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
Alenia Marconi Systems 2001 AMS' missile systems division was merged with Aerospatiale Matra Missiles and Matra BAe Dynamics to form MBDA. On 7 October 2003 the UK holding company for AMS changed its registered name from Alenia Marconi Systems Limited to AMS Limited to comply with the agreements reached regarding use of the name "Marconi" following the sale of Marconi Electronic Systems by GEC (later Marconi plc). This name change was reflected in rebranding across the company, although the Italian holding company retained the name Alenia Marconi Systems SpA. On 28 January 2005 BAE Systems and Finmeccanica announced the intention to dissolve their