I-FMUSER 50Ω Iyunithi Yokushuna I-Antenna yesimo esiqinile engu-530-1,700 kHz AM Isiteshi Sokudlulisa Amagagasi Esimaphakathi

Buka Quick

1. I-Tech Spec ye-FMUSER Antenna Tuning Unit
2. Izici eziyinhloko ze-FMUSER Antenna Tuning Unit
3. Ungathenga kuphi Iyunithi yokushuna ye-AM ehamba phambili?
4. Iyunithi yokushuna i-Antenna: Iyini futhi Isebenza Kanjani?
5. Siyini Isakhiwo Esiyisisekelo Seyunithi Yokushuna I-Antenna
6. Kungani i-ATU Ibalulekile Ekusakazweni Kwegagasi Elimaphakathi?

 

I-Tech Spec ye-FMUSER Antenna Tuning Unit

 

Imigomo	Spec
Ukusebenza imvamisa	531-1700 kHz i-wave medium (MW) ibhendi egcwele
I-Transmitter Max. Amandla Okufaka	1KW/5KW/50KW (ngokuya ngesidingo sakho)
I-passband yomkhawulokudonsa	25 kHz-30 kHz (umkhawulokudonsa wamandla ayingxenye)
Umkhawulokudonsa webhande lenguquko	30 kHz-80 kHz
I-Stopband bandwidth	≥100 kHz
Isilinganiso segagasi lokuma kwe-antenna	ngaphakathi ±5 kHz≤1.05, ngaphakathi ±10 kHz≤1.3
Ukuvinjwa kwebhande lokumisa	Uma i-frequency ingu-100 kHz kude nefrikhwensi emaphakathi, ukuncipha kungu-25 dB.
Ukuvikelwa kombani	amandla asele ombani angaphansi kwama-200 mJ

 

Cela ikhotheshini

 

Izici eziyinhloko ze-FMUSER Antenna Tuning Unit

• Iyunithi yokushuna i-antenna ingasetshenziswa kufrikhwensi eyodwa yombhoshongo, imvamisa ekabili, kanye nemvamisa emithathu, kanye namagagasi aphakathi nendawo wamazinga ahlukene wamandla.
• Ubuchwepheshe obukhethekile bokuvikela ukuhlukaniswa kombani we-electromagnetic coupling isolation, ngaphezu kokuvikela umbani wendabuko we-inductance, ukuvikelwa kombani wokuhlukaniswa kwe-capacitive, nokuvikelwa kombani okuyindilinga kazibuthe, isigaba sokugcina senethiwekhi futhi sengeza ukuvikelwa kombani wokuhlukaniswa kombani we-electromagnetic coupling, ngoba akunjalo. idivayisi yendabuko Ukwenziwa kothintana naye ngqo kanye nezici ezinembile zokukhetha imvamisa kwenza kungenzeki ukuthi amandla ombani adluliselwe ngokuqondile kusidlulisi ngenethiwekhi yothi. Idizayini yalolu chungechunge lwemikhiqizo yenethiwekhi yamukela inhlanganisela yomklamo wenethiwekhi yendabuko kanye nobuchwepheshe bokuhlukaniswa bokuzibuthe kwe-electromagnetic, okuhlanganisa uhlobo lwendabuko lwe-L, umklamo wohlobo lwe-π, kanye nedizayini yendabuko yokuvikela umbani, kanye nokuhlukaniswa okusha kokuhlangana kwe-electromagnetic. Kusukela ngo-2014, ibisetshenziswa kabanzi ezinhlelweni zokusebenza futhi yamukelwe kahle ngabasebenzisi. Kuze kube manje, akukaze kube khona ukwehluleka komthumeli okubangelwa umbani, noma ukwehluleka kwenethiwekhi ye-air conditioning eyodwa.
• Ngokusebenzisa isilawuli se-chip eyodwa, inani lesinyathelo sokulungiswa kwe-inductance lingaba ngu-0.1uH, futhi ukunemba kokulungisa kuphezulu.
• Ukudluliswa okungenantambo, kanye "nebhokisi lokulawula" kanye "nebhokisi lokulungisa" aklanyelwe ngokuvikela umbani ukukhulisa ukuthembeka kokulawula.
• Ububanzi obulungisekayo bekhoyili buseduze no-10uH, futhi ububanzi bokumatanisa nokukhipha nabo bubanzi kakhulu (i-VSWR ehloliwe phakathi kwe-1.5 ingamataniswa kahle no-50Ω).
• Njengoba ifakwe ukuzivikela ngokweqile, asikho isidingo sokukhathazeka ngokulimala kwekhoyili okubangelwa ukungasebenzi kahle.

