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

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  1. Tech Spec o FMUSER Antenna Tuning Unit
  2. ʻO nā hiʻohiʻona nui o ka FMUSER Antenna Tuning Unit
  3. Where to Buy the Best AM Tuning Unit?
  4. Antenna Tuning Unit: He aha ia a pehea e hana ai?
  5. What is the Basic Structure of an Antenna Tuning Unit
  6. No ke aha he mea koʻikoʻi ʻo ATU no ka hoʻolaha ʻana i ka hawewe hawewe?

 

Tech Spec o FMUSER Antenna Tuning Unit

 

lIKE Specs
Ka hoʻohana ʻā ʻana 531-1700 kHz hawewe nalu (MW) piha piha
Mea hoʻouna Max. Mana Hookomo 1KW / 5KW / 50KW (ma muli o kāu pono)
bandwidth passband 25 kHz-30 kHz (ka hapalua mana bandwidth)
Hoʻololi kāʻei bandwidth 30 kHz-80 kHz
ʻO ka bandwidth stopband ≥100 kHz
Antenna kū lākiō hawewe i loko o ± 5 kHz≤1.05, i loko o ± 10 kHz≤1.3
Kāohi ʻana i ka pahu pani Ke 100 kHz ka mamao mai ke alapine waena, ʻo ka attenuation ʻo 25 dB
ʻO ka mālama uila ʻo ka ikehu koena o ka uila ma lalo o 200 mJ

 

Noi mai i ka olelo

 

ʻO nā hiʻohiʻona nui o ka FMUSER Antenna Tuning Unit

fmuser-medium-wave-am-antenna-tuning-unit-for-am-transmitter-station.jpg

  • The antenna tuning unit can be applied to one tower single frequency, dual frequency, and triple frequency, as well as medium wave transmitters of various power levels.
  • Unique electromagnetic coupling hoʻokaʻawale uila pale ʻenehana, ma ka hoʻohui i ka kuʻuna honua inductance uila pale, capacitive kaawale ka uila pale, a me ka graphite hoʻokuʻu spherical magnetic apo uila uila pale, ka hope pae o ka pūnaewele hoʻohui pū electromagnetic coupling hoʻokaʻawale i ka uila palekana, no ka mea, ʻaʻole ia. he mea hana kuʻuna ʻAʻole hiki ke hoʻouna pololei ʻia ka ikehu uila i ka transmitter ma o ka pūnaewele antenna. Hoʻolālā ka hoʻolālā o kēia pūʻulu o nā huahana pūnaewele i ka hui pū ʻana o ka hoʻolālā ʻenehana kuʻuna a me ka ʻenehana hoʻokaʻawale electromagnetic coupling, me ke ʻano L-type, π-type design, a me ka hoʻolālā pale uila maʻamau, a me ka hoʻokaʻawale electromagnetic coupling hou. Mai ka makahiki 2014, ua hoʻohana nui ʻia i nā noi a ua hoʻokipa maikaʻi ʻia e nā mea hoʻohana. I kēia manawa, ʻaʻohe hemahema o ka transmitter i hoʻokumu ʻia e ka uila, ʻaʻole hoʻi i hoʻokahi hemahema ʻoihana ea.
  • Me ka hoʻohana ʻana i ka mana hoʻokahi-chip, hiki ke 0.1uH ka pae ʻanuʻu o ka hoʻoponopono inductance, a ʻoi aku ka kiʻekiʻe o ka hoʻoponopono pololei.
  • Hoʻolālā ʻia ka hoʻoili uila, a me ka "pahu hoʻomalu" a me ka "pahu hoʻopono" me ka pale uila e hoʻonui i ka hilinaʻi o ka mana.
  • ʻO ka adjustable range o ka coil kokoke i 10uH, a ʻo ka laulā o ka hoʻohālikelike a me ka detuning he ākea loa (ʻo ka VSWR i hoʻāʻo ʻia i loko o 1.5 hiki ke hoʻohālikelike ʻia me 50Ω).
  • Hoʻolako ʻia me ka pale o ka hoʻoponopono ʻana, ʻaʻohe pono e hopohopo e pili ana i ka pōʻino o ka coil i kumu ʻole ʻia.

