FMUSER 50Ω Solid-state Antenna Tuning Unit ya 530-1,700 kHz AM Medium Wave Transmitter Station

Quick View

1. Katswiri Waukadaulo wa FMUSER Antenna Tuning Unit
2. Zina zazikulu za FMUSER Antenna Tuning Unit
3. Komwe Mungagule Gawo Labwino Kwambiri la AM Tuning?
4. Chidutswa cha Antenna Tuning: ndi chiyani ndipo chimagwira ntchito bwanji?
5. Kodi Mapangidwe Oyambira a Unit Tuning ya Antenna ndi chiyani
6. Chifukwa chiyani ATU Ndi Yofunika Pakuwulutsa Kwapakatikati?

 

Katswiri Waukadaulo wa FMUSER Antenna Tuning Unit

 

Terms	zomasulira
Kugwiritsa ntchito pafupipafupi	531-1700 kHz medium wave (MW) gulu lonse
Transmitter Max. Kulowetsa Mphamvu	1KW/5KW/50KW (kutengera zosowa zanu)
Passband bandwidth	25 kHz-30 kHz (theka lamphamvu bandwidth)
Transition lamba bandwidth	30 kHz-80 kHz
Stopband bandwidth	≥100 kHz
Mlingo wa antenna stand wave ratio	mkati mwa ± 5 kHz≤1.05, mkati mwa ± 10 kHz≤1.3
Kutsekereza koyimitsa	Pamene ma frequency ndi 100 kHz kutali ndi ma frequency apakati, attenuation ndi 25 dB.
Kuteteza mphezi	mphamvu yotsalira ya mphezi ndi yosakwana 200 mJ

 

Funsani mtengo wa ogwidwawo

 

Zina zazikulu za FMUSER Antenna Tuning Unit

• Chigawo chosinthira cha antenna chimatha kugwiritsidwa ntchito pa nsanja imodzi pafupipafupi, ma frequency apawiri, ndi ma frequency atatu, komanso ma transmitters apakatikati amitundu yosiyanasiyana yamagetsi.
• Wapadera maginito lumikiza kudzipatula mphezi chitetezo luso, kuwonjezera pa chikhalidwe nthaka inductance chitetezo mphezi, capacitive kudzipatula mphezi chitetezo, ndi graphite kutulutsa ozungulira maginito mphete chitetezo mphezi, gawo lomaliza la maukonde komanso akuwonjezera electromagnetic lumikiza kudzipatula chitetezo mphezi, chifukwa si. chipangizo chachikhalidwe Kuwongolera kwachindunji ndi mawonekedwe ake osankhidwa pafupipafupi zimapangitsa kuti zikhale zosatheka kuti mphamvu ya mphezi iperekedwe mwachindunji kwa chowulutsira kudzera pa netiweki ya tinyanga. Mapangidwe azinthu zapaintaneti izi amatengera kuphatikizika kwaukadaulo wamaukadaulo wapaintaneti ndi ukadaulo wophatikizira wodzipatula wamagetsi, kuphatikiza mtundu wa L-mtundu, kapangidwe ka mtundu wa π, komanso kamangidwe kachitetezo ka mphezi, komanso kudzipatula kwatsopano kwa electromagnetic coupling. Kuyambira 2014, yakhala ikugwiritsidwa ntchito kwambiri pazogwiritsa ntchito ndipo yalandiridwa bwino ndi ogwiritsa ntchito. Pakadali pano, sipanakhalepo kulephera kwa ma transmitter chifukwa cha mphezi, kapena kulephera kwa netiweki imodzi ya air conditioning.
• Pogwiritsa ntchito chiwongolero cha chip-chimodzi, mtengo wa kusintha kwa inductance ukhoza kukhala 0.1uH, ndipo kulondola kwakusintha ndikokwera.
• Kutumiza opanda zingwe, ndi "bokosi lowongolera" ndi "bokosi lokonzekera" amapangidwa ndi chitetezo cha mphezi kuti apititse patsogolo kudalirika kwa kuwongolera.
• Mtundu wosinthika wa koyiloyo uli pafupi ndi 10uH, ndipo mitundu yofananira ndi kutsitsa ilinso yotakata kwambiri (VSWR yoyesedwa mkati mwa 1.5 imatha kufananizidwa bwino ndi 50Ω).
• Wokhala ndi chitetezo chowongolera mopitilira muyeso, palibe chifukwa chodera nkhawa za kuwonongeka kwa koyilo komwe kumachitika chifukwa cha misoperation.

