Boosting range of wireless transmission using RF module 433mhz

Discussion in 'The Projects Forum' started by Irfaaz Ali, Aug 16, 2015.

  1. Irfaaz Ali

    Thread Starter New Member

    Aug 16, 2015
    2
    0
    Hi

    Im trying to increase the distance of transmission for my wireless circuit, Im currently using an RF module (433mhz) and im getting around 30meters im trying to get at least 50 to 100 meters. is there anything i could do to achieve this ? thanks
     
  2. MikeML

    AAC Fanatic!

    Oct 2, 2009
    5,450
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    Better antennas on both the transmitter and receiver.

    The minimum antenna configuration for both is a half-wavelength center-fed dipole (not a 1/4 wavelength, or shorter piece of wire with no ground plane or counterpoise). The transmit antenna and receive antenna must have the same orientation, either both vertical or both horizontal; cross-orientation is a no-no.

    Even better would be Yagi beam type antennas...

    What are you using for a signalling protocol?
     
  3. TheButtonThief

    Active Member

    Feb 26, 2011
    219
    38
    You could try increasing the voltage supplied to the transmitter, though check your data scheet for the module's max Vcc (probably 12V if you're using the 433Mhz "ebay" pair)
     
  4. Irfaaz Ali

    Thread Starter New Member

    Aug 16, 2015
    2
    0
    I'm trying to fit my circuit into a watch so im not sure how to fit my antenna onto my watch?
     
  5. MikeML

    AAC Fanatic!

    Oct 2, 2009
    5,450
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    Best you can do is to use the entire wrist band to make a shorted dipole. You cannot use a very compromised antenna and expect good range...
     
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