  

FMUSER: Best Manufacturer of AM Antenna Tuning Unit from China

 

ʻO FMUSER 100 kW AM hoʻokomo i ka transmitter ma Guinea

 

FMUSER is one of the largest AM broadcasting equipment manufacturers and suppliers in China. We provide professional AM (LW/SW/MW) broadcasting equipment and complete turnkey solutions for AM broadcasting stations, including the sale of medium wave transmitters, 50Ω MW antenna tuning unit (input power depends on your AM transmitter power), and several high-quality AM broadcast antennas, dummy loads and other professional equipment. 

 

We can provide customized prefabricated buildings for high-power antenna matching units. These buildings use a quick installation system, which can be completely dismantled for container transportation. They are foam insulated, contain RF shielding, can be equipped with a complete electrical system that meets any local standards, and can include heating/air conditioning systems.

 

The use of these buildings greatly shortens the on-site commissioning time. The building was installed and tested in the FMUSER factory and the antenna tuning system module was installed. Then, the whole antenna tuning unit is marked and recorded for quick assembly at the customer's site before container shipment.

 

You can provide various accessories and options for our antenna matching unit, or upgrade or repair your existing system. These include mica and vacuum capacitors, high-power components, RF inductors and coils, RF ammeters, tower insulators, lighting transformers, lighting chokes, and cabinets.

 

Hāʻawi ʻia nā lawelawe maʻamau:

 

  • Ka Loiloi a me ka Imi
  • Antenna A me Rf System Design
  • Project Management
  • Nānā Hoʻokomo
  • Hoʻoponopono a mālama
  • Nānā mālama
  • Hoʻāʻo ʻōnaehana Antenna
  • Electromagnetic Hazard Test

 

E noi i kahi ʻōlelo i kēia lā a e kōkua mākou iā ʻoe e kūkulu i kāu lekiō AM!

 

E kelepona iā mākou i kēia lā

Nā Huahana Manaʻo ʻia E hoihoi paha ʻoe iā ʻoe

 

ʻO nā mea hoʻouna AM paʻa paʻa kiʻekiʻe a hiki i 200 kW
FMUSER kūlana paʻa 1KW AM transmitter.jpg FMUSER kūlana paʻa 3KW AM transmitter.jpg FMUSER kūlana paʻa 5KW AM transmitter.jpg FMUSER kūlana paʻa 10KW AM transmitter.jpg
1KW AM mea lawe 3KW AM mea lawe 5KW AM mea lawe 10KW AM mea lawe
FMUSER kūlana paʻa 25KW AM transmitter.jpg FMUSER kūlana paʻa 50KW AM transmitter.jpg FMUSER kūlana paʻa 100KW AM transmitter.jpg FMUSER kūlana paʻa 200KW AM transmitter.jpg
25KW AM mea lawe 50KW AM mea lawe 100KW AM mea lawe 200KW AM mea lawe

 

ʻO nā ukana hoʻāʻo ʻo AM Tower Antenna
1KW, 3KW, 10KW kūlana paʻa AM transmtter dummy load.jpg 100KW AM dummy load.jpg 200KW AM dummy load.jpg
1, 3, 10KW AM haawe ho'āʻo 100KW AM transmitter ho'āʻo ukana 200KW AM transmitter ho'āʻo ukana

 

Noi mai no ka olelo

 

Medium Wave AM Antenna Tuning Unit: What it is and How does it Work?

 

ʻO ka nalu waena ʻāpana hoʻoheheʻe antenna (ATU) refers to a piece of coupling equipment between the AM broadcast transmitter and the AM broadcast antenna.

 

Hoʻouna ʻia ka mea lawe i hana ʻia e ka mea hoʻolaha hoʻolaha AM i ka antenna ma o ka coax feeder, a hoʻomālamalama ka antenna i nā nalu electromagnetic.