  

FMUSER: Wopanga Wabwino Kwambiri wa AM Antenna Tuning Unit kuchokera ku China

 

 

FMUSER ndi m'modzi mwa opanga ndi ogulitsa zida zazikulu za AM ku China. Timapereka zida zoulutsira zaukadaulo za AM (LW/SW/MW) ndi mayankho athunthu a mawayilesi a AM, kuphatikiza kugulitsa ma transmitters apakati, 50Ω MW antenna tuning unit (mphamvu zolowetsa zimadalira mphamvu yanu ya AM transmitter), ndi ma transmitter angapo apamwamba. quality AM kuwulutsa tinyanga, dummy katundu ndi zipangizo zina akatswiri. 

 

Onerani makanema athu opangira 10kW AM omwe ali pamalowo ku Cabanatuan, Philippines:

 

 

Titha kukupatsirani nyumba zokonzedweratu kuti zigwirizane ndi mayunitsi amphamvu kwambiri. Nyumbazi zimagwiritsa ntchito njira yokhazikitsira mwachangu, yomwe imatha kuthetsedwa potengera zotengera. Ndiwotchingidwa ndi thovu, okhala ndi chitetezo cha RF, amatha kukhala ndi makina amagetsi athunthu omwe amakwaniritsa miyezo yapaderalo, ndipo amatha kuphatikiza makina otenthetsera / mpweya.

 

Kugwiritsa ntchito nyumbazi kumafupikitsa kwambiri nthawi yotumizidwa pamalowo. Nyumbayi idayikidwa ndikuyesedwa mufakitole ya FMUSER ndipo gawo la dongosolo la antenna linayikidwa. Kenako, gawo lonse la tinyanga tating'onoting'ono limayikidwa chizindikiro ndikujambulidwa kuti lisonkhanitsidwe mwachangu pamalo a kasitomala musanatumize.

 

Mutha kupereka zowonjezera ndi zosankha zingapo pagawo lathu lofananira ndi antenna, kapena kukweza kapena kukonza makina omwe alipo. Izi zikuphatikiza mica ndi vacuum capacitor, zida zamphamvu kwambiri, ma RF inductors ndi ma coil, ma ammita a RF, zotsekera nsanja, zosinthira zowunikira, zotsatsira zowunikira, ndi makabati.

 

Ntchito zofananira zoperekedwa:

 

• Kuwunika Kwatsamba Ndi Kufufuza
• Antenna Ndi Rf System Design
• Mayang'aniridwe antchito
• Kuyika Kuyang'anira
• Kuthetsa Mavuto Ndi Kusamalira
• Kuyang'anira Kusamalira
• Mayeso a Antenna System
• Mayeso a Electromagnetic Hazard

 

Funsani mawu lero kuti tikuthandizeni kupanga wayilesi yanu ya AM!

 

Lumikizanani nafe Lero

Zinthu Zomwe Muyenera Kuzikonda Mutha Kuzikondanso

 

High Power Solid-state AM Transmitters Kufikira 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

 

Mayeso a AM Tower Antenna Amadzaza
1, 3, 10KW AM kuyesa katundu	100KW AM transmitter test load	200KW AM transmitter test load

 

Funsani Mawu

 

Medium Wave AM Antenna Tuning Unit: Ndi Chiyani Ndipo Imagwira Ntchito Motani?

