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Author Topic: Antenna for my Car alarm System  (Read 663 times)
ahlburuto
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« on: January 03, 2010, 07:26:34 PM »

Guys anu kayang magandang antenna para dito? Para mapahaba ko ang range nung transmitter. ANg lapit laang kasi eh. Nasa 15-20ft laang ang distance nya. Kinabit ko kasi sa house ko yung alarm module para sa automation ko ng ilaw. Ang problema lang eh yung distance ng remote. Me pag asa ba na mapalayo yung range nya?

TIA

BR
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The Philippine Electronics and Technology Forum
« on: January 03, 2010, 07:26:34 PM »

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ahlburuto
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« Reply #1 on: January 04, 2010, 07:53:47 AM »

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ahlburuto
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« Reply #2 on: January 06, 2010, 09:41:31 PM »

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bravokilo
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« Reply #3 on: June 20, 2010, 09:38:11 PM »

ahlburutu:

     malamang UHF yan at maselan ang antenna sa high f. nasusuinog and finals sa TX. Yuing ra RX mas passive. Yan  ang reason na yung mga FRX sa 430Megs have fixed antennas to prevent experimentation.  The solution is to raise the entire RX sa taas ng bahay mo or sa windo, naka expose cya.  Yung line for the contact lang ang hahabain mo. Dun sa FRX transceiver na sinasabi ko, tinataas namin boung unit and binababa ang mic and speaker lines na ausio na lang ito. Sa 2 mter for example, coax ginagamit to extend the antenna to the outside. RF section yun which is not practical sa UHF.

BK 0922 281 0680
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