Yagi. Chithunzi chomwe chili pansipa chikuwonetsa antenna ya dipole yopindidwa theka-wave.
Poyerekeza ndi antenna ya dipole yachikhalidwe, antenna ya dipole yopindidwa imabweretsa kondakitala yowonjezera yofanana (monga waya wina kapena ndodo). Mwa kuyika ma kondakitala angapo ofanana mbali ndi mbali yokhala ndi insulation pakati pawo, antenna yamtundu wa array ingapangidwe.
Chithunzi chomwe chili pansipa chikuwonetsa mfundo yogwiritsira ntchito antenna ya dipole yopindidwa ndi theka la mafunde ikakhudzidwa.
Ngati kukula kwa kondakitala wamkulu kuli kofanana ndi kwa kondakitala wofanana mu dipole yopindidwa, kuletsa kwa feed-point kwa antenna kumawonjezeka ndi factor ya zinayi (sikweya ya ziwiri). Kuwonjezeka kwa kuletsa kwa feed kumeneku ndiye chifukwa chachikulu chomwe antenna yopindidwa ya dipole imagwiritsidwa ntchito kwambiri. Chifukwa cha kapangidwe kake ka twin-lead, kuletsa kwake kwachizolowezi ndi pafupifupi 300 Ω.
Mawonekedwe a radiation
Kapangidwe ka ma radiation ka dipole yopindidwa ndi theka la mafunde ndi kofanana ndi ka antenna ya dipole yopindidwa ndi theka la mafunde. Chithunzi chomwe chili pansipa chikuwonetsa kapangidwe ka ma radiation ka omnidirectional ka antenna iyi yopindidwa ndi theka la mafunde.
Antena ya dipole yopindidwa ndi theka la mafunde imagwiritsidwa ntchito m'mapulogalamu omwe mphamvu yayikulu imafunika komanso komwe kumafunika kuponderezedwa kwakukulu.
Dipole yopindidwa iyi ndiye chinthu chachikulu chomwe chimawala mu antenna ya Yagi. Chithunzi chomwe chili pansipa chikuwonetsa antenna ya Yagi (yomwe idzakambidwa mwatsatanetsatane pambuyo pake). Mu antenna iyi, malo operekera chakudya amalumikizidwa ndi dipole yopindidwa ngati gawo lofunikira. Kwa zaka makumi angapo zapitazi, antenna yamtunduwu yakhala ikugwiritsidwa ntchito kwambiri polandila wailesi yakanema.
Ubwino wa antenna ya dipole yopindidwa ndi theka la mafunde ndi awa:
1. Amalandira zizindikiro zoyenerera.
2. Imagwira zizindikiro zomwe mukufuna kuchokera ku gulu linalake la ma frequency popanda kutaya khalidwe.
3. Dipole yopindidwayo imakulitsa mphamvu ya chizindikiro.
Kuti mudziwe zambiri zokhudza ma antenna, chonde pitani ku:
Nthawi yotumizira: Juni-12-2026