 

The medium wave Antenna Tuning Unit (ATU) amatanthauza chida cholumikizira pakati pa chowulutsira cha AM ndi mlongoti wa AM.

 

Chonyamulira chomwe chimapangidwa ndi chowulutsira cha AM chimatumizidwa ku mlongoti kudzera mu coax feeder, ndipo mlongotiyo umatulutsa mafunde amagetsi.

 

Chigawo chosinthira antenna chimatchedwanso motere:

 

• Chochuna cha mlongoti
• Makina ojambulira mlongoti
• Kusintha kwa antenna
• Mgwirizano wa antenna
• Chochunira nyerere
• Antenna ATU
• Wojambula wa antenna
• Chigawo chofananira cha antenna
• Chigawo chosinthira antenna
• Chigawo cha antenna
• ATU antenna
• ATU antenna chochunira
• Chochunira mlongoti wa Auto
• Gawo la AM antenna
• Antenna impedance yofananira netiweki
• ATU antenna tuning unit

 

Mapangidwe a Chigawo cha Antenna: Kufotokozedwa ndi FMUSER 

 

Chochunira chodziwikiratu cha mlongoti ndi mlatho womwe umalumikiza coax feeder, transmitter, ndi mlongoti, posintha magawo otumizira, gawo losinthira mlongoti limatha kukwanitsa kusokoneza komweko pakati pa kumapeto kwa mlongoti wotumizira ndi wodyetsa ndikubweza. kachitidwe ka mlongoti wotumizira.

 

 

M'malo mwake, munjira yoperekera mlongoti, mlongoti ndi wodyetsa ndi machitidwe awiri.

 

Chifukwa cha mawonekedwe osiyanasiyana a impedance, gawo la mphamvu yamagetsi imawonekeranso kuti ipange mafunde oyimirira pamzere. Chiyerekezo cha nsonga ya voteji ndi nsonga ya voteji ya mafunde oyimilira amatchedwa chiŵerengero cha voltage Stand wave.

 

Pamene chiŵerengero choyimirira chili chofanana ndi 1, zikutanthauza kuti mlongoti ndi wodyetsa zimagwirizana kwathunthu, ndipo mphamvu yothamanga kwambiri ya transmitter imawululidwa ndi mlongoti. Mlingo wa kufananitsa pakati pa mlongoti ndi chodyetsa umayezedwa ndi chiwongolero chowoneka bwino kapena chiŵerengero cha mafunde oimilira cha kulowetsa kwa mlongoti.

 

Kwa mlongoti wotumizira, ngati kukonza kwa mlongoti sikuli bwino, mphamvu yowunikira ya mlongoti idzachepa, kutayika kwa wodyetsa kumawonjezeka, ndipo mphamvu ya wodyetsa idzachepanso.

 

Chiyerekezo cha voteji ya siginecha ndi ma siginecha apano pakulowetsa kwa mlongoti amatchedwa kulowetsedwa kwa mlongoti. Impedance yolowetsayo ili ndi gawo lotsutsa R ndi gawo lokhazikika la X, ndiye kuti, impedance Z=R+JX.

 

Kukhalapo kwa chigawo chogwira ntchito kudzachepetsa kutulutsa mphamvu ya siginecha kuchokera ku mlongoti kuchokera ku wodyetsa. Chifukwa chake, gawo lokhazikika liyenera kupangidwa ngati zero momwe zingathere, ndiye kuti, kulowetsedwa kwa mlongoti kuyenera kupangidwa kukana koyera momwe kungathekere.

 

Chifukwa chake, gawo lofananira la mlongoti limawonjezedwa pakati pa mlongoti ndi chodyetsa.

 

Mukuyang'ana zida zambiri zopangira makina amtundu wa antenna pawailesi yanu yowulutsira? Onani izi!

