A UHF Phantom antenna is NOT 3-5 dB gain. At best, it's a zero gain. You'll see them advertised as a 2.5 gain dBi (Gain over an isotropic) - which is Zero dB gain. Some people decide that 2.5 dBi rounds up to 3 dBi for advertising purposes, and since most people don't know or care to figure out what the difference is - it means that dBi ratings sell more antennas. If you want a true Gain antenna in UHF, you're going to need something taller than 1/4 wavelength. That said, the Phantom antennas are decent enough for what they are, but don't expect any miracles.