 

The antenna tuning unit is also named as follows:

 

  • Antenna tuner
  • Automatic antenna tuner
  • ʻO ka hoʻoponopono ʻana i nā Antenna
  • Antenna match
  • Ant tuner
  • Antenna ATU
  • Antenna matcher
  • Antenna matching unit
  • Antenna tuning unit
  • Antenna ʻāpana
  • ATU antenna
  • ATU antenna tuner
  • Auto antenna tuner
  • AM antenna tuning unit
  • Antenna impedance matching network
  • ATU antenna tuning unit

 

Antenna Tuning Unit Design: Explained by FMUSER 

 

The automatic antenna tuner is the bridge that connects the coax feeder, transmitter, and the antenna, by adjusting the transmission parameters, an antenna tuning unit is able to seamless achieve the same impedance between the input end of the transmitting antenna and the feeder and compensating the reactance of the transmitting antenna.

 

fmuser-medium-wave-am-antenna-tuning-unit-collections.jpg

 

ʻO ka ʻoiaʻiʻo, i ka ʻōnaehana feeder antenna transmitter, ʻelua ʻōnaehana ka antenna a me ka mea hānai.

 

Ma muli o nā ʻano impedance ʻokoʻa, ʻike ʻia kahi ʻāpana o ka ikehu electromagnetic e hana i kahi nalu kū ma ka laina. Ua kapa ʻia ka lakio o ka piko o ka volta i ka ʻauwai o ka hawewe kū i ka lākiō hawewe kū.

 

Ke like ka lakio hawewe kū i ka 1, ʻo ia hoʻi ua hoʻohālikelike ʻia ka antenna a me ka mea hānai, a ua hoʻomālamalama ʻia ka ikehu kiʻekiʻe o ka transmitter e ka antenna. Hoʻohālikelike ʻia ke kiʻekiʻe o ka hoʻohālikelike ʻana ma waena o ka antenna a me ka mea hānai e ka helu noʻonoʻo a i ʻole ka pae hawewe kū o ka hoʻokomo antenna.

 

For the transmitting antenna, if the antenna tuning is not good, the radiated power of the antenna will decrease, the loss of the feeder will increase, and the power capacity of the feeder will also decrease.

 

ʻO ka ratio o ka volta hōʻailona i ka hōʻailona o kēia manawa ma ka hoʻokomo o ka antenna i kapa ʻia ʻo ka impedance hoʻokomo o ka antenna. Loaʻa i ka impedance hoʻokomo kahi ʻāpana kūʻē R a me kahi ʻāpana reactive X, ʻo ia hoʻi, impedance Z=R+JX.

 

ʻO ka loaʻa ʻana o ka mea reactive e hōʻemi i ka unuhi ʻana o ka mana hōʻailona mai ka antenna mai ka mea hānai. No laila, pono e hana ʻia ka ʻāpana reactive e like me ka mea hiki, ʻo ia hoʻi, ʻo ka impedance hoʻokomo o ka antenna e hana ʻia e like me ke kūpaʻa maʻemaʻe.

 

Therefore, an antenna matching unit is added between the antenna and the feeder.

 

If the impedance characteristic of the feeder is 50 Ω, by adjusting the antenna impedance, the imaginary part of the input impedance is small and the real part is close to 50 Ω within the required operating frequency range so that the input impedance of the antenna is Z=R=50 Ω, and good impedance matching between the antenna and the feeder is achieved. In actual testing, we generally use a vector network analyzer to measure impedance.

 

inner-structure-of-fmuser-medium-wave-am-antenna-tuning-unit.jpg

 

ʻO ke kumu o ka hoʻonohonoho ʻana i ka ʻāpana hoʻohālikelike antenna e hōʻemi i ka ratio hawewe kū, e hōʻemi i ka mana i hōʻike ʻia, e hoʻomaikaʻi i ka pono o ka hoʻouna ʻana, a i ʻole e hoʻomaikaʻi i ka pono o ka hoʻouna ʻana.

 

To adjust the AM antenna tuning unit, on the one hand, the antenna should be in a resonant state, and on the other hand, the impedance of the antenna should be matched with the transmission feeder after being transformed by the matching network.

 

ʻOiaʻiʻo, ʻo kahi antenna i hoʻolālā maikaʻi ʻia a i hoʻopaʻa ʻia e loaʻa mau kahi waiwai liʻiliʻi reactive i kona impedance komo.