 

Coax Connectors	Mzere Wokhazikika & Magawo	Zosefera za RF Cavity	Ma Transmitter Combiners
RF Dummy Loads	Chitetezo cha mphezi	Ma Antennas a FM	Kutumiza kwa FM
Ma Transmitters a AM	AM Antennas	Ma TV Transmitters	Ma Antennas a TV

 

Ngati chikhalidwe cha chodyetsa ndi 50 Ω, posintha kutsekeka kwa mlongoti, gawo loyerekeza la kulowetserako limakhala laling'ono ndipo gawo lenileni lili pafupi ndi 50 Ω mkati mwa ma frequency ofunikira kuti kulowetsedwa kwa mlongoti kukhale kocheperako. Z=R=50 Ω, ndipo kufananiza kwabwino pakati pa mlongoti ndi chodyetsa kumatheka. Poyesa kwenikweni, nthawi zambiri timagwiritsa ntchito vector network analyzer kuyeza kulephera.

 

 

Cholinga chokhazikitsa gawo lofananira ndi mlongoti ndikuchepetsa kuchuluka kwa mafunde, kuchepetsa mphamvu yowonetsera, kupititsa patsogolo kufalikira, kapena kupititsa patsogolo kufalikira.

 

Kuti musinthe gawo la AM antenna, mbali imodzi, mlongoti uyenera kukhala wowoneka bwino, ndipo mbali inayo, kutsekeka kwa mlongoti kuyenera kufananizidwa ndi cholumikizira chotumizira pambuyo posinthidwa ndi netiweki yofananira.

 

Zachidziwikire, ngakhale mlongoti wopangidwa bwino komanso wokonzedwa bwino nthawi zonse umakhala ndi gawo laling'ono lothandizira pakuyika kwake.

 

Ma Antennas a AM Transmitter alangizidwa pagawo la Tuning la Antenna

 

FMUSER Shortwave (SW) Antenna Solutions Pitani ku Zambiri
Omin-quadrant SW Ant	SW Omni-multi-feed Nyerere	Nyerere Zozungulira SW
SW Rotatable Curtain Arrays	SW Curtain Arrays HRS 8/4/H	SW Cage Antenna
SW Curtain Arrays HRS 4/4/H	SW Curtain Arrays HRS 4/2/H	SW Curtain Arrays HR 2/1/H
	FMUSER shortwave transmitter antenna mayankho - Pitani kuti mudziwe zambiri
SW Curtain Arrays HR 2/2/H

 

Lumikizanani ndi Akatswiri athu

 

FMUSER Medium Wave (MW) Antenna Solutions Pitani ku Zambiri
Kulandira Omni MW Ant	MW Shunt Fed Nyerere	Directional MW Ant

 

Funsani Mawu

 

Chifukwa chiyani Unit Tuning ya Antenna ndiyofunikira pa Kuwulutsa Kwapakatikati?

 

Nthawi zambiri, station wave wave transmitter imakhala ndi zida zotsatirazi:

 

• Chubu cholimba cha mkuwa
• Ma feeders osiyanasiyana ndi zolumikizira
• medium wave transmitter
• Mpanda wa antenna wapakati
• MW Antenna Dummy Load
• Chigawo chofananira cha antenna

 

Zina mwa izo, ntchito zazikulu za unit yokonza antenna ndi:

 

1. High-frequency maganizo kupondereza
2. Kusagwirizana kwa impedance
3. Kuteteza mphezi

 

Zida zomwe zili m'chipinda chotumizira ma transmitter zimaphatikizapo mapaipi amkuwa olimba, ma feed ndi zolumikizira zosiyanasiyana, ndi ma wave transmitters apakati, pomwe nsanja ya medium wave antenna tower ndi AM antenna tuning unit nthawi zambiri zimayikidwa panja (njira yosinthira antenna imatha kuyikidwanso mkati. ndi wave transmitter).

