FREQUENCY BANDS
TV broadcast are in the VHF and UHF frequency bands. Virtually all home antennas are designed to receive UHF signals. Many antennas get both UHF and VHF signals. In some cases a UHF antenna will receive a VHF signal at reduced power, but still strong enough for reception.
ANTENNA RANGE
Your location (from towers) and antenna are the main factors that determine the broadcast tower range you can get a signal. The larger the antenna the more signal captured (gain). The higher the antenna is mounted the greater the signal density.
ANTENNA DIRECTION
Your antenna should be pointed in the general direction of the broadcast towers, and have a relatively clear path to the towers. TV signals are Line-of-Sight, large obstructions (hills, buildings, trees) can reduce or block reception.