10Terrestrial Broadband Wireless Telecommunications

Historical Note

Whereas wireline communications followed the invention of electricity by Alessandro Volta, wireless communications are based on the discoveries of a number of scientists including Hans Christian Ørsted, Michael Faraday, James Maxwell, and Heinrich Hertz (pictured)1 on the propagation of electromagnetic waves in the air. In particular Hertz’ experiments, first reported in 1888, with equipment to generate, transmit and receive electromagnetic waves were essential to the invention of radio telegraphy in the late 19th century. He developed a device to produce an electromagnetic wave, means to transmit and receive the wave, and a means to detect the received wave, as shown in Figure 10.1. This equipment essentially facilitated the same processes of present day wireless telecommunications as used for example in mobile phones.

Besides Hertz’ experiments a number ...

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