 

Antenna Tuning Unit idabadwa chifukwa chakusintha kwa MW Transmission Conditions

 

Chifukwa cha kukhazikika kwa chilengedwe, kukonza zida zamkati ndikosavuta kuchita, pomwe kukonza zida zapanja zapakatikati ndizovuta kwambiri, makamaka kukhazikitsa ndi kutumiza tinyanga tapakatikati ndi mayunitsi a ATU - chifukwa cha ntchitoyi Ambiri a iwo amachitikira kunja, kotero kuti malo ogwira ntchito adzakhala osauka ndipo vuto lokonzekera lidzakhala lokwera kwambiri.

 

Kuphatikiza apo, ndi chitukuko cha mzindawo, maukonde a antenna amawonongeka mosavuta, malo ozungulira ma elekitiroma akhala ovuta kwambiri, komanso kuchuluka kwa ma transmitters chifukwa cha kulephera kwa mlongoti ndi wodyetsa nawonso akuwonjezeka. Kuchulukirachulukira kwa ma netiweki owongolera kwakhala kochulukira kuposa kale.

 

The Antenna Tuning Unit ndiye Ultimate Network for Transmitter Station

 

Ndikoyenera kutchula kuti kulowetsedwa kwa mlongoti nthawi zambiri kumagwirizana ndi mawonekedwe ake a geometric komanso kuchuluka kwa mafunde a wailesi omwe akubwera. Apa, mayunitsi osinthira antenna omwe amafanana ndi kulowetsedwa kwa mlongoti komanso kusakhazikika kwa chodyetsa amafunikira kuti athe kutulutsa kwa transmitter. Mphamvu yothamanga kwambiri imatha kuperekedwa ku mlongoti nthawi zonse.

 

Nthawi yomweyo, monga ma network omaliza a ma transmitter system, gawo la ATU la antenna silimangokhudzana ndi ngati chopatsiracho chimatha kuyatsidwa bwino, komanso mtundu ndi chitetezo cha chizindikiro chomwe chimaperekedwa ndi chotumizira. Zikavuta kukonza cholakwikacho, zipangitsa kuti wailesi iyimitsidwe kwa nthawi yayitali. kuwulutsa (ndipo izi zimachitika nthawi zambiri), zomwe zingawononge ndalama za wayilesiyo.

 

Kukonzekera Kwabwino kwa Chigawo cha Tuning cha Antenna ndikofunikira

 

Kuyika kosalala, kukonza zolakwika, ndi chitetezo cha makina a antenna ndikofunikira kwambiri pagawo lililonse lotsegulira.

 

Chifukwa cha zolinga zosiyanasiyana, chipinda chosinthira ma wave wave m'maiko ambiri / madera ambiri sichingapange chipinda chofananira, ndipo chimangogwiritsa ntchito bokosi lofananira. Zofunikira zofananira zoyika mabokosi ndi:

         

• Kukula kwa bokosi kuyenera kukhala koyenera malo oti akhazikitsidwe.
• Pamene stratifying danga lamkati la bokosi, ganizirani kukula kwa inductor chofunika ndi kulola kuti kuikidwa.
• Chifukwa cha ntchito yakunja kwa nthawi yayitali, ndikofunikira kuganizira kuti zinthu za bokosi siziyenera kukhala madzi, zosapsa ndi moto, zosachita dzimbiri, zosagwira fumbi komanso zolimba.
• Kulemera konse kwa bokosi kuyenera kukhala koyenera kuyika ndikuganizira za kunyamula kwa mtengo.
• Khomo la bokosi liyenera kukhala lotha kuchotsedwa momwe mungathere poyezera ndi kukonza zolakwika, ndipo chitseko cha bokosi chitha kutsegulidwa kutsogolo ndi kumbuyo ngati mikhalidwe ikuloleza.