 

Recommended AM Transmitter Antennas for Antenna Tuning Unit

 

Antenna FMUSER Pōkole (SW). pāʻoihana

E kipa no ka mea hou aku

Omnidirectional Quadrant Shortwave Antennas No ke kahua hoʻolaha AM ʻO FMUSER Nā Antenna Pōkole Pōkole FMUSER ʻO FMUSER Pōkole Nā Antenna Rotatable no ke kahua AM
Omin-quadrant SW Ant SW Omni-nui-fed Ant SW Rotatable Ant
ʻO FMUSER ʻO nā pale pale hiki ke hoʻololi ʻia i nā Antenna Pōkole no ke kahua AM Hoʻonohonoho ʻia ka pale FMUSER i nā hola 8/4/H Shortwave Antenna No ka hoʻolaha ʻana i ka AM ʻO FMUSER Cage Shortwave Antenna No ke kahua AM
SW mau pale pale hiki ke hoololi Nā Pākū SW HRS 8/4/H SW Cage Antenna
ʻO ka pākū FMUSER i nā hola 4/4/H Pōkole Antenna No ke kahua AM

Hoʻonohonoho ʻia ka pale FMUSER i nā hola 4/2/H Shortwave Antenna No ka hoʻolaha ʻana i ka AM
Hoʻonohonoho ʻia ka pale FMUSER i ka Hr 2/1/H No ke kahua hoʻolaha AM
Nā Pākū SW HRS 4/4/H
Nā Pākū SW HRS 4/2/H
Nā Pākū SW HR 2/1/H
ʻO nā pale pale Hr 2/2/H No ka hoʻolaha AM
ʻO FMUSER nā haʻina antenna transmitter pōkole - E kipa hou aku 
Nā Pākū SW HR 2/2/H

 

Hoʻokaʻaʻike i kā mākou poʻe loea

 

ʻO FMUSER Wave Medium (MW) Antenna pāʻoihana

E kipa no ka mea hou aku

ʻO FMUSER Omnidirectional Medium Wave Antenna no ka loaʻa ʻana o ka lekiō AM Antenna Wave Shunt Fed ʻO FMUSER Directional Medium Wave Antenna no ka hoʻolālā hale kiaʻi hoʻokahi
Loaʻa iā Omni MW Ant MW Shunt Fed Ant Kuhikuhi MW Ant

 

Noi mai no ka olelo

 

Why Antenna Tuning Unit is Important for Medium Wave Broadcasting?

 

ʻO ka ʻōlelo maʻamau, ʻo kahi kikowaena hawewe haʻahaʻa haʻahaʻa e pili ana i nā mea hoʻouna maʻamau maʻamau:

 

  • Pahu hānai paʻa keleawe
  • Nā mea hānai a me nā mea hoʻohui like ʻole
  • mea hoʻouna nalu waena
  • hale kiaʻi antenna hawewe
  • MW Antenna Dummy Load
  • Antenna matching unit

 

I waena o lākou, ʻo nā hana nui o ka antenna tuning unit:

 

  1. Kāohi manaʻo kiʻekiʻe-frequency
  2. Hoʻohālikelike impedance
  3. ʻO ka mālama uila

 

The equipment in the transmitter room includes brass hard feed pipes, various feeders and connectors, and medium wave transmitters, while the medium wave antenna tower and the AM antenna tuning unit are generally installed outdoors (the antenna adjustment network system can also be installed in inside the wave transmitter).

 

Antenna Tuning Unit is Born for the Changing MW Transmission Conditions

 

Due to the more stable environmental conditions, the maintenance of indoor equipment is relatively easy to carry out, while the maintenance of outdoor medium-wave transmission equipment is more difficult, especially the installation and commissioning of medium-wave antennas and ATU antenna tuning units - stemming from this work Most of them are carried out in an outdoor environment, so the working environment will be relatively poor and the maintenance difficulty factor will be relatively high.

