Indoor HDTV Antenna Vs Outdoor HDTV Antenna
Indoor HDTV antennas are usually more popular as they are very easy to install and also cost far less when compared to outdoor antennas. However, the indoor antennas have to be placed very close to the television set which is usually at the same level as the television itself. This lack of elevation along with possible distortions produced from walls, furniture and other items present in the house usually inhibits the performance of the antennas. Hence, the indoor antennas are ideal only when they are in close proximity to local transmitters along with minimal topographical and structural obstructions.

Outdoor HDTV antennas are usually considered to be the best antennas even though they incur high installation and basic costs. Further, the harsh environment also takes its toll on the antenna. They are ideal for reception in remote areas where the transmission towers are very far.
Directional HDTV Antenna Vs Omni-Directional HDTV Antenna
An omni-directional antenna is used when the conditions to receive the signals are good and also the signal is strong. It also provides the advantage that one does not have to worry as to which direction the signal is coming from. A directional antenna on the other hand is a requirement where the signals are weak. Here, if two signals coming from two different directions have to be picked then either two different antennas or an antenna rotator is required.
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