 

Komabe, kugwiritsa ntchito mabokosi ofananitsa kudzachepetsa kwambiri kuchuluka kwa zigawo zomwe ziyenera kuyikidwa. Palibe zigawo zambiri ndi malo ochepa oyika, ndipo magawo ogawa ndi ovuta, zomwe zimawonjezera kuvutika kwa kukhazikitsa, kukonza zolakwika, ndi kukonza.

 

Zinthu Zomwe Muyenera Kuzikonda Mutha Kuzikondanso

Mpaka 1000 Watts Ma transmitter a Low Power FM	Mpaka 10000 Watts Ma transmitter amphamvu kwambiri a FM	Zotumiza, tinyanga, zingwe Phukusi la ma transmitter a FM
Situdiyo ya wayilesi, ma transmitter station Zida Zapa Radio Station	STL TX, RX, ndi mlongoti Zogwirizana ndi STL	1 mpaka 8 bays FM antenna phukusi FM Antenna System

 

Chidutswa cha Antenna Tuning: Bwino Anakonza kwa Kukonza kwa Antenna Yachikhalidwe

 

Makina opangira ma transmitter achikhalidwe sangathe kukwaniritsa zosowa za tsiku ndi tsiku

 

Ndi chitukuko chofulumira chaukadaulo pamakampani owulutsa, makina owulutsa mafunde apakati pang'onopang'ono agwiritsa ntchito matekinoloje amakono, omwe samangokwaniritsa zofunikira za ma transmitter komanso amathandizira kwambiri ntchito. Monga chopangidwa ndi nyengo yatsopano, chowulutsira champhamvu chamtundu uliwonse chili ndi zabwino zoteteza chilengedwe komanso kugwiritsa ntchito mphamvu zochepa.

 

Pakadali pano, ma transmitter apakati ndi omwe amagwiritsidwa ntchito kwambiri pamakampani owulutsa pa TV. Zimachepetsa kwambiri mtengo wokonza ndi kuteteza wotumizira ndikuchepetsa kugwiritsa ntchito zinthu komanso ntchito za ogwira nawo ntchito. katundu.

 

Ziyenera kunenedwa kuti kupambana kwakukulu muukadaulo wapakatikati ndikufufuza ndikugwiritsa ntchito ma transmitters a 10kw all-solid-state medium wave wave. Poyerekeza ndi ma transmitter apakati apakatikati, magwiridwe antchito a chipangizocho asinthidwa kwambiri ndipo kukonza kwake ndikosavuta, komwe kumapangitsa kuti dongosolo lonse liziyenda bwino.

 

Kusintha kwamtundu wa transmitter kumagwiritsa ntchito netiweki yotulutsa makina kuti ifanane ndi netiweki ya antenna, zomwe sizimangowonjezera kutayika komanso sizingatsimikizire kugwira ntchito kwa makinawo.

 

Ngakhale ma transmitter apakati amphamvu amtundu uliwonse amatengera mawonekedwe ophatikizika olondola, zofunikira pa malo ogwirira ntchito zimakongoletsedwa, ndipo kuthekera kodzitchinjiriza ndikuwunika kwa transmitter kumakulitsidwa. Ndi kusintha pang'ono, chowulutsira nthawi zambiri chimatsitsa mphamvu kapena kuzimitsa yokha.

 

Mapangidwe Osakwanira a Medium Wave Transmitter

 

Komanso, chifukwa mphamvu zotsutsana ndi kusokoneza komanso kukana kwamagetsi otsika azitsulo zazitsulo zachitsulo za oxide semiconductor field effect transistor zomwe zimagwiritsidwa ntchito muzitsulo zolimba zamtundu uliwonse sizili bwino, zidzakhala ndi chikoka choipa pa netiweki ya mlongoti panthawi ya opareshoni. .

 

Kaya chopatsira chimatha kufalitsa mosasunthika komanso modalirika ndikukwaniritsa mphamvu zotumizira kwambiri zimakhudzidwa kwambiri ndi kapangidwe kagawo la tinyanga tating'onoting'ono.