  

U-FMUSER: Umkhiqizi Ongcono Kakhulu we-AM Antenna Tuning Unit evela e-China

 

 

I-FMUSER ingomunye wabakhiqizi abakhulu nabahlinzeki bemishini yokusakaza ye-AM e-China. Sihlinzeka ngemishini yokusakaza ye-AM (LW/SW/MW) echwepheshile kanye nezixazululo eziphelele ze-turnkey yeziteshi zokusakaza ze-AM, okuhlanganisa ukuthengiswa kwamagagasi aphakathi nendawo, iyunithi yokushuna i-antenna engu-50Ω MW (amandla okokufaka ancike emandleni akho esidluliseli se-AM), kanye nezimbalwa ezimbalwa eziphakeme- ikhwalithi ye-AM yokusakaza izimpondo, imithwalo ye-dummy nezinye izinto zokusebenza ezisebenzayo. 

 

Buka uchungechunge lwethu lwamavidiyo okwakhiwa kwe-10kW AM esizeni e-Cabanatuan, e-Philippines:

 

 

Singahlinzeka ngezakhiwo ezenziwe ngokwezifiso zamayunithi afanayo we-antenna enamandla amakhulu. Lezi zakhiwo zisebenzisa isistimu yokufaka esheshayo, engaqedwa ngokuphelele ukuze kuthuthwe iziqukathi. Afakwe igwebu, aqukethe isivikelo se-RF, angahlonywa ngohlelo lukagesi oluphelele oluhlangabezana nanoma yiziphi izindinganiso zasendaweni, futhi lungahlanganisa amasistimu okushisa/afaka umoya.

 

Ukusetshenziswa kwalezi zakhiwo kunciphisa kakhulu isikhathi sokusebenza endaweni. Isakhiwo safakwa futhi savivinywa efekthri ye-FMUSER futhi imojuli yesistimu yokushuna kwezinti yafakwa. Bese, yonke iyunithi yokushuna i-antenna imakwa futhi irekhodwe ukuze ihlanganiswe ngokushesha endaweni yekhasimende ngaphambi kokuthunyelwa kweziqukathi.

 

Ungahlinzeka ngezinsiza ezahlukahlukene nezinketho zeyunithi yethu yokufanisa izinti, noma uthuthukise noma ulungise isistimu yakho ekhona. Lokhu kufaka phakathi ama-mica nama-vacuum capacitor, izingxenye zamandla aphezulu, ama-inductors namakhoyili e-RF, ama-ammeter e-RF, izivikeli zombhoshongo, iziguquli zokukhanyisa, ukuklinywa kokukhanyisa, namakhabethe.

 

Amasevisi ajwayelekile anikeziwe:

 

• Ukuhlolwa Kwesizinda Nokuphenya
• I-Antenna kanye ne-Rf System Design
• Ukuphatha iphrojekthi
• Ukugadwa kokufakwa
• Ukuxazulula Izinkinga Nokunakekela
• Ukuhlolwa Kwesondlo
• Ukuhlolwa Kwesistimu ye-Antenna
• I-Electromagnetic Hazard Test

 

Cela ikhotheshini namuhla futhi sikuvumele sikusize wakhe isiteshi sakho somsakazo se-AM!

 

Xhumana nathi Namuhla

Imikhiqizo Enconyiwe Futhi Ongase Ube Nentshisekelo Kuyo

 

I-High Power Solid-state AM Transmitters Afinyelela ku-200 kW
1KW AM Transmitter	3KW AM Transmitter	5KW AM Transmitter	10KW AM Transmitter
25KW AM Transmitter	50KW AM Transmitter	100KW AM Transmitter	200KW AM Transmitter

 

I-AM Tower Antenna Test Ilayisha Imithwalo
1, 3, 10KW AM ukuhlolwa komthwalo	100KW AM Umthwalo wokuhlola isidlulisi	200KW AM Umthwalo wokuhlola isidlulisi

 

Cela Ukucaphuna

 

Iyunithi yokushuna i-Antenna ye-Medium Wave AM: Iyini futhi Isebenza Kanjani?

