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.
Racewalking first appeared in the modern Olympics in 1904 as a half-mile walk in the 'all-rounder,' the precursor to the 10-event decathlon. In 1908, stand-alone 1,500m and 3,000m racewalks were added, andâexcluding 1924âthere has been at least one racewalk (for men) in every Olympics since.