 

Kuwonekera kwa netiweki yosinthika kwasintha kachitidwe kakale ka antenna-feeder ndikufananiza ndi kutsika kumapeto kwa transmitter. Chiwopsezo cha mlongoti chikasintha ndi kutentha kapena chinyezi, kulowetsedwa kwa netiweki yosinthira mlongoti kumapatuka pa 50Ω. Posintha ma adaptive network, The impedance ya antenna tuning unit imafananizidwanso ndi 50Ω, kuti zitsimikizire kuti transmitter ikukwaniritsa njira yabwino yotumizira.

 

Popeza maukonde osinthika ndikusintha kosalumikizana, kusinthako sikukhudza kuwulutsa kwanthawi zonse kwa transmitter, ndipo palibe chodabwitsa kuti kusintha kumakhala kovuta kapena kosatheka kusintha pakatha kusintha kangapo.

 

Kodi Mapangidwe Oyambira a Unit Tuning ya Antenna ndi chiyani

 

Chigawo chosinthira cha antenna chimapangidwa makamaka ndi netiweki yofananira, maukonde otsekereza, netiweki yoyamwa, netiweki yokhazikitsidwa kale, chitetezo cha mphezi, ndi magawo ena.

 

Pakugwiritsa ntchito, chifukwa mlongoti wapakati ndi wokwera kwambiri, umakhudzidwa mosavuta ndi mphezi ndi chilengedwe chamagetsi. Pofuna kuonetsetsa chitetezo ndi ntchito yabwino ya transmitter, ena ogulitsa ma network a antenna amayika mipira yotulutsa ma graphite pakhomo la mlongoti kuti itulutse. Kapena onjezani netiweki yotsekereza ndi chitetezo cha mphezi pa netiweki yofananira.

 

Matching Network of Antenna ATU

 

Kufunika kwa kukhalapo kwa netiweki yofananira ndikupanga transmitter yolimba-yonse yapakati-wave yowulutsa komanso kukana kwa chikhalidwe cha feeder kulumikizidwa kwambiri kuti ipeze makonda a netiweki mumkhalidwe wofananira. Netiweki yofananira ilibe mphamvu pakugwira bwino ntchito kwa ma transmitter olimba-state medium-wave media. zotsatira zochepa.

 

Chingwe chofananira cha antenna ndi netiweki yolumikizirana mopanda msoko pakati pa transmitter ya medium wave transmitter ndi kukana kwachakudya, ndipo netiweki imayikidwa munjira yofananira kotero kuti transmitter yonse ya medium wave transmitter ikhoza kukhala mu ntchito yabwino state.

 

Cholinga chowonjezera netiweki yofananira ndi pulogalamu ya antenna feeder ndikupangitsa kuti kutsekeka kwa mlongoti ndi kutsekeka kwa wodyetsa kukhala kofanana kapena kofanana. Pali mitundu itatu ya netiweki yofananira: mawonekedwe a Γ, mawonekedwe a T, ndi mawonekedwe a Π, pomwe mawonekedwe a Γ amagawidwa kukhala mawonekedwe abwino a Γ ndi mawonekedwe opindika a Γ.

 

Maukonde opangidwa ndi Γ ndi osavuta, okhala ndi zigawo ziwiri (magulu awiri), inductor, ndi capacitor. Mwachidziwitso, netiweki yooneka ngati Γ imatha kufanana ndi zopinga zilizonse zomwe tikufuna. Netiweki yooneka ngati Π imakhala ndi zigawo zitatu, ndipo inductance kapena capacitance ya mkono wotsatizana imawonedwa ngati kulumikizana kwa ma inductances awiri kapena capacitor, ndiye kuti netiweki yooneka ngati Π imatha kuonedwa ngati kulumikizidwa kwamtundu wa inverted Γ ndi zabwino Γ network. Pamapangidwe ambiri, pamafunika kusankha mawonekedwe okhala ndi mawonekedwe osavuta momwe angathere kuti athe kuwongolera zolakwika. Pamene kulowetsedwa kwa mlongoti ndi R Z0 ( feeder impedance ), mawonekedwe otembenuzidwa Γ amasankhidwa.

