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Fact #1. Their birth dates back to the time of German physicist Heinrich Hertz. He was the first to prove the existence of electromagnetic waves. He did it by testing James Clerk Maxwell's electromagnetic theory of light. The theory predicted that electromagnetic waves move at the speed of light, and that light is also a type of wave. By 1887, Hertz developed an apparatus for generating and detecting radio waves.
Fact #2. He placed capacity spheres at either end of the wires for adjusting resonance. Then he discovered what happened when an induction coil applied a high voltage between the two sides. The resulting spark would generate radio frequency currents in the copper wires. These wires would then release radio waves at very high frequencies. This transmitter was a precursor to the dipole antenna.
Fact #3. The first practical dipole antenna was invented in 1953 by Marvin Middlemark. This invention revolutionized the television signal and how it was watched. It's still in use today, even. But the popularity of high-definition signals has created a niche for high-definition antennas.
Fact #4. You need to achieve the appropriate balance between directional capabilities and the environment. Multidirectional options will work well if your transmission towers aren't centrally located. Or if you want to be able to pick up signals from other cities. They're also useful if you live in a rural area with a lot of foliage that interferes with your signal quality.
Fact #5. Flat indoor models are better suited for city environs with nearby towers. Many will pick up local HD signals for a fraction of the cost of maintaining cable service or satellite dish. Some indoor antennas are also optimized for supporting surround sound. They might even feature USB power supplies for maximizing your home's energy efficiency when the television is off.