Dipole antenna other monopole) antennas on the basis of dipole antennas of which they are one half. German physicist Heinrich Hertz first demonstrated the existence of radio waves in 1887 using what we now know as a dipole antenna (with capacitative end-loading). On the other hand, Guglielmo Marconi empirically found that he could just ground the transmitter (or one side of a transmission line, if used) dispensing with one half of the antenna, thus realizing the "vertical" or monopole antenna. For the low frequencies Marconi employed to achieve long-distance communications, this form was more practical; when radio moved to higher frequencies (especially
Ivan Marconi U.S. Cremonese. Ivan Marconi Ivan Marconi (born 25 October 1989) is an Italian footballer who plays for Serie B club Cremonese. Born in Brescia, Lombardy, Marconi started his career with Internazionale. In 2006–07 season, he was awarded no.41 shirt of the first team as a member of Primavera team. In mid-2007, he was transferred to Lumezzane for free but loaned to Brescia on 31 August 2007. In the next season he was signed by Sampdoria youth team. Marconi received a call-up from the first team on 20 January 2009. In January 2009 he was sold to Gubbio from Lumezzane in