Ekusakazweni komsakazo, uyakubona lokho
I-antenna ye-FM isetshenziswa emishinini eminingi. Ingasetshenziswa iyodwa noma ihlanganiswe nezinye izimpondo ze-FM ukwakha uluhlu lwezimpondo. Kungashiwo ukuthi i-antenna ye-FM dipole ingenye yezinhlobo ezibaluleke kakhulu zothi lwe-FM. Ngakho-ke, kubaluleke kakhulu ukuba nokuqonda okuyisisekelo kwe-antenna ye-FM. Le ndatshana izokwenza isingeniso esiyisisekelo se-antenna ye-FM kusukela kwethulwa i-dipole antenna yomsakazo we-FM, umgomo wokusebenza kwe-antenna ye-dipole yomsakazo we-FM, uhlobo lwe-antenna ye-dipole, kanye nendlela yokukhetha i-antenna ye-dipole ye-FM ehamba phambili.
Amaqiniso Athakazelisayo we-FM Dipole Antenna
Emkhakheni wemisakazo nezokuxhumana, i-antenna yomsakazo we-FM iwuhlobo olusetshenziswa kakhulu nolulula kakhulu lwe-antenna ye-FM. Iningi lazo libukeka njengegama elithi "T", elakhiwe ngama-conductor amabili anobude obulinganayo futhi axhumeke ekupheleni kuya ekupheleni. Futhi axhunywe ngezintambo phakathi kwe-antenna ye-dipole. I-antenna ye-FM ingasetshenziswa yodwa noma yakhe uhlu lwezimpondo eziyinkimbinkimbi (njenge-Yagi antenna).
I-antenna yomsakazo we-FM ingasebenza ku-HF, VHF, kanye ne-UHF yebhendi yefrikhwensi. Ngokuvamile, zizohlanganiswa nezinye izinto zikagesi ukuze zakhe ingxenye ephelele. Isibonelo, i-antenna ye-dipole yomsakazo we-FM izoxhunywa nesidlulisi sokusakaza se-FM ukuze kwakhiwe umshini ophelele wokusakaza we-RF; Ngesikhathi esifanayo, njengesamukeli, ingaxhunywa nabamukelayo njengomsakazo ukuze yakhe imishini yokwamukela i-RF ephelele.
Isebenza kanjani i-FM Dipole Antenna?
Sesiyazi ukuthi igama elithi "dipole" lisho ukuthi i-antenna inezigxobo ezimbili, noma iqukethe ama-conductor amabili. I-antenna yomsakazo we-FM ingasetshenziswa njengothi oludluliselayo noma njengokwamukela uthi. Basebenza kanje:
- Ku-antenna ye-dipole edluliselayo, lapho i-antenna ye-FM ithola isignali kagesi, ukugeleza kwamanje kumakhondaktha amabili e-dipole antenna ye-FM, futhi yamanje kanye ne-voltage kuzokhiqiza amaza kagesi, okungukuthi, amasignali omsakazo futhi akhiphele ngaphandle.
- Okwe-antenna ye-dipole etholayo, lapho i-antenna ye-FM ithola lezi zimpawu zomsakazo, igagasi logesi kumqhubi we-antenna ye-FM lizokhiqiza amasignali kagesi, liwadlulisele emshinini owamukelayo futhi liwaguqule libe okukhipha umsindo.
Basebenza ngezindlela ezahlukene, izimiso zabo zifana ngokuyisisekelo, kodwa inqubo yokuguqulwa kwesignali ihlehlisiwe.
Izinhlobo ezi-4 ze-FM Dipole Antenna
Ama-antenna e-FM dipole ngokuvamile angahlukaniswa ngezinhlobo ezi-4, anezici ezihlukile.
I-antenna ye-dipole yesigamu-wave
I-antenna ye-dipole ye-half-wave iyona esetshenziswa kakhulu. Yakhiwe ngamakhondaktha amabili anobude bekota eyodwa yobude obuxhunywe ekugcineni ukuya ekugcineni. Ubude be-antenna bufushane kancane kunobude begagasi obuyingxenye kagesi esikhaleni esikhululekile. I-dipoles ye-half-wave ivamise ukuphakelwa maphakathi. Lokhu kunikeza indawo yokuphakelayo okulula ukuphatha i-impedance.
I-Multi half-wave dipole antenna
Kungenzeka futhi uma ufuna ukusebenzisa izimpondo ze-dipole zesigamu-wave (ngokuvamile ezingaphezu kuka-3, kanye nenombolo eyinqaba). Lolu hlu lwe-antenna lubizwa ngokuthi i-Multi half-wave dipole antenna. Yize imodi yayo yokukhishwa kwemisebe ihluke kakhulu kuneye-antenna ye-dipole eyisigamu-wave, isasebenza ngempumelelo. Ngokufanayo, lolu hlobo lwe-antenna luvamise ukuphakelwa maphakathi, oluphinde lunikeze ukungasebenzi kahle kokuphakelayo.
I-antenna egoqiwe
Njengoba igama liphakamisa, leli fomu le-FM dipole antenna ligoqiwe labuyela emuva. Ngenkathi isabambe ubude phakathi kwamaphethelo amabili e-wavelength ewuhhafu, isebenzisa amakhondatha engeziwe ukuze ixhume amaphethelo amabili ndawonye. I-antenna egoqiwe enjalo ye-dipole inganikeza ukuvikeleka okuphezulu kokuphakelayo kanye nomkhawulokudonsa obanzi.
