I-antenna ye-FM iwuhlobo olulula nolubanzi kakhulu lwe-antenna, ngakho-ke kulula kunoma ubani ukwenza eyakhe, edinga kuphela izinto ezithile ezilula. i-DIY I-antenna ye-FM kuyisinqumo esiwusizo futhi esingabizi kakhulu uma umsakazo wakho udinga uthi lwesikhashana. Manje-ke ungayenza kanjani i-DIY i-antenna ye-FM? Isihloko sizokutshela.
Iyini I-FM Dipole Antenna?
Kubalulekile ukuba nokuqonda okufushane kwe-antenna ye-FM ngaphambi kokuhlela ukwenza eyakho. Emkhakheni wemisakazo nezokuxhumana, i-FM dipole antenna iwuhlobo olusetshenziswa kakhulu nolulula kakhulu lwe-antenna. Inezici ezisobala: ibukeka njengegama elithi "T", elakhiwe ngama-conductor amabili anobude obulinganayo kanye nokuphela kokuphela. Izinyawo zabo zixhunywe ngentambo. Ikhebula kungaba ikhebula elivulekile, ikhebula eliphindwe kabili, noma ikhebula eliqinile. Chofoza lapha
Kufanele kuqashelwe ukuthi i-balun kufanele isetshenziswe uma kusetshenziswa intambo ye-coaxial ngoba intambo ye-coaxial iwuhlobo lwekhebula elingalingani kodwa i-antenna ye-FM dipole iwuhlobo lwe-antenna ebhalansile. Futhi i-balun ingabenza bafaniswe nomunye nomunye.
Izinto Ezilungisiwe
Udinga ukulungiselela izinto ezithile zokwenza i-dipole antenna ye-FM nayo. Ngokuvamile ziyi:
- I-Twin flex - I-Twin mains flex ilungile, kodwa ungakwazi esikhundleni sayo ufake ezinye izintambo, njengezintambo zesipika ezindala, inqobo nje uma ukumelana kwazo kusondele kuma-ohms angu-75.
- Ukugoqa - Kusetshenziselwa ukuvikela isikhungo se-dipole antenna ye-FM nokuvimbela ukuguquguquka ekuvulekeni okungaphezu kwalokho okudingekayo.
- Intambo noma i-twine - Isetshenziselwa ukuvikela iziphetho ze-antenna ye-FM ifike endaweni ethile (uma kudingeka).
- Izixhumi - Isetshenziselwa ukuxhuma uthi lwe-FM nentambo ye-coaxial.
Lezi zinto zingatholakala empilweni yakho yansuku zonke. Ungasebenzisa nalezo ezitholakala enqwabeni yemfucuza ukwenza i-VHF I-antenna yomsakazo we-FM.
Bala Ubude Be-antenna
Bese kudingeka ukubala ubude be-antenna yakho ye-VHF FM. Ungakwazi ukubala ngokwale fomula:
L=468/F : L ibhekisela kubude be-antenna, ngakho ubude be-conductor budinga ukuhlukaniswa ngo-2. F imvamisa yokusebenza ku-MHz. Uma lezi ezingenhla sezilungile, ungaqala ukwenza izinti.
Izinyathelo ezi-4 ze-DIY FM Dipole Antenna
Kulula ukwenza i-antenna ejwayelekile ye-VHF FM, edinga izinyathelo ezi-4 kuphela ezilula. Landela isiqondiso esingezansi!
- Hlukanisa ikhebula - Hlukanisa izintambo ezimbili ezivaleleke zekhebula.
- Lungisa indawo emaphakathi - Khumbula ubude bomqhubi wakho? Ake sicabange ukuthi ingamasentimitha angama-75. Uma i-conductor ingu-75 cm ubude ngokwanele, iyayeka ukuhlukanisa izintambo. Bese ubopha phakathi ne-tie wrap ngalesi sikhathi. Futhi lesi yisikhungo se-antenna ye-FM.
- Lungisa ubude bomqhubi - Khona-ke ungakwazi ukulungisa ubude bomqhubi kancane. Ngenxa yokuthi kunezici eziningi ezithinta ukungaguquki kufomula yobude bomqhubi, akunakwenzeka ukuba nembe nganoma yisiphi isikhathi. Uma udinga imvamisa yokusebenza ephezulu, unganciphisa ubude bomqhubi kancane.
