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.
Incorporating events such as 3 foot races: dolichos, diaulos, and stadion as well as the pentathlon events as well: long jump, discus, wrestling, boxing, hoplitodromos, and pankration. The sport of track and field began in the United States during 1860âs. The first athletic group of the country (The Intercollegiate Association of Amateur Athletes in America) had the first competition in 1873. Following this in 1876 the United States held their first annual national championships.