What Is An Antenna Array?
An antenna array is a system of antennas joined together to increase sensitivity or obtain directional effects. The Yagi antenna was developed by Japanese scientists in the 1930s. A Yagi antenna is the typical kind of terrestrial TV antenna found commonly on the rooftops of houses. It is used at frequencies ranging between 30MHz and 3GHz or at a wave length that ranges from 10 centimetres to 10 meters. A typical Yagi is made of two or three straight elements, each of them measuring an estimated ½ wavelengths. There are three kinds of elements or rods that are mounted on a vertical connecting rod or bar. The three elements are known as the driving element, the reflector(s) and the director(s). The director elements are shorter than the driver element. The reflector is longer than the driving element and is spaced closer than the director(s). A typical Yagi is known to have one reflector and about two or more directors. With addition of more directors, the Yagi has a greater amount of “f