 

Igagasi elimaphakathi iyunithi yokushuna i-antenna (ATU) isho ucezu lwemishini yokuhlanganisa phakathi kwesidlulisi sokusakaza se-AM kanye ne-antenna yokusakaza ye-AM.

 

Isithwali esikhiqizwe isidluliseli sokusakaza se-AM sidluliselwa ku-antenna nge-coax feeder, futhi i-antenna ikhipha amagagasi kagesi.

 

Iyunithi yokushuna i-antenna nayo ibizwa ngokuthi:

 

• Ishuna ye-antenna
• Ishuna ye-antenna ezenzakalelayo
• Ukushuna kwe-antenna
• Ukulinganisa kwe-antenna
• Ishuna ye-Ant
• I-Antenna ATU
• Isifanisi se-antenna
• Iyunithi yokufanisa i-antenna
• Iyunithi yokushuna i-antenna
• Iyunithi ye-antenna
• I-antenna ye-ATU
• Ishuna ye-antenna ye-ATU
• Ishuna ye-antenna ezenzakalelayo
• Iyunithi yokushuna i-antenna ye-AM
• Inethiwekhi yokufanisa i-antenna
• Iyunithi yokushuna i-antenna ye-ATU

 

Idizayini Yeyunithi Yokushuna I-Antenna: Ichazwe ngu-FMUSER 

 

Ishuna ye-antenna ezenzakalelayo ibhuloho elixhuma i-coax feeder, i-transmitter, kanye ne-antenna, ngokulungisa amapharamitha wokudlulisela, iyunithi yokushuna i-antenna iyakwazi ukufeza ngaphandle komthungo ukuvimbela okufanayo phakathi kokuphela kokufaka kwe-antenna kanye nesiphakeli futhi kunxeshezelwe. ukusabela kothi oludlulisayo.

 

 

Eqinisweni, ohlelweni lokuphakelayo kwe-antenna, i-antenna kanye ne-feeder kuyizinhlelo ezimbili.

 

Ngenxa yezici ezihlukene zokuvimba, ingxenye yamandla kazibuthe iboniswa emuva ukuze yakhe igagasi elimile emugqeni. Isilinganiso se-voltage peak to the trough voltage of the stand wave sibizwa ngokuthi i-voltage stand wave ratio.

 

Uma isilinganiso segagasi esimile silingana no-1, kusho ukuthi uthi kanye nesiphakeli kufanelana ngokuphelele, futhi amandla amaza aphezulu omthumeli wonke akhishwa uthi. Izinga lokumatanisa phakathi kwe-antenna nesiphakeli likalwa nge-coefficient yokubonisa noma isilinganiso segagasi sokuma sokufakwayo kwe-antenna.

 

Ku-antenna yokudlulisela, uma ukulungiswa kwe-antenna kungalungile, amandla akhazimulayo we-antenna azokwehla, ukulahleka kwesiphakeli kuzokhula, namandla wamandla ophakeli nawo azokwehla.

 

Isilinganiso se-voltage yesignali kumthamo wesiginali ekufakweni kwe-antenna kubizwa ngokuthi i-impedance yokufaka ye-antenna. I-impedance yokufaka inengxenye engu-R ephikisayo kanye nengxenye esebenzayo engu-X, okungukuthi, i-impedance Z=R+JX.

 

Ukuba khona kwengxenye esebenzayo kuzonciphisa ukukhishwa kwamandla esignali kusuka ku-antenna kusuka kusiphakeli. Ngakho-ke, ingxenye esebenzayo kufanele yenziwe ibe nguziro ngangokunokwenzeka, okungukuthi, i-impedance yokufaka ye-antenna kufanele yenziwe ukumelana okumsulwa ngangokunokwenzeka.

 

Ngakho-ke, iyunithi yokufanisa uthi yengezwa phakathi kwe-antenna nesiphakeli.

 

Ufuna imishini eyengeziwe yokwakha uhlelo oluphelele lwe-antenna esiteshini sakho sokusakaza? Hlola lezi!