 

Maukonde opangidwa ndi Γ ndi osavuta, okhala ndi zigawo ziwiri (magulu awiri), inductor, ndi capacitor. Mwachidziwitso, netiweki yooneka ngati Γ imatha kufanana ndi zopinga zilizonse zomwe tikufuna. Netiweki yooneka ngati Π imakhala ndi zigawo zitatu, ndipo inductance kapena capacitance ya mkono wotsatizana imawonedwa ngati kulumikizana kwa ma inductances awiri kapena capacitor, ndiye kuti netiweki yooneka ngati Π imatha kuonedwa ngati kulumikizidwa kwamtundu wa inverted Γ ndi zabwino Γ network. Pamapangidwe ambiri, pamafunika kusankha mawonekedwe okhala ndi mawonekedwe osavuta momwe angathere kuti athe kuwongolera zolakwika. Pamene kulowetsedwa kwa mlongoti ndi R Z0 ( feeder impedance ), mawonekedwe otembenuzidwa Γ amasankhidwa.

 

Kuletsa Network ya Antenna ATU

 

Chifukwa chomwe pali network yotsekereza ndikuti mlongoti wotumizira wapakati pa ma wave wave ali ndi mawonekedwe obwereza.

 

M'malo mwake, mlongoti wofananira ndi wa mlongoti wotumizira ndi wolandila, ndipo nthawi zambiri, malo otumizira sakhala ndi mlongoti umodzi wokha komanso ma frequency, kotero mlongotiyo umakonda kuyankha pafupipafupi, komanso kuchuluka kwafupipafupi. chizindikiro chapafupi chimalandiridwa kulowera chakumbuyo. M'chipinda chosanganikirana, voteji yothamanga kwambiri imaperekedwa mosinthana ndi ma transmitter kudzera pa netiweki ya antenna ndi feeder. Ndi kuchuluka kwa ma voliyumu apamwamba kwambiri, mawonekedwe a waveform adzasintha mosalephera, mtundu wa chizindikiro chopatsirana udzachepetsedwa, komanso zimakhudzanso wotumiza. Zida ndi chitetezo zimasewera.

 

Ma network otsekereza amathetsa kusokoneza komwe kuli pakati pa ma frequency awiri-frequency ndikuwongolera kutulutsa kwazizindikiro kudzera mu kulumikizana kofananira kwa ma frequency a resonant.

 

Mwachidule, zotsatira za kutsekereza maukonde ndi:

 

• kudzera pa ma frequency awa
• Letsani ma frequency ena

 

Podutsa chizindikiro cha ma frequency awa, impedance sayenera kukhala yayikulu kwambiri. Potsekereza chizindikiro cha ma frequency ena, osati kusokoneza kwakukulu kuyenera kuwonetsedwa pafupipafupi kwina, komanso kutsekeka kwakukulu kuyenera kuwonetsedwa kumtunda ndi kumunsi kwa ma frequency ena, kutsekereza pafupipafupi kosafunikira. pafupipafupi.

 

Absorption Network of Antenna ATU

 

Kufunika kwa kukhalapo kwa netiweki yamayamwidwe ndikuchepetsa kuchuluka kwa kukwera kwa voteji ndikuletsa kuphulika kwa malekezero onse a capacitor kuwononga zida ndikupangitsa kulephera.

 

Network yokonzedweratu of Antenna ATU

 

Netiweki yokonzedweratu ndiyofanana ndi kulepheretsa kwa mlongoti, makamaka powonjezera inductance pansi pa mlongoti ndi kutsekeka kwa mlongoti kufananiza kuti apange gawo lenileni la momwe zimachitikira kuti zithandizire kupanga ndi kukonza maukonde ofananira.