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Zelfbouwantenne voor ontvangst op 1090 Mhz met DVB-T stick
04-16-2013, 05:54 AM, (Dit bericht is het laatst bewerkt op 01-06-2014, 11:06 PM om {2} door on4cbn.)
#2
RE: Zelfbouwantenne voor ontvangst op 1090 Mhz met DVB-T stick
(02-21-2013, 09:48 PM)on4cbn schreef: Heb nu het de zelfbouwantenne voor 1090 Mhz die we vrijdag hebben uitgemeten, in een PVC buis gestopt en buiten opgesteld.
De antenne staat amper 5 meter boven de grond, ik zit slechts op 18 meter boven de zeespiegel.
Dankzij Jan ON5YK zit er ook een inline-sat preamp tussen.
We gebruiken gewone sat-coax. Die voldoet prima op 1Ghz.
Deze opstelling is een tijdelijk experiment.

De eerste vastelling is bijzonder positief.
Ik zie nu vliegtuigen op meer dan 300 Km afstand !

Als mijn PC opstaat kan je dat op deze link bekijken :

http://on4cbn.no-ip.org:8205/VirtualRadar/GoogleMap.htm

Nieuwe versie Virtual Radar Server (gebruik Google Chrome)
http://on4cbn.no-ip.org:8205/VirtualRadar/desktop.html


Hier zie je het originele antenneken in de dakkoepel geplakt, met de buiten-opstelling op de achtergrond.

[Afbeelding: 1090Mhz_koepel.jpg]

De buiten PVC antenne in een tijdelijke opstelling :
( ja, dat vroegere ATV-mastje ernaast staat al te lonken ....)

[Afbeelding: 1090Mhz_dak.jpg]

Originele ontwerp van deze antenne :

[Afbeelding: 1090_ant_02.JPG]
Een andere uitvoering met iets andere afmetingen :

[Afbeelding: myAnt_v1_specs.jpg]

Resultaten met SBS-plotter op dezelfde schaal :

ADS-B ontvangst-plot met het bijgevoegde DVB-T antennetje in dakkoepel (3 meter boven de grond)
verste afstand : 109.5 Nautical Miles = 203 Km

[Afbeelding: plot_original.jpg]

Nu met de zelfbouwantenne op 5 meter hoogte + preamp :
Voorlopig verste : 179.3 Nm = 332 Kilometer

[Afbeelding: plot_zelfbouw.jpg]

Oorzaak van de minder goede resultaten in het zuiden :
Ons huis staat in de weg...

Groeten,
Guy
Guy,
Is er verschil in kwaliteit tussen het model met radialen en die met de schijf?
Ik heb vandaag wat materiaal gaan kopen en zou er morgen op mijn werk aan beginnen.
Die met de schijf is qua lengte iets korter?
Verder heb ik nog wat vragen:
Hoe maak je die spoelen in de antenne juist?
Hoe dik zijn de spoelen ( tussen begin en einde ) afstand staat niet op het schema.
Staan die spoelen in het center van de antenne? (Kern in het midden)
3 carré bestaat niet dus het is 2.5 of 4. Ik zou eens testen met 4 carré.
Sorry voor de domme vragen maar ‘k ken meer van computers dan van antennes :-)

Alvast bedankt,
Franky


Berichten in deze discussie
RE: Zelfbouwantenne voor ontvangst op 1090 Mhz met DVB-T stick - door DigiSol - 04-16-2013, 05:54 AM

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