The above description is the basic idea of what is going on with the Yagi-Uda antenna. Yagi antenna design is done most often via measurements, and sometimes computer simulations. For instance, let's look at a two-element Yagi antenna (1 reflector, 1 feed element, 0 directors).
Though there are no detailed records of when the sport of track and field began, experts say that track and field history can be traced back to 776 B.C. Track and Field History Experts say that track and field history can be traced back to 776 B.C when a cook named Koroibos, from Elis, won a race that was run over 600 feet distance. It is believed that this was the only athletic event for the initial 13 Olympic Games.
Track and field events started to modernize in 1920âs. NCAA (National Collegiate Athletic Association) championships took place in 1921. Womenâs track and field was included in Olympic Games in the year 1928. In those days, the United States and the Union of Soviet Socialist Republics (USSR) - both had strong teams.