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.
Most track and field events are individual sports with a single victor, but a number are relay races. Events are almost exclusively divided by gender, although both the men's and women's competitions are usually held at the same venue.he 1500 m and mile run events have historically been some of the most prestigious track and field events. Swedish rivals Gunder Haegg hÃ¤gg And Arne andersson broke each'other s 1500 m and mile world records on a number of occasions in the. 1940s