antenna for qam-tx1-433 and qam-rx2-433

Discussion in 'Wireless & RF Design' started by majoka, Sep 11, 2009.

  1. majoka

    Thread Starter New Member

    Sep 10, 2009
    hi i am using qam-tx1-433 and qam-rx2-433 for rf link to send data. i am using pic16f690 . what should be the antena size and shape that these both modules compatiable to each other anteena should be omnilidirection i want to cover a distance range of almost 4 to 5 meter or can say with in a room
  2. Papabravo


    Feb 24, 2006
    A quarter wave end fed vertical antenna should get you started. You know that frequency times wavelength must be equal to the speed of light. The frequency is 433 MHz., and the speed of light is 3e8 meters/second. The wavelength should be close to 70 cm. Divide that by 4 to get 17.5 cm