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Antene Antene de toate tipurile, pentru internet wireless, satelitare si nu numai...


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Old 14.12.2009, 18:23   #1
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Default Antena tub 10-15 dbi-wireless internet 2,4Ghz

Asta este cea mai simpla antena-Antena conserva ca nu stiu cum sa o numesc cu un randament destul de bun,iar daca o montati in parabolica are un randament excelent.

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puteti gasi mai multe detalii aici http://foro.seguridadwireless.net/an...on-de-antenas/
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Old 24.12.2009, 20:11   #2
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Default Re: Antene internet wireless

Proiect de sarbatori,antena omnidirectionala de 12..15 db.Am vazut multe sceme in internet dar am ales una facuta de spaniolii mei si copiata dupa un site rusesc.Antena e buna pentru a capta semnale in 360 grade...asta inseamna multe retele,si daca merge cu un cistig de 12 db cu siguranta se pot face conexiuni in 2..3 km distanta.Maine aduc pozele si rezultatele.
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Old 25.12.2009, 20:36   #3
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Default Re: Antene internet wireless

Cit poate sa schimbe un mic aparat..

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fara adaptor wireless vad 15 retele wireless dintre care numai 11 active,adica la care ma pot conecta

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asta este cu adaptor de 500 mw,si deja sa triplicat numarul de retele pe care le vad,si puterea semnalului receptionat sa dublat.Toate masuratorile au fost realizate in casa,fara nici un fel de antena,doar cu cea care insoteste aparatul,de 2 dbi.Trebuie sa fac probe cu parabolica de 25..30 dbi.
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Old 05.01.2010, 15:09   #4
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Default Re: Antene internet wireless

Antena pringles.19 dbi

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Old 05.01.2010, 20:53   #5
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Default Re: Antene internet wireless

Ce bine arata Detalii despre ea ai?
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Old 05.01.2010, 21:04   #6
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Default Re: Antene internet wireless

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Originally Posted by XVanish View Post
Ce bine arata Detalii despre ea ai?
Bineinteles!...pina maine sint gata.Stii cum e,poze,upload,link,..au inceput sa ma plictiseasca un pic atitea manevre ca sa pot posta citeva poze.
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Old 05.01.2010, 21:10   #7
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Default Re: Antene internet wireless

Pai pozele si cate una alta le poti atasa si aici pe forum.
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Old 06.01.2010, 02:26   #8
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Default Re: Antene internet wireless

Antena este construita din tub de cartofi prajiti,este din carton cu aluminiu prin interior.
-usb-ul wireless care este bagat in el este unul normal fara mofturi,fara amplificare si este conectat cu cablu la calculator.
Surubul este de 3..4 mm diametru iar seibile mici sint doar ca suport nu sint necesare.
-de retinut ca are un cistig de 15 db fara sa fie montata ca lnb intr-o parabolica si se poate conecta cu ea la 2 km in linie dreapta fara probleme

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Old 06.01.2010, 12:26   #9
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Default Re: Antene internet wireless

Practic discurile alea sunt tot saibe dar mai mari, de 3 cm, corect?

Stick-ul ala wireless cum il pozitionez in interior-ul cilindrului, unde vine pozitionat mai exact si care sunt dimensiunile?
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Old 06.01.2010, 12:40   #10
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Default Re: Antene internet wireless

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Originally Posted by XVanish View Post
Practic discurile alea sunt tot saibe dar mai mari, de 3 cm, corect?

Stick-ul ala wireless cum il pozitionez in interior-ul cilindrului, unde vine pozitionat mai exact si care sunt dimensiunile?