 

Izixhumi ze-Coax	Umugqa Oqinile Nezingxenye	Izihlungi ze-RF Cavity	Ama-Transmitter Combiners
RF Dummy Imithwalo	Lightning Protection	Izimpondo ze-FM	Ukudluliselwa kwe-FM
Ama-AM Transmitters	AM Antenna	Ama-TV Transmitters	Izimpondo ze-TV

 

Uma isici se-impedance sesiphakeli singama-50 Ω, ngokulungisa ukuthinta kwe-antenna, ingxenye ecatshangwayo ye-impedance yokufaka incane futhi ingxenye yangempela iseduze no-50 Ω ngaphakathi kwebanga lefrikhwensi yokusebenza edingekayo ukuze ukuvimbela okokufaka kothi. Z=R=50 Ω, nokumadanisa okuhle phakathi kwe-antenna nesiphakeli kufinyelelwa. Ekuhloleni kwangempela, ngokuvamile sisebenzisa i-vector network analyzer ukuze silinganise ukuvinjelwa.

 

 

Inhloso yokusetha iyunithi yokufanisa i-antenna ukunciphisa isilinganiso samagagasi okuma, ukunciphisa amandla abonisiwe, ukuthuthukisa ukusebenza kahle kokudlulisela, noma ukuthuthukisa ukusebenza kahle kokudlulisela.

 

Ukulungisa iyunithi yokushuna i-antenna ye-AM, ngakolunye uhlangothi, uthi lwe-antenna kufanele lube sesimweni sokukhala, futhi ngakolunye uhlangothi, ukuthikamezeka kothi kufanele kuhambisane nesiphakeli sokudlulisa ngemva kokuguqulwa inethiwekhi efanayo.

 

Vele, ngisho nothi oluklanywe kahle futhi olushuniwe luzohlala lunenani elincane lengxenye esebenzayo ku-impedance yalo yokufaka.

 

Ama-Antenna e-AM Transmitter anconyiwe eyunithi yokushuna i-Antenna

 

I-FMUSER Shortwave (SW) Antenna Solutions Vakashela ukuze uthole okwengeziwe
I-Omin-quadrant SW Ant	SW Intuthwane Eyondliwe Kaningi	Intuthwane Eshintshashintshayo ye-SW
I-SW Rotatable Curtain Arrays	I-SW Curtain Arrays HRS 8/4/H	I-SW Cage Antenna
I-SW Curtain Arrays HRS 4/4/H	I-SW Curtain Arrays HRS 4/2/H	I-SW Curtain Arrays HR 2/1/H
	Izixazululo ze-antenna ye-FMUSER shortwave - Vakashela ukuze uthole okwengeziwe
I-SW Curtain Arrays HR 2/2/H

 

Xhumana Nochwepheshe bethu

 

I-FMUSER Medium Wave (MW) Antenna Solutions Vakashela ukuze uthole okwengeziwe
Ithola i-Omni MW Ant	I-MW Shunt Fed Ant	I-Directional MW Ant

 

Cela Ukucaphuna

 

Kungani Iyunithi Yokushuna Kwe-Antenna Ibalulekile Ekusakazweni Kwegagasi Elimaphakathi?

 

Ngokuvamile, isiteshi se-medium wave transmitter siqukethe le mishini yokudlulisa ejwayelekile elandelayo:

 

• Ishubhu ye-brass hard feed
• Okuphakelayo okuhlukahlukene nezixhumi
• i-medium wave transmitter
• Umbhoshongo we-antenna yamagagasi amaphakathi
• I-MW Antenna Dummy Load
• Iyunithi yokufanisa i-antenna

 

Phakathi kwazo, imisebenzi eyinhloko yeyunithi yokulungisa i-antenna yile:

 

1. Ukucindezelwa kwempendulo yemvamisa ephezulu
2. Ukulingiswa kokulinganisa
3. Ukuvikelwa kombani

 

Imishini esegumbini lokuhambisa ihlanganisa amapayipi okuphakelayo aqinile, iziphakeli nezixhumi ezihlukahlukene, namagagasi aphakathi nendawo, kuyilapho umbhoshongo we-antenna ephakathi nendawo kanye neyunithi yokushuna i-antenna ye-AM ngokuvamile kufakwa ngaphandle (uhlelo lwenethiwekhi yokulungisa i-antenna lungabuye lufakwe ngaphakathi. i-wave transmitter).

