Wireless Telegraphy and Radio Wireless Information Network and National Broadcast System CEE 102: Prof. Michael G. Littman Course Administrator: Hiba Abdel-Jaber
[email protected] Computers allowed for NOTETAKING ONLY Please - NO Cell Phones, Texting, Internet use 1 Consumer Goods 1900 - 1980 Economics and Politics 2 Consumer Goods 1900 - 1980 RMS Titanic with Marconi Antenna Economics and Politics 3 Marconi - Wireless messages at sea RMS Titanic with Marconi Antenna 4 transmitter receiver Marconi - Wireless messages at sea Heinrich Hertz’s Experiment - 1888 § Spark in transmitter initiates radio burst § Spark in receiver ring detects radio burst 5 transmitter receiver DEMO Marconi - Wireless messages at sea Heinrich Hertz’s Experiment - 1888 § Spark in transmitter initiates radio burst § Spark in receiver ring detects radio burst 6 transmitter receiver Heinrich Hertz’s Experiment - 1888 § Spark in transmitter initiates radio