antenna

  1. ab cd

    CoCo Antenna - 2, 4, 6, 8 & 12 Elements - Simulation Results

    Simulation results show that CoCo is a High Gain, High Impedance/High SWR Antenna. Due to its high SWR, an impedance matching device is required to be incorporated in the feed coax (i.e. between CoCo and Receiver) to bring down SWR to 1.5 or less, in order to fully utilize the high gain of CoCo...
  2. ab cd

    Franklin-Spider Antenna (for advanced users)

    SIMULATION RESULTS Gain = 3.7 dBi SWR = 3.1 Impedance = 155 - j 8.18 ohms HIGH IMPEDANCE/SWR - WILL NOT GIVE GOOD RESULTS WITHOUT IMPEDANCE MATCHING IMPEDANCE MATCHING BY "TRANSMISSION LINE+CAPACITOR" TECHNIQUE Using Smith Chart: Capacitor to be inserted = 3.8 pF (4 pF will do) Coax length...