 

I-Antenna Tuning Unit Izalelwe Izimo Ezishintshayo Zokudluliswa kwe-MW

 

Ngenxa yezimo zemvelo ezizinzile, ukugcinwa kwezinto ezisetshenziswa endlini kulula ukukufeza, kuyilapho ukugcinwa kwemishini yangaphandle yamagagasi aphakathi nendawo kuba nzima kakhulu, ikakhulukazi ukufakwa kanye nokugunyazwa kwezimpondo ezimaphakathi namaza okushuna amayunithi e-ATU - kusukela kulo msebenzi Iningi lazo lenziwa endaweni engaphandle, ngakho-ke indawo yokusebenza izoba mbi kakhulu futhi isici sobunzima bokulungisa sizoba phezulu kakhulu.

 

Ngaphezu kwalokho, ngokuthuthukiswa kwedolobha, inethiwekhi ye-antenna ibhujiswa kalula, indawo ezungezile ye-electromagnetic isiye yaba yinkimbinkimbi kakhulu, futhi inani lama-transmitter ngenxa yokwehluleka kwe-antenna kanye ne-feeder nalo liye landa. Ukuvama kwamanethiwekhi okususa iphutha sekuvame kakhulu kunangaphambili.

 

I-Antenna Tuning Unit iyinethiwekhi Yokugcina Yesiteshi Sokudlulisa

 

Kuhle ukusho ukuthi i-impedance yokufaka ye-antenna ivame ukuhlotshaniswa nesakhiwo sayo sejometri kanye nemvamisa yamaza omsakazo angenayo. Lapha, isethi yamayunithi wokushuna we-antenna afana nokubambezeleka kokufaka kwe-antenna kanye nokuphazamiseka kwesici kwesiphakeli kuyadingeka ukuze kunikwe amandla okukhiphayo komthumeli. Amandla efrikhwensi ephezulu angalethwa othingo ngokujwayelekile.

 

Ngasikhathi sinye, njengenethiwekhi yokugcina yohlelo lokudlulisela, iyunithi yokulungisa i-antenna ye-ATU ayihlobene kuphela nokuthi isidlulisi singavulwa ngokujwayelekile yini, kodwa futhi nekhwalithi nokuphepha kwesiginali edluliswa ngumthumeli. Uma sekunzima ukulungisa iphutha kuzokwenza ukuthi umsakazo ume isikhathi eside. ukusakaza (futhi eqinisweni, lokhu kuvame ukwenzeka), okuzolimaza ngendlela engenakulungiseka imali engenayo yesiteshi somsakazo.

 

Ukugcinwa Okuhle Kweyunithi Yokushuna Kwe-Antenna Kubalulekile

 

Ukufakwa okubushelelezi, ukulungisa amaphutha, nokuvikela uhlelo lwenethiwekhi ye-antenna kubaluleke kakhulu esiteshini sokuqalisa ngasinye.

 

Ngenxa yezimo ezihlukene zenhloso, igumbi lesidlulisi samagagasi amaphakathi emazweni/ezifundeni eziningi alikwazi ukwakha igumbi lokufanisa, futhi lingasebenzisa ibhokisi lokufanisa kuphela. Izidingo ezijwayelekile zokufakwa kwebhokisi elifanayo yilezi:

         

• Usayizi webhokisi kufanele ulungele indawo ezofakwa.
• Lapho ulungisa isikhala sangaphakathi sebhokisi, cabangela usayizi we-inductor edingekayo futhi uvumele ukuthi ifakwe.
• Ngenxa yomsebenzi wesikhathi eside wangaphandle, kuyadingeka ukucabangela ukuthi impahla yebhokisi kufanele ingangeni manzi, ingashi, ingagqwali, ingangeni uthuli, futhi iqine.
• Isisindo esiphelele sebhokisi kufanele silungele ukufakwa futhi sicabangele ukuthwala umthwalo we-pole.
• Umnyango webhokisi kufanele ukhipheke ngokusemandleni akho ukuze ulinganiswe futhi ulungiswe, futhi umnyango webhokisi ungavulwa kukho kokubili ngaphambili nangemuva uma izimo zivuma.

 

Kodwa-ke, ukusetshenziswa kwamabhokisi afanayo kuzokhawulela kakhulu inani lezingxenye okufanele zibekwe. Azikho izingxenye eziningi kanye nesikhala sokubeka esilinganiselwe, futhi imingcele yokusabalalisa iyinkimbinkimbi, okwandisa ubunzima bokufaka, ukulungisa iphutha, nokugcinwa.