I-antenna emfushane ye-dipole
I-antenna emfushane ye-dipole wuthi olubude bufushane kakhulu kunalobo begagasi elinguhhafu, futhi ubude be-antenna buyadingeka ukuthi bube ngaphansi kuka-1/10 wobude begagasi. I-antenna emfushane ye-dipole inezinzuzo zobude obufushane be-antenna kanye ne-impedance ephezulu yokuphakelayo. Kodwa ngesikhathi esifanayo, ngenxa yokumelana kwayo okuphezulu, ukusebenza kahle kwayo kuphansi kakhulu kune-antenna evamile ye-dipole, futhi amandla ayo amaningi ahlakazwa ngendlela yokushisa.
Ngokwezidingo ezahlukene zomsakazo wokusakaza, izimpondo ze-dipole ze-FM ziyazikhethela ukuhlangabezana nezidingo ezahlukene zokusakaza.
Ungayikhetha Kanjani I-FM Dipole Antenna Engcono Kakhulu?
Udinga ukucabangela lezi zici lapho ukhetha i-antenna ye-FM ukuze wakhe esakho isiteshi somsakazo.
Imvamisa Yokusebenza
Imvamisa yokusebenza ye-antenna ye-FM oyisebenzisayo kufanele ihambisane nemvamisa yokusebenza yesidlulisi somsakazo we-FM, ngaphandle kwalokho, i-antenna ye-dipole ye-FM ayikwazi ukudlulisa isignali yomsakazo ngokujwayelekile, okuzodala umonakalo emishinini yokusakaza.
Amandla athwalwa aphezulu anele
Umsakazi ngamunye womsakazo we-FM unamandla amakhulu okudlulisa. Uma i-antenna ye-FM ingakwazi ukuthwala amandla okudlulisela, uthi lwe-FM alukwazi ukusebenza ngokujwayelekile.
Inani eliphakeme kakhulu lama-VSWR
I-VSWR ikhombisa ukusebenza kahle kwe-antenna. Ngokuvamile, i-VSWR engaphansi kuka-1.5 iyamukeleka. Isilinganiso segagasi sokuma esiphezulu sizolimaza isidluliseli futhi sinyuse izindleko zokuyilungisa.
Ukuqondisa
Ama-antenna omsakazo we-FM ahlukaniswe abe izinhlobo ezimbili: i-omnidirectional kanye ne-directional. Inquma isiqondiso semisebe egxile kakhulu. I-antenna yomsakazo we-FM iyingxenye ye-omnidirectional antenna. Uma udinga i-antenna eqondisayo, udinga ukwengeza isibonisi.
Lezi izinto ezibalulekile okufanele zicatshangelwe ekukhetheni i-antenna ye-FM. Uma namanje ungaqondi, sicela usitshele izidingo zakho, futhi sizokwenzela isixazululo sochwepheshe ngokwezifiso. Sicela ukhululeke ukuxhumana nathi!
Imibuzo Evame Ukubuzwa
Ungabala kanjani ubude be-antenna ye-FM?
Amanye ama-antenna e-dipole angalungisa imvamisa yokusebenza ye-antenna ye-dipole ngokulungisa ubude bomqhubi. Ubude bomqhubi bungabalwa kusetshenziswa le fomula: L = 468 / F. L ubude bothi, ezinyaweni. F imvamisa edingekayo, ngo-MHz.
Yini okufanele ngiyinake lapho ngifaka i-FM dipole antenna?
Naka amaphuzu angu-3 lapho ufaka i-FM dipole antenna:
1. Faka i-dipole antenna yakho phezulu ngangokunokwenzeka ngaphandle kwezithiyo;
2. Ungavumeli uthi lwakho luthinte noma yini;
3. Lungisa uthi lwakho futhi uluvikele emanzini nombani.
Yiziphi izinhlobo ezahlukene zezimpondo ze-FM?
Kunezinhlobo ezine eziyinhloko zama-antenna e-FM:
- I-antenna ye-dipole yesigamu-wave
- I-Multi half-wave dipole antenna
- I-antenna egoqiwe
- idipole emfushane
Iluphi uhlobo lwesiphakeli olungcono kakhulu lwe-dipole antenna? Iyiphi indlela yokudla engcono kakhulu ye-dipole antenna?
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
Noma ubani angathenga i-dipole antenna yomsakazo we-FM futhi asungule esakhe isiteshi somsakazo. Abakudingayo imishini ethile efanele namalayisense afanelekile. Uma futhi unombono wokuqala isiteshi sakho somsakazo, ungase udinge umphakeli onokwethenjelwa ofana no-FMUSER, umphakeli ochwepheshe wezinto zokusakaza zomsakazo. Singakuhlinzeka ngamaphakheji nezixazululo zemishini yokusakaza yomsakazo esezingeni eliphezulu futhi engabizi kakhulu, futhi sikusize uqedele konke ukwakhiwa nokufakwa kwezinto zokusebenza kuze kube yilapho zonke izinto zokusebenza sezisebenza ngokujwayelekile. Uma udinga ukuthenga i-dipole antenna ye-FM bese usungula isiteshi sakho somsakazo, sicela ukhululeke ukusithinta. Sonke siyizindlebe !