 

In addition, with the development of the city, the antenna network is easily destroyed, the surrounding electromagnetic environment has become more complex, and the number of transmitters due to the failure of the antenna and feeder has also increased. The frequency of debugging networks has become more and more frequent than before.

 

The Antenna Tuning Unit is the Ultimate Network for a Transmitter Station

 

Pono e haʻi ʻia e pili pinepine ka impedance komo o ka antenna i kona ʻano geometric a me ke alapine o nā hawewe lekiō e hiki mai ana. Ma aneʻi, koi ʻia kahi pūʻulu o nā ʻāpana antenna e hoʻohālikelike i ka impedance hoʻokomo o ka antenna a me ka impedance hiʻohiʻona o ka mea hānai e hiki ai i ka hoʻopuka transmitter. Hiki ke hāʻawi ʻia ka mana kiʻekiʻe i ka antenna maʻamau.

 

At the same time, as the ultimate network of the transmitter system, the ATU antenna tuning unit is not only related to whether the transmitter can be turned on normally, but also to the quality and safety of the signal transmitted by the transmitter. Once it is difficult to repair the fault, it will cause the radio station to stop for a long time. broadcast (and in fact, this often happens), which will irreversibly damage the radio station's revenue.

 

A Good Maintenance of the Antenna Tuning Unit is Critical

 

The smooth installation, debugging, and protection of the antenna network system are very important for each launch station.

 

Ma muli o nā kūlana pahuhopu like ʻole, ʻaʻole hiki i ka lumi transmitter hawewe ma nā ʻāina he nui / ʻāina ke kūkulu i kahi lumi kūpono, a hiki ke hoʻohana wale i kahi pahu hoʻohālikelike. ʻO nā pono hoʻokomo pahu kūpono maʻamau:

         

  • Pono ka nui o ka pahu e kūpono i kahi e kau ai.
  • I ka stratifying i loko o ka pahu, e noʻonoʻo i ka nui o ka inductor i koi ʻia a ʻae ʻia e hoʻokomo.
  • Ma muli o ka lōʻihi o ka hana ma waho, pono e noʻonoʻo ʻia ʻo ka pahu pahu he wai ʻole, pale ahi, pale-pale, pale lepo, a paʻa.
  • ʻO ka nui o ke kaumaha o ka pahu e kūpono i ka hoʻokomoʻana a noʻonoʻo i ka amo o ka pou.
  • Pono e wehe ʻia ka puka pahu no ke ana ʻana a me ka debugging, a hiki ke wehe ʻia ka puka pahu ma mua a ma hope ke ʻae nā kūlana.

 

Eia naʻe, ʻo ka hoʻohana ʻana i nā pahu hoʻohālikelike e kaohi nui i ka helu o nā mea e kau ʻia. ʻAʻole nui nā ʻāpana a me nā wahi kau palena, a paʻakikī nā ʻāpana hoʻoili, e hoʻonui ai i ka paʻakikī o ka hoʻonohonoho ʻana, debugging, a me ka mālama ʻana.

 

Nā Huahana Manaʻo ʻia E hoihoi paha ʻoe iā ʻoe

FU-1000C FM transmitter 1000 watt mai FMUSER haʻahaʻa mana FM transmitter series a hiki i 1000 watts FU618F-10KW 10000 watt FM transmitter mai FMUSER kiʻekiʻe mana FM transmitter series a hiki i 10000 watts ʻO ka pūʻulu piha o FSN-1500T 1500 watt FM transmitter me ka antenna 8 bay FM dipole mai ka FMUSER FM transmitter packages series

 Hiki i 1000 Watts

Nā mea hoʻolele FM Power haʻahaʻa

Hiki i 10000 Watts

Nā mea hoʻolele FM mana kiʻekiʻe

Nā mea hoʻouna, nā antenna, nā kaula

Nā pūʻolo uila FM

ʻO nā pūʻolo lekiō 50W FM piha mai ka pūʻulu lekiō lekiō FMUSER FM ʻO ka STL package STL transmitter me ka mea hoʻokipa STL a me STL antenna mai FMUSER STL links series ʻO ka FM-DV1 8 bay FM dipole antenna me nā mea pono mai FMUSER piha ʻana i ka ʻōnaehana antenna FM