 

Imikhiqizo Enconyiwe Futhi Ongase Ube Nentshisekelo Kuyo

Kuze kube ngu-1000 Watts Izidluliseli zamandla aphansi FM	Kuze kube ngu-10000 Watts Ama-transmitter anamandla e-FM aphezulu	Ama-transmitters, izimpondo, izintambo Amaphakheji omsakazo we-FM
Isiteshi somsakazo, isiteshi somsakazo Imishini Yesiteshi Somsakazo	I-STL TX, i-RX, ne-antenna Izixhumanisi ze-STL	Amaphakheji we-antenna ye-FM ayi-1 kuye kwayi-8 Uhlelo lwe-FM Antenna

 

Iyunithi yokushuna i-Antenna: Ingcono Isixazululo Okokushuna kwe-Antenna Yendabuko

 

Inethiwekhi yokukhipha umshini yama-transmitters endabuko ayikwazi ukuhlangabezana nezidingo zansuku zonke

 

Ngokuthuthuka okusheshayo kobuchwepheshe embonini yezokusakaza, i-medium wave transmitter isebenzise kancane kancane ubuchwepheshe obunye besimanje, obungagcini nje ngokuhlangabezana nezidingo zokusebenza zesithumeli kodwa futhi kuthuthukisa kakhulu ukusebenza kahle komsebenzi. Njengomkhiqizo wenkathi entsha, i-All-solid-state medium wave transmitter inezinzuzo zokuvikela imvelo kanye nokusetshenziswa okuphansi kwamandla.

 

Njengamanje, i-medium wave stream transmitter isetshenziswa kakhulu embonini yokusakaza ye-TV. Kunciphisa kakhulu izindleko zokunakekelwa nokuvikela isidlulisi futhi kunciphisa ukusetshenziswa kwezinsiza kanye nomsebenzi wabasebenzi abahlobene. umthwalo.

 

Kufanele kushiwo ukuthi impumelelo enkulu kubuchwepheshe bokudluliswa kwamagagasi aphakathi ucwaningo kanye nokusetshenziswa kwamagagasi okusakaza amagagasi aphakathi nendawo afinyelela ku-10kw. Uma kuqhathaniswa ne-medium wave transmitter yangaphambilini, ukusebenza kahle kwedivayisi kuye kwathuthukiswa kakhulu futhi ukulungiswa kulula kakhulu, okuqinisekisa ukusebenza kahle kwalo lonke uhlelo.

 

Ukulungiswa kohlangothi lwe-transmitter okuvamile kusebenzisa inethiwekhi yokuphumayo yomshini ukufanisa inethiwekhi ye-antenna esusiwe, okungagcini nje ngokukhuphula ukulahlekelwa kokudlulisela kodwa futhi okungeke kuqinisekise ukusebenza okuvamile komshini.

 

Yize isidlulisi segagasi esiphakathi nendawo esikhona manje samukela ukwakheka kwesekethe enembile, izidingo zendawo yokusebenza ziyathuthukiswa, namandla okuzivikela kanye nokuqapha kwesidlulisi ayathuthukiswa. Ngoshintsho oluncane, isidlulisi sizovamise ukuwisa amandla noma sivale ngokuzenzakalelayo.

 

Idizayini Engaphelele Ye-Medium Wave Transmitter

 

Ngaphezu kwalokho, ngenxa yokuthi amandla okumelana nokuphazamiseka kanye nokumelana ne-voltage ephansi ye-metal oxide semiconductor field effect transistor esetshenziswa ku-All-solid-state medium wave transmitter akukuhle ngokwanele, nakanjani kuzoba nomthelela omubi kunethiwekhi ye-antenna ngesikhathi sokusebenza. .

 

Ukuthi i-transmitter ingadlulisa ngokuzinzile nangokuthembekile futhi izuze amandla aphezulu okudlulisela kuthintwa kakhulu ukwakheka kweyunithi yokushuna kwezinti.