- Lungisa uthi - Ekugcineni, bopha ifindo ekugcineni kocingo ukuze ukwazi ukulungisa uthi ngezinye izintambo ezisontekile. Lapho ufaka i-antenna ye-FM, qaphela ukuthi ungahlali ezintweni zensimbi, noma ikhwalithi yokwamukela isignali izoncipha.
Isamukeli se-VHF FM singasetshenziselwa isixhumi esibonakalayo esingu-75-ohm kanye nesixhumi esibonakalayo esingu-300-ohm. I-antenna ye-FM engenhla ifanele isixhumi esibonakalayo esingu-75-ohm. Uma ufuna ukusebenzisa isixhumi esibonakalayo esingu-300-ohm, ungazama izindlela ezimbili:
- Xhuma i-antenna yakho ye-DIY 75-ohm dipole ngentambo ye-coaxial nge-balun
- Thenga ikhebula le-300 ohm FM ku-inthanethi futhi wenze i-dipole antenna engu-300-ohm ngendlela efanayo nokwenza i-dipole antenna engu-75-ohm.
Kuyaphawuleka ukuthi kunconywa kuphela ukusebenzisa i-DIY FM dipole antenna emsakazweni wakho noma umamukeli womsindo. Uma udinga uthi lokuthumela umsakazo we-FM, sicela uthenge uthi lwe-dipole lwe-FM oluchwepheshile kumnikezeli wempahla yomsakazo oqeqeshiwe, njenge-FMUSER.
Imibuzo Evame Ukubuzwa
Iyini I-Balun Ye-Dipole?
Umgomo kaBaron ufana nowe-transformer. I-balun iyisisetshenziswa sikagesi esishintsha phakathi kwesignali ebhalansi nesignali engalingani, noma ulayini wokuphakelayo.
Kufanele Ngisebenzise Nini I-Antenna Balun?
Ibhalansi isetshenziswa ezindaweni eziningi ukuze kuguquke phakathi kwezimo ezilinganiselayo nezingalingani: indawo eyodwa eyinhloko ingeyefrikhwensi yomsakazo, izinhlelo ze-RF zezimpondo. Izilinganiso ze-RF zisetshenziswa nezimpondo eziningi kanye neziphakeli zazo ukuguqula okuphakelayo okunebhalansi noma umugqa ube ongalingani, Njengoba i-dipole antenna iyi-antenna ebhalansile futhi intambo ye-coaxial iyikhebula elingalingani, intambo ye-coaxial idinga ukusebenzisa i-balun ukushintsha i-coaxial. ikhebula ibe ikhebula elilinganiselwe.
Yiziphi Izinhlobo Ezihlukile Ze-FM Dipole Antennas?
Kunezinhlobo ezine eziyinhloko zama-antenna e-FM:
- I-antenna ye-dipole yesigamu-wave
- I-Multi half-wave dipole antenna
- I-antenna egoqiwe
- idipole emfushane
I-antenna ye-dipole iyi-antenna elinganiselayo, ngakho-ke kufanele usebenzise okondla okulinganiselwe, okuyiqiniso ngombono. Kodwa-ke, okuphakelayo okunebhalansi akuvamile ukusetshenziswa ngoba kunzima ukusebenza ezakhiweni futhi kusebenza kuphela ebhendini ye-HF. Kusetshenziswa izintambo eziningi ezingama-coaxial ezine-balun.
Isiphetho
I-FM dipole antenna isetshenziswa kakhulu ezimeni ezahlukene zokusakaza emsakazweni, njengomsakazo womuntu siqu we-FM ngenxa yobulula bawo, ukusebenza kahle kwawo, kanye nezindleko eziphansi. Kodwa uma udinga ukwakha isiteshi somsakazo, ukuthola umhlinzeki wezinto zomsakazo onokwethenjelwa kuseyisinqumo sakho esingcono kakhulu. I-FMSUER ingumphakeli ochwepheshile nonokwethenjelwa wemishini nezixazululo zomsakazo we-FM, okuhlanganisa ama-transmitter omsakazo we-FM asebenzayo futhi angabizi kakhulu athengiswayo, ama-dipole antenna e-FM athengiswayo, nokunye. Uma ufuna lezi, sicela ukhululeke ukuxhumana nathi!
