Custom Antennas Frequencies are so close it is important to have a tuned antenna. We hand tune each antenna to the center frequency you are transmitting at. We also copper plate and dip each of our antennas in a plastic dip to insure no intermittence in signal. Smiley has been manufacturing antennas for over 20 years. We have designed antennas for Search and Rescue, Border Patrol, Government, Taxi service, Fire and Police. We have been giving these Companies radio’s top performance because of low SWR ( less than 1:3), allowing anywhere from 3 to 11 db gain according to their choice of antenna. Pleases contact a Sales representative 1-800-525439 Sales@smileyantenna.com