 

Ukuvela kwenethiwekhi eguquguqukayo kushintshe uhlelo lwendabuko lwe-antenna-feeder oluhambisanayo kanye nokuhlehlisa ekugcineni komthumeli. Uma i-antenna impedance ishintsha ngezinga lokushisa noma umswakama, ukuthikamezeka okokufaka kwenethiwekhi yokulungisa uthi kuyasuka ku-50Ω. Ngokulungisa inethiwekhi eguquguqukayo, I-impedance yeyunithi yokushuna kwezinti iphinde ifaniswe no-50Ω, ukuze kuqinisekiswe ukuthi isidlulisi sifinyelela umphumela wokudlulisela ongcono kakhulu.

 

Njengoba inethiwekhi eguquguqukayo ingukulungiswa okungathinteki, ukulungiswa akuthinti ukusakazwa okuvamile komthumeli, futhi akukho mkhuba wokuthi ukulungiswa kunzima noma akunakwenzeka ukulungisa ngemva kwezikhathi ezimbalwa zokulungiswa.

 

Siyini Isakhiwo Esiyisisekelo Seyunithi Yokushuna I-Antenna

 

Iyunithi yokushuna i-antenna ikakhulukazi yakhiwe inethiwekhi efanayo, inethiwekhi evinjiwe, inethiwekhi yokumuncwa, inethiwekhi esethiwe, uhlelo lokuvikela umbani, nezinye izingxenye.

 

Ezisetshenziswa ezingokoqobo, ngenxa yokuthi i-antenna yamagagasi aphakathi nendawo iphakeme kakhulu, ithintwa kalula umbani nemvelo kazibuthe. Ukuze kuqinisekiswe ukuphepha nokusebenza okujwayelekile kwesidlulisi, abanye abahlinzeki benethiwekhi ye-antenna bazobeka amabhola okukhipha i-graphite emnyango we-antenna ukuze akhishwe. Noma engeza inethiwekhi evimbelayo kanye nesistimu yokuvikela umbani kunethiwekhi efanayo.

 

Ukufanisa Inethiwekhi ye I-Antenna ATU

 

Ukubaluleka kokuba khona kwenethiwekhi efanayo ukwenza isidlulisi sokusakazwa kwegagasi elimaphakathi nesimo sonke esiqinile kanye nokumelana nesici sokuphakelayo kuxhumeke eduze ukuze ikwazi ukuthola izilungiselelo zenethiwekhi esimweni esifanayo. Inethiwekhi efanayo ayinawo umthelela ekusebenzeni kahle kwesidlulisi sokusakaza segagasi elimaphakathi lesifunda sonke. umphumela olinganiselwe.

 

Iyunithi yokufanisa i-antenna iyinethiwekhi esethelwe ukuxhumana okungenamthungo phakathi kwesidlulisi se-medium wave transmitter kanye nokumelana nesici se-feed, futhi inethiwekhi isethwe esimweni esifanayo ukuze wonke umthumeli wesidluliseli esimaphakathi sibe ku- isimo sokusebenza esihle.

 

Inhloso yokwengeza inethiwekhi efanayo ohlelweni lwe-antenna feeder ukwenza ukuthikamezeka kwe-antenna kanye nokuvinjwa kwesiphakeli kulingane noma kufane. Kunezinhlobo ezintathu zenethiwekhi ehambisanayo: umumo ongu-Γ, umumo we-T, kanye nomumo ongu-Π, lapho umumo ongu-Γ uhlukaniswe waba umumo ongu-Γ omuhle kanye nomumo ongu-Γ ohlanekezelwe.

 

Inethiwekhi emise okwe-Γ ilula uma kuqhathaniswa, inezingxenye ezimbili kuphela (amaqembu amabili), i-inductor, kanye ne-capacitor. Ngokombono, inethiwekhi emise okwe-Γ ingafanisa nanoma yikuphi ukuvimbela nokuvimbela esikudingayo. Inethiwekhi emise okwe-Π iqukethe izingxenye ezintathu, futhi i-inductance noma amandla engalo yochungechunge kuthathwa njengoxhumano lochungechunge lwama-inductance amabili noma ama-capacitor, lapho-ke inethiwekhi emise okwe-Π ingathathwa njengoxhumano lochungechunge lwe-Γ ehlanekezelwe kanye inethiwekhi enhle ye-Γ. Ngokuklama okujwayelekile, kuyadingeka ukukhetha ifomu elinesakhiwo esilula ngangokunokwenzeka ukuze kube lula ukulungisa iphutha. Lapho okokufaka kwe-antenna kungu-R I-Z0 (i-feeder impedance), ukwakheka kuka-Γ okuhlanekezelwe kuyakhethwa.

