DIY ndi FM Radio Dipole Antenna | FMUSER BROADCAST

 Mlongoti wa dipole wa FM ndiye mtundu wosavuta komanso wokulirapo wa mlongoti, kotero ndikosavuta kuti aliyense adzipangire yake, yomwe imangofunika zida zosavuta. ndi DIY FM dipole antenna ndichisankho chothandiza komanso chotsika mtengo ngati wailesi yanu ikufuna mlongoti wosakhalitsa. Nanga bwanji DIY ndi FM dipole antenna? Nkhaniyi ikuuzani.

Kodi An FM Dipole Antenna Ndi Chiyani?

Ndikofunika kumvetsetsa mwachidule mlongoti wa dipole wa FM musanayambe kupanga yanu. Pankhani yamawayilesi ndi matelefoni, mlongoti wa dipole wa FM ndiye mtundu wogwiritsidwa ntchito kwambiri komanso wosavuta. Ili ndi mawonekedwe owoneka bwino: amawoneka ngati mawu oti "T", omwe amapangidwa ndi ma conductor awiri okhala ndi kutalika kofanana ndi kumapeto mpaka kumapeto. Mapazi awo amalumikizidwa ndi chingwe. Chingwecho chikhoza kukhala chingwe chotseguka, chingwe chawiri, kapena chingwe cha coaxial. Dinani apa

Zindikirani kuti balun iyenera kugwiritsidwa ntchito mukamagwiritsa ntchito chingwe cha coaxial chifukwa chingwe cha coaxial ndi mtundu wa chingwe chosakhazikika koma mlongoti wa dipole wa FM ndi mtundu wa mlongoti wokhazikika. Ndipo balun akhoza kuwapanga kuti azigwirizana wina ndi mzake.

Muyenera kukonzekera zida zopangiranso mlongoti wa dipole wa FM. Nthawi zambiri amakhala:

• Twin flex - Twin mains flex ndi yabwino, koma mutha kuyisintha ndi mawaya ena, monga mawaya olankhula akale, bola kukana kwawo kuli pafupi ndi 75 ohms.
• Kukulunga - Imagwiritsidwa ntchito kuteteza pakati pa mlongoti wa dipole wa FM ndikuletsa kusinthasintha kuti zisatseguke kupitirira zomwe zikufunika.
• Chingwe kapena twine - Amagwiritsidwa ntchito kuteteza malekezero a dipole antenna ya FM mpaka pamalo ena (ngati pakufunika).
• Zolumikizira - Zimagwiritsidwa ntchito polumikiza mlongoti wa FM ku chingwe cha coaxial.

Zida izi zitha kupezeka m'moyo wanu watsiku ndi tsiku. Mutha kugwiritsanso ntchito zomwe zapezeka mulu wa zinyalala kupanga VHF FM radio dipole antenna.

Kenako pamafunika kuwerengera kutalika kwa mlongoti wa dipole wa VHF FM. Mutha kuwerengera motengera fomula iyi:

L = 468 / F : L imatanthawuza kutalika kwa mlongoti, kotero kutalika kwa woyendetsa kuyenera kugawidwa ndi 2. F ndi maulendo ogwira ntchito mu MHz. Izi zili pamwambazi zikakonzeka, mutha kuyamba kupanga tinyanga.

Ndiosavuta kupanga mlongoti wamba wa VHF FM, womwe umangofunika masitepe anayi osavuta. Tsatirani malangizo pansipa!

• Kulekanitsa chingwe - Kulekanitsa mawaya awiri otsekeredwa a chingwe.
• Konzani malo apakati - Mukukumbukira kutalika kwa kondakitala wanu? Tiyerekeze kuti ndi 75 centimita. Kondakitala akatalika 75 cm, amasiya kulekanitsa mawaya. Ndiye kumanga pakati ndi tayi Manga pa nthawi ino. Ndipo apa ndiye pakatikati pa FM dipole antenna.
• Sinthani kutalika kwa kondakitala - Ndiye mutha kusintha kutalika kwa woyendetsa pang'ono. Chifukwa pali zinthu zambiri zomwe zimakhudza nthawi zonse mu ndondomeko ya kutalika kwa kondakitala, sizingatheke kukhala zolondola nthawi iliyonse. Ngati mukufuna ma frequency opangira apamwamba, mutha kufupikitsa kutalika kwa kondakitala pang'ono.
• Konzani mlongoti - Pomaliza, mangani mfundo kumapeto kwa waya kuti muthe kukonza mlongoti ndi mawaya opotoka. Mukayika mlongoti wa dipole wa FM, samalani kuti mukhale kutali ndi zinthu zachitsulo, kapena kulandila kwa siginecha kuchepetsedwa. 

Cholandila cha VHF FM chitha kugwiritsidwa ntchito ngati mawonekedwe a 75-ohm ndi mawonekedwe a 300-ohm. Mlongoti wa dipole wa FM womwe uli pamwambapa ndi woyenera mawonekedwe a 75-ohm. Ngati mukufuna kugwiritsa ntchito mawonekedwe a 300-ohm, mutha kuyesa njira ziwiri:

1. Lumikizani mlongoti wanu wa DIY 75-ohm dipole ndi chingwe coaxial ndi balun
2. Gulani chingwe cha 300 ohm FM pa intaneti ndikupanga mlongoti wa dipole wa 300-ohm mofanana ndi kupanga 75-ohm dipole antenna.

Ndizodziwika kuti zimangolimbikitsidwa kugwiritsa ntchito dipole antenna ya DIY FM pawailesi yanu kapena wolandila mawu. Ngati mukufuna mlongoti wa wailesi ya FM, chonde gulani mlongoti waukadaulo wa FM kuchokera kwa akatswiri opanga zida zamawayilesi, monga FMUSER.

Kodi Balun Kwa Dipole ndi Chiyani?

Mfundo ya Baron ndi yofanana ndi ya transformer. Balun ndi chipangizo chamagetsi chomwe chimasintha pakati pa chizindikiro chokhazikika ndi chizindikiro chosagwirizana, kapena mzere wa chakudya. 

Ndiyenera Kugwiritsa Ntchito Liti Balun ya Antenna?

Mabanki amagwiritsidwa ntchito m'malo ambiri kuti asinthe pakati pa zochitika zoyenera ndi zosagwirizana: gawo limodzi lofunikira ndi ma frequency a wailesi, kugwiritsa ntchito kwa RF kwa tinyanga. Mabalance a RF amagwiritsidwa ntchito ndi tinyanga zambiri ndi ma feeder awo kuti asinthe chakudya choyenera kapena mzere kukhala wosakhazikika, Popeza dipole antenna ndi mlongoti wokhazikika komanso chingwe cha coaxial ndi chingwe chosakhazikika, chingwe cha coaxial chiyenera kugwiritsa ntchito balun kusintha coaxial. chingwe mu chingwe choyenerera.

Ndi Mitundu Yanji Yosiyanasiyana ya Ma Dipole Antennas a FM?

Pali mitundu inayi yayikulu ya tinyanga za dipole za FM:

• Half-wave dipole antenna
• Multi half-wave dipole antenna
• Mlongoti wa dipole wopindidwa
• dipole yayifupi 

Ndi Wodyetsa Wotani Best FM Dipole Antenna ? Ndi Njira Yanji Yodyetsera Yabwino Kwambiri?

Mlongoti wa dipole ndi mlongoti wokhazikika, chifukwa chake muyenera kugwiritsa ntchito chakudya choyenera, chomwe ndi chowona m'malingaliro. Komabe, chakudya chopatsa thanzi sichimagwiritsidwa ntchito kawirikawiri chifukwa ndikovuta kugwira ntchito m'nyumba ndipo chimagwira ntchito ku gulu la HF. Zingwe zambiri za coaxial zokhala ndi balun zimagwiritsidwa ntchito.

Mlongoti wa FM dipole antenna amagwiritsidwa ntchito kwambiri pamawayilesi osiyanasiyana amawayilesi, ngati wailesi ya FM chifukwa cha kuphweka, kuchita bwino, komanso kutsika mtengo. Koma ngati mukufuna kupanga wailesi, kupeza wodalirika wothandizira zida za wailesi akadali chisankho chanu chabwino. FMSUER ndi katswiri komanso wodalirika wogulitsa zida zowulutsira pawailesi ndi mayankho, kuphatikiza ma transmitters otsika mtengo komanso otsika mtengo a FM omwe amagulitsidwa, ofanana ndi ma dipole antennas ogulitsa, ndi zina zotero. Ngati mukuyang'ana izi, chonde omasuka kulankhula nafe!