Keena lekiō, ke kahua hoʻolele

Lako Lekiō

STL TX, RX, a me ka antenna

Nā loulou STL

1 a 8 mau pūʻolo antenna FM

Pūnaehana Antenna FM

 

Antenna Tuning Unit: a Better pāʻoihana for Traditional Antenna Tuning

 

ʻAʻole hiki i ka mīkini hoʻopuka pūnaewele o nā transmitters kuʻuna ke hoʻokō i nā pono o kēlā me kēia lā

 

Me ka hoʻomohala wikiwiki ʻana o ka ʻenehana i ka ʻoihana hoʻolaha, ua hoʻopili mālie ka transmitter hawewe i kekahi mau ʻenehana hou, ʻaʻole ia e hoʻokō i nā koi hana o ka transmitter akā hoʻomaikaʻi nui i ka hana pono. Ma ke ʻano he huahana o ke au hou, loaʻa i ka all-solid-state medium wave transmitter nā pono o ka pale ʻana i ke kaiapuni a me ka hoʻohana haʻahaʻa haʻahaʻa.

 

I kēia manawa, ʻo ka medium wave broadcast transmitter ka mea i hoʻohana nui ʻia i ka ʻoihana hoʻolaha TV. Hoʻemi nui ia i ke kumukūʻai o ka mālama ʻana a me ka pale ʻana i ka transmitter a hoʻemi i ka hoʻohana ʻana i nā kumuwaiwai a me ka hana a nā limahana pili. kaumaha.

 

Pono e ʻōlelo ʻia ʻo kahi holomua nui i ka ʻenehana hoʻoili hawewe waena ʻo ia ka noiʻi a me ka hoʻohana ʻana i nā mea hoʻolaha hawewe uila holoʻokoʻa 10kw āpau. Ke hoʻohālikelike ʻia me ka transmitter hawewe waena mua, ua hoʻomaikaʻi maikaʻi ʻia ka hana pono o ka hāmeʻa a ʻoi aku ka maʻalahi o ka mālama ʻana, e hōʻoiaʻiʻo ana i ka hana maʻalahi o ka ʻōnaehana holoʻokoʻa.

 

Hoʻohana ka hoʻoponopono ʻaoʻao transmitter kuʻuna i ka ʻoihana hoʻopuka o ka mīkini e hoʻohālikelike i ka ʻoihana antenna detuned, ʻaʻole ia e hoʻonui wale i ka nalowale o ka lawe ʻana akā ʻaʻole hiki ke hōʻoia i ka hana maʻamau o ka mīkini.

 

ʻOiai ke hoʻohana nei ka mea hoʻouna hawewe uila holoʻokoʻa i kēia manawa i ka hoʻolālā circuit precision circuit, ua hoʻomaikaʻi ʻia nā koi no ke kaiapuni hana, a ua hoʻonui ʻia ka pale ponoʻī a me ka nānā ʻana o ka transmitter. Me kahi hoʻololi iki, e hoʻokuʻu pinepine ka transmitter i ka mana a i ʻole e pani ʻakomi.

 

An Unperfect Design of Medium Wave Transmitter

 

Eia kekahi, no ka mea, ʻaʻole maikaʻi ka mana anti-interference a me ka haʻahaʻa haʻahaʻa haʻahaʻa haʻahaʻa o ka metal oxide semiconductor field effect transistor i hoʻohana ʻia i ka mea hoʻouna hawewe uila holoʻokoʻa holoʻokoʻa, ʻaʻole hiki ke loaʻa ka hopena maikaʻi ʻole i ka pūnaewele antenna i ka wā o ka hana. .

 

Hiki paha i ka transmitter ke hoʻouna paʻa a hilinaʻi a hoʻokō i ka mana hoʻoili kiʻekiʻe loa e pili nui ʻia e ka hoʻolālā ʻana o ka antenna tuning unit.

