History of Wireless Communication: Maxwell to Microcells and Beyond, Slides of Electromagnetism and Electromagnetic Fields Theory

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Wireless Communication:

Past, Present, and Future

Before the “Birth of Radio”

James Clerk Maxwell

• A brilliant mathematician
• Maxwell’s Differential Equation
• Theories of relativity

Heinrich Rudolf Hertz

• A professor of physics
• Experiments dealing with electric waves
• First to broadcast and receive radio waves

The “Birth of Radio”

Guglielmo Marconi

• Educated in England and Italy
• Hertz’s death fired Marconi with idea
• Experimented in transmitting detectable Morse signal over a certain range.
• Granted a British patent in March 1897
• The Wireless Telegraph and Signal Company

Transoceanic Communication

To break the isolation of the sea

First person to bridge the Atlantic by

wireless

Used in commercial and defense

ships

Titanic incident – saved some 1,

people

Involved heavily in World War I

Continued

Edward Howard Armstrong:

Frequency Modulation (FM) in 1935

First used for public safety used.

Involved in World War II

• Motorola’s Handie-Talkie and Walkie- Talkie

Post-war rival: television

Telephone-Radio Era

Lars Magnus Ericsson

• Partnered with Carl Andersson  L.M Ericsson and Co.

1881: First Ericsson telephones were

used

1910: Car-telephone

Early 1920s: Mobile radio telephone

systems for police car dispatch.

Continued

Cellular phone

• D.H Ring and W.R. Young from Bell Laboratories (1947)
• A network of small geographical areas (called cells)
• Japanese rival: Motorola
• 1971 Intel introduced the first microprocessor

Continued

Europe: Groupe Speciale Mobile

(GSM)

• Began in 1982 by a group of 26 European national phone companies
• In many respects was better designed
• North American counterpart: PCS 1900