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
Egyptian Radio Egyptian Radio Egyptian Radio also known as the Egyptian Radio's General Program (إذاعة البرنامج العام transliterated as Iza'at El-Bernameg Al-Aam) also popularly known as Radio Cairo (in Arabic إذاعة القاهرة transliterated as Iza'at al Qaahira) is the pioneering Egyptian radio station that started broadcasting on 31 May 1934 in agreement with the Marconi Company. The General Manager of the station for the period was Said Basha Lotfi who presided over the station from May 1934 to December 1947. In December 1947, the contract with Marconi was suspended in favour of an Egyptian national broadcasting station. The General Manager was replaced