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J poto timoun (J-Pol) atanta ayeryen koupe pa vag nan yon Yuan 1 / 2 (yon pati nan graf dwat A) matche avèk kondwi nan vag nan yon aplike 1 / 4 (yon pati nan graf dwat B) fòm, li se egal nan valè a soti nan ekstrèm kondwi detanzantan ayeryen trè, paske nan kondiktè li yo montre J modèl, rezon ki fè apèl J pitit poto. Graf Dwa se J la ke ak antèn nan liy 300 televizyon omik nan plat fè yon prezan nan fè trè ayeryen timoun (aplike nan 30W sa ki annapre yo, J lèn abrevyasyon trè pitit ayeryen).
Lèn J trè ayeryen pitit te fè fasil, fasilite pote, fasilite kache rete tann pou yon karakteristik. Entwodwi li nan fè mouvman an detay pi ba a:
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tanpri Klike la a jwenn antèn dipol nou
Graf Next yo lèn J trè pitit foto a egzanp nan ayeryen. A se pendan tout la ayeryen nan ki wo kwen, B, C, D se detay nan elaji foto nan antèn ki konsène yo. |
tanpri Klike la a jwenn antèn dipol nou
Lèn J trè pitit ayeryen ka Furl tankou graf sa yo vini, fasilite pote. |
Paramèt enpòtan ki dekri efikasite ayeryen se kanpe vag konpare (SWR), kanpe vag konpare plis adjasan 1 pi bon; Vag nan 1 delege reflèks se 0, vag kanpe konpare <1.6 (korespondan pouvwa a nan 5% se reflèks retounen) te comparatived, kanpe vag se konpare> 2.5 (korespondan pouvwa a nan 20% se reflèks tounen) lè risk ki gen pouvwa emisyon se twò gwo ak boule-soti emeteur.
Kanpe vag rezilta pouvwa pase ka mezire yon mont souvan nan menm tan an (Forward pouvwa), avèk anpil pouvwa refleksyon (reflete pouvwa), paske sa a se jeneral, rele radyo frekans dinamometrik ankò (RF mèt pouvwa). Graf Next yo se foto a nan dinamometrik nan yon kalite frekans radyo; se Catapult nan mete fen TX nan dèryèr outputted, antèn revokasyon ANT oswa fo chaj (ki sa graf pwochen resevwa se chay fo).
Nou itilize dekapite move lespri sou yon lans a wòch fè sous siyal, pouvwa emisif li yo deplase 93MHz, J a lèn ki pral abstrenn pa metòd pi wo a trè timoun vle di ayeryen pann nan sousòl (nan lòd yo diminye aleka pouvwa emisif), longè a yo kwè ke chanjman C mezire kanpe nan vag ayeryen yo konpare. Apre w fin chanje C nou menm tou nou ajiste yon wout distribisyon Catapult fè pouvwa pwodiksyon li pi gran an nan menm tan an. Fè anba a rezilta eksperimantal nou an:
C (cm) | Pouvwa Sòti (W) | Reflect pouvwa (W) | Kanpe vag konpare |
24 | 4.8 | 1.7 | 3.8 |
21 | 5.2 | 1.0 | 2.6 |
18 | 5.0 | 0.8 | 2.3 |
15 | 6.0 | 0.3 | 1.6 |
12 | 4.0 | 1.0 | 3.0 |
9 | 2.8 | 1.5 | 5.8 |
tanpri Klike la a jwenn antèn dipol nou
lòt pwodwi nou an:
Pwofesyonèl pakè ekipman estasyon radyo FM
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Antre nan imèl yo ka resevwa yon sipriz
es.fmuser.org
it.fmuser.org
fr.fmuser.org
de.fmuser.org
af.fmuser.org -> Afriken
sq.fmuser.org -> Albanyen
ar.fmuser.org -> Arab
hy.fmuser.org -> Armenian
az.fmuser.org -> Azerbaydjan
eu.fmuser.org -> Basque
be.fmuser.org -> Belarisyen
bg.fmuser.org -> Bulgarian
ca.fmuser.org -> Katalan
zh-CN.fmuser.org -> Chinwa (senplifye)
zh-TW.fmuser.org -> Chinwa (Tradisyonèl)
hr.fmuser.org -> Kwoasyen
cs.fmuser.org -> Czech
da.fmuser.org -> Danwa
nl.fmuser.org -> Olandè
et.fmuser.org -> Estonyen
tl.fmuser.org -> Filipino
fi.fmuser.org -> Finnish
fr.fmuser.org -> Franse
gl.fmuser.org -> Galisyen
ka.fmuser.org -> Georgian
de.fmuser.org -> Alman
el.fmuser.org -> Greek
ht.fmuser.org -> Kreyòl ayisyen
iw.fmuser.org -> ebre
hi.fmuser.org -> Hindi
hu.fmuser.org -> Hungarian
is.fmuser.org -> Icelandic
id.fmuser.org -> Endonezyen
ga.fmuser.org -> Ilandè
it.fmuser.org -> Italyen
ja.fmuser.org -> Japonè
ko.fmuser.org -> Koreyen
lv.fmuser.org -> Latvian
lt.fmuser.org -> Lithuanian
mk.fmuser.org -> Masedwan
ms.fmuser.org -> Malay
mt.fmuser.org -> Maltese
no.fmuser.org -> Norwegian
fa.fmuser.org -> Pèsik
pl.fmuser.org -> Polonè
pt.fmuser.org -> Pòtigè
ro.fmuser.org -> Romanian
ru.fmuser.org -> Ris
sr.fmuser.org -> Sèb
sk.fmuser.org -> Slovak
sl.fmuser.org -> Slovenian
es.fmuser.org -> Panyòl
sw.fmuser.org -> Swahili
sv.fmuser.org -> Syèd
th.fmuser.org -> Thai
tr.fmuser.org -> Tik
uk.fmuser.org -> Ikrenyen
ur.fmuser.org -> Oudou
vi.fmuser.org -> Vietnamese
cy.fmuser.org -> Welsh
yi.fmuser.org -> Yiddish
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