Poza era o pagina mai in spate.Distanta de la fundul cutiei este de vreo 4,5 cm,dar in mod normal se calculeaza in functie de lungimea acestuia.Nu am pus metoda de calcul ca sa nu se sperie lumea,dar nu este grea deloc.
Iar stickul se introduce inauntru in functie de cit este de mare,si iar nu am pus dimensiuni pentru ca nu stiu ce stickuri au oamenii.
Cine vrea sa fabrice antena sa intrebe...in functie de materialele care le au ei...
Toate saibele sint de 3 cm,dar se poate experimenta cu diferite marimi.
Ca sa se inteleaga cit mai bine...lungimea,diametrul,forma(patrat,romb,etc)ca re se da directorilor antenei,poate oscila de la 1,5cm pina la 6cm.Depinde de material..tabla...sirma..tabla de cupru...sau de aluminiu..etc,

In plus este bine de stiut ca 2,4 Ghz contine 14 canale wireless ceea ce inseamna o variatie a antenei,in functie de canalul in care se doreste receptionarea.
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Old 06.01.2010, 12:52   #11
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Default Re: Antene internet wireless

Ok, deci nu are rost sa discutam exact unde si cum vine stick-ul pentru ca difera de la caz la caz... am inteles.
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Old 06.01.2010, 13:00   #12
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Default Re: Antene internet wireless

Da,difera de la caz la caz si de tipul de materiale.Sa faci un manual precis ar lua foarte mult timp si ar fi irelevant,pentru ca daca cineva schimba materialul si in loc de tabla de aluminiu cu grosimea de 1mm foloseste tabla zincata de 2mm atunci toate datele se schimba.

Ce este interesant rezuma din cele 14 canale wireless,si adica..orice dimensiuni ai da antenei,cuprinse intre cele expuse in materialul de mai sus,antena va receptiona semnal din toate cele 14 canale,numai ca,pe unul dintre canale va avea calitate superioara,sau putere superioara.
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Old 08.01.2010, 06:35   #13
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Default Re: Antene internet wireless

salut...Kittmask...pozele puse de tine ....cele cu antena tub .....nu este una si aceeasi ca in poze nu sunt la fel???? prima e cu un surub mai lung ....si a doua cu ala de 140 mm....daca sunt diferite care ar merita sa o incerc????
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Old 08.01.2010, 08:35   #14
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Default Re: Antene internet wireless

Una este simpla si cealalta este dubla.Poti face cu un tub sau cu doua lipite.Cu cit este mai lunga cu atita este cistigul mai mare.Eu as incepe cu antena biquad,care dupa parerea mea este cea mai simpla si cea mai buna dintre toate.
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Old 08.01.2010, 08:48   #15
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Default Re: Antene internet wireless

da am inteles...poti sa-mi dai detalii cu privire la constructia biquad .....m-ar ajuta mult...multumesc
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Old 08.01.2010, 20:04   #16
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Default Re: Antena tub 10-15 dbi-wireless internet 2,4Ghz

O alta antena tub si cablul aferent,plus placa retea.
Sirma care este antena propriuzisa are 3 cm si este din cupru.

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Old 28.04.2010, 00:06   #17
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Default Re: Antena tub 10-15 dbi-wireless internet 2,4Ghz

Cu ce ai dat gaura aia asa de perfecta?
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Old 29.04.2010, 07:00   #18
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Default Re: Antena tub 10-15 dbi-wireless internet 2,4Ghz

Cu un burghiu ascutit special pentru tabla subtire.
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Old 09.05.2010, 10:30   #19
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Default Re: Antena tub 10-15 dbi-wireless internet 2,4Ghz

Pentru a fi perfect construita pe 2.4 GHz, diametrul trebuie sa fie de 83mm,iar lungimea peste 180mm,cu cat e mai mare cu atat e mai directiva, eu am gasit doua cuti de compot pe care le-am lipit, sa aveti grija sa ii montati mufa de 50 ohm, are importanta.
E bunicica antena in raport cu simplitatea ei dar sa stiti ca e foarte directiva , castigul: 10-12 dBi
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Old 09.05.2010, 11:19   #20
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Default Re: Antena tub 10-15 dbi-wireless internet 2,4Ghz

Pentru a da sfaturi va trebui sa faci demonstratii practice,in care sa detaliezi orice amanunt.
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