 

Inethiwekhi emise okwe-Γ ilula uma kuqhathaniswa, inezingxenye ezimbili kuphela (amaqembu amabili), i-inductor, kanye ne-capacitor. Ngokombono, inethiwekhi emise okwe-Γ ingafanisa nanoma yikuphi ukuvimbela nokuvimbela esikudingayo. Inethiwekhi emise okwe-Π iqukethe izingxenye ezintathu, futhi i-inductance noma amandla engalo yochungechunge kuthathwa njengoxhumano lochungechunge lwama-inductance amabili noma ama-capacitor, lapho-ke inethiwekhi emise okwe-Π ingathathwa njengoxhumano lochungechunge lwe-Γ ehlanekezelwe kanye inethiwekhi enhle ye-Γ. Ngokuklama okujwayelekile, kuyadingeka ukukhetha ifomu elinesakhiwo esilula ngangokunokwenzeka ukuze kube lula ukulungisa iphutha. Lapho okokufaka kwe-antenna kungu-R I-Z0 (i-feeder impedance), ukwakheka kuka-Γ okuhlanekezelwe kuyakhethwa.

 

Ukuvimbela Inethiwekhi ye I-Antenna ATU

 

Isizathu esenza kube nenethiwekhi evimbayo ukuthi i-antenna edlulisayo yesiteshi esiphakathi nendawo esihambisa igagasi inesici sokuphindaphinda.

 

Ngamafuphi, iyunithi yokufanisa ithikithi ingeyakho kokubili i-antenna edlulisayo kanye nothi olwamukelayo, futhi ngokuvamile, isiteshi sokudlulisela asinayo kuphela i-antenna eyodwa kanye nemvamisa, ngakho-ke uthi luthambekele ekuphenduleni imvamisa ephezulu, kanye nemvamisa ephezulu. isignali eseduze itholwa ibheke emuva. Egunjini lokuxuba, i-voltage ephezulu-frequency idluliselwa ngokuhlehla ku-transmitter ngenethiwekhi ye-antenna kanye ne-feeder. Ngokungena kwe-voltage ephezulu-frequency, i-waveform izoshintsha nakanjani, ikhwalithi yesiginali edlulisiwe izoncishiswa, futhi izophinde ithinte isidluliseli. Okokusebenza nokuphepha kuyadlala.

 

Inethiwekhi yokuvimbela iqeda ukuphazanyiswa phakathi kwama-circuits amabili-frequency futhi ithuthukisa ikhwalithi yokuphuma kwesignali ngokusebenzisa uxhumano oluhambisanayo lweziyingi ze-resonant.

 

Kafushane, imiphumela yokuvimba inethiwekhi yilena:

 

• ngokusebenzisa lesi signali yefrikhwensi
• Vimba amanye amasiginali wefrikhwensi

 

Uma udlulisa isignali yale mvamisa, i-impedance akufanele ibe nkulu kakhulu. Lapho uvimba isignali yesinye imvamisa, akufanele kube kuphela i-impedance enkulu kwenye imvamisa, kodwa futhi i-impedance enkulu kufanele ihanjiswe kuma-frequencies angaphezulu nangaphansi kwesinye imvamisa, ukuvimbela imvamisa engadingekile. imvamisa.

 

I-Absorption Network of I-Antenna ATU

 

Ukubaluleka kokuba khona kwenethiwekhi yokumuncwa ukunciphisa izinga lokukhuphuka kwamandla kagesi wesekethe futhi kuvinjwe ukugcwala ngokweqile emikhawulweni yomibili ye-capacitor ukuthi ingalimazi okokusebenza nokudangala ukwehluleka.

 

Inethiwekhi eshunwe ngaphambilini of I-Antenna ATU

 

Inethiwekhi yokulungiswa kwangaphambili iwukufanisa ukuvinjelwa kwe-antenna, ikakhulukazi ngokungeza i-inductance ezansi kothi kanye nokuvinjwa kwe-antenna ngokuhambisana ukuze kwakhe ingxenye yangempela efanelekile yokusabela ukuze kube lula ukuklama nokulungisa iphutha lenethiwekhi efanayo.