 

Ua hoʻololi ka puka ʻana o ka ʻoihana adaptive i ka ʻōnaehana antenna-feeder kuʻuna me ka hoʻohālikelike a me ka detuning ma ka hopena transmitter. Ke hoʻololi ʻia ka impedance antenna me ka mahana a i ʻole ka haʻahaʻa, ʻo ka impedance komo o ka ʻoihana hoʻoponopono antenna e haʻalele mai 50Ω. Ma ka hoʻoponopono ʻana i ka ʻoihana adaptive, ua hoʻohālikelike ʻia ka impedance o ka antenna tuning unit i 50Ω, i mea e hōʻoia ai e loaʻa i ka transmitter ka hopena maikaʻi loa.

 

No ka mea ʻo ka ʻoihana adaptive kahi hoʻoponopono ʻole pili, ʻaʻole pili ka hoʻoponopono ʻana i ka hoʻolaha maʻamau o ka transmitter, a ʻaʻohe mea he paʻakikī a hiki ʻole ke hoʻoponopono ʻia ma hope o kekahi mau manawa o ka hoʻoponopono.

 

What is the Basic Structure of an Antenna Tuning Unit

 

Hoʻokumu ʻia ka ʻāpana hoʻopono antenna me kahi pūnaewele hoʻohālikelike, ʻākeʻakeʻa pūnaewele, absorption network, preset network, ʻōnaehana pale uila, a me nā ʻāpana ʻē aʻe.

 

I nā noi kūpono, no ka mea he kiʻekiʻe ka antenna hawewe haʻahaʻa, ua maʻalahi ia e ka uila a me ka electromagnetic environment. I mea e hōʻoia ai i ka palekana a me ka hana maʻamau o ka transmitter, e kau kekahi mau mea hoʻolako o ka pūnaewele antenna i nā pōpō hoʻokuʻu graphite ma ka puka o ka antenna no ka hoʻokuʻu. A i ʻole e hoʻohui i kahi pūnaewele pale a me ka ʻōnaehana pale uila i ka pūnaewele pili.

 

Matching Network of Antenna ATU

 

ʻO ke koʻikoʻi o ka noho ʻana o ka ʻupena hoʻohālikelike ʻo ia ka hana ʻana i ka mea hoʻolaha hoʻolaha medium-solid-state medium-wave broadcast transmitter a me ke kūpaʻa ʻano feeder e pili kokoke ana i hiki iā ia ke ʻike i nā hoʻonohonoho pūnaewele i ke kūlana kūlike. ʻAʻohe hopena o ka pūnaewele pili i ka hana maʻemaʻe o ka mea hoʻolele hoʻolaha medium-solid-state. hopena hoʻemi ʻia.

 

The antenna matching unit is a network set for seamless connection between the transmitter of the medium wave transmitter and the characteristic resistance of the feeder, and the network is set in a matching state so that the entire transmitter of the medium wave transmitter can be in a good operation state.

 

ʻO ke kumu o ka hoʻohui ʻana i kahi pūnaewele pili i ka ʻōnaehana feeder antenna e hana i ka impedance o ka antenna a me ka impedance o ka mea hānai e like a like paha. ʻEkolu mau ʻano o ka ʻupena pili: ʻano Γ, ʻano T, a me ke ʻano Π, a ua māhele ʻia ke ʻano Γ i ke ʻano Γ maikaʻi a me ke ʻano Γ hoʻohuli.

 

He mea maʻalahi ka Γ-like network, me ʻelua wale nō (ʻelua pūʻulu), kahi inductor, a me kahi capacitor. Ma ke kumumanaʻo, hiki i ka pūnaewele Γ-like ke hoʻohālikelike i kekahi impedance i ka impedance e pono ai mākou. ʻO ka pūnaewele Π-shaped he ʻekolu mau ʻāpana, a ʻo ka inductance a i ʻole capacitance o ka lima series i manaʻo ʻia ʻo ka hui pū ʻana o ʻelua inductances a i ʻole capacitors, a laila hiki ke manaʻo ʻia ke ʻano Π-like me ke ʻano pili o kahi Γ inverted a me kahi. ʻupena Γ maikaʻi. Ma ka hoʻolālā maʻamau, pono e koho i kahi ʻano me kahi ʻano maʻalahi e like me ka hiki ke hoʻomaʻamaʻa i ka debugging. Ke hoʻokomo ʻia ka impedance o ka antenna ʻo R Z0 (feeder impedance), koho ʻia ke ʻano Γ i hoʻohuli ʻia.

 

He mea maʻalahi ka Γ-like network, me ʻelua wale nō (ʻelua pūʻulu), kahi inductor, a me kahi capacitor. Ma ke kumumanaʻo, hiki i ka pūnaewele Γ-like ke hoʻohālikelike i kekahi impedance i ka impedance e pono ai mākou. ʻO ka pūnaewele Π-shaped he ʻekolu mau ʻāpana, a ʻo ka inductance a i ʻole capacitance o ka lima series i manaʻo ʻia ʻo ka hui pū ʻana o ʻelua inductances a i ʻole capacitors, a laila hiki ke manaʻo ʻia ke ʻano Π-like me ke ʻano pili o kahi Γ inverted a me kahi. ʻupena Γ maikaʻi. Ma ka hoʻolālā maʻamau, pono e koho i kahi ʻano me kahi ʻano maʻalahi e like me ka hiki ke hoʻomaʻamaʻa i ka debugging. Ke hoʻokomo ʻia ka impedance o ka antenna ʻo R Z0 (feeder impedance), koho ʻia ke ʻano Γ i hoʻohuli ʻia.

 

Blocking Network of Antenna ATU

 

ʻO ke kumu i loaʻa ai kahi pūnaewele paʻa ʻana ʻo ka antenna hoʻouna o ke kikowaena hawewe haʻahaʻa haʻahaʻa he ʻano o ka pānaʻi.

 

In essence, the antenna matching unit belongs to both the transmitting antenna and the receiving antenna, and generally, the transmitting station does not have only one transmitting antenna and frequency, so the antenna is prone to high-frequency feedback, and the high-frequency signal nearby is received in the reverse direction. In the mixing room, the high-frequency voltage is reversely transmitted to the transmitter through the antenna network and feeder. With the influx of high-frequency voltage, the waveform will inevitably change, the quality of the transmitted signal will be reduced, and it will also affect the transmitter. Equipment and security play out.

 

Hoʻopau ka ʻupena hoʻopaʻa i ka hoʻopili like ʻana ma waena o nā kaapuni ʻelua-frequency a hoʻomaikaʻi i ka maikaʻi o ka hoʻopuka hōʻailona ma o ka pilina like ʻana o nā kaapuni resonant.

 

I ka hōʻuluʻulu ʻana, ʻo nā hopena o ka pale ʻana i ka pūnaewele:

 

  • ma o keia hoailona alapine
  • Kāohi i nā hōʻailona alapine ʻē aʻe

 

Ke hala i ka hōʻailona o kēia alapine, ʻaʻole nui ka impedance. I ka pale ʻana i ka hōʻailona o kahi alapine ʻē aʻe, ʻaʻole pono e hōʻike ʻia kahi impedance nui ma ke alapine ʻē aʻe, akā pono e hōʻike ʻia kahi impedance nui ma ka ʻaoʻao o luna a me lalo o nā alapine ʻē aʻe, e kāohi ana i ka alapine pono ʻole. alapine.

 

Pūnaehana Absorption of Antenna ATU

 

ʻO ke koʻikoʻi o ka noho ʻana o ka ʻupena absorption ʻo ia ka hōʻemi ʻana i ka piʻi ʻana o ka volta o ke kaapuni a pale i ka overvoltage ma nā ʻaoʻao ʻelua o ka capacitor mai ka hōʻino ʻana i nā mea hana a hana i nā hemahema.

 

Pūnaewele i hoʻopaʻa mua ʻia of Antenna ATU

 

ʻO ka pūnaewele pre-adjustment e hoʻohālikelike i ka impedance antenna, ka mea nui ma ka hoʻohui ʻana i kahi inductance ma lalo o ka antenna a me ka impedance antenna e like me ka hana ʻana i kahi ʻāpana kūpono o ka reactance e hoʻomaʻamaʻa i ka hoʻolālā a me ka debugging o ka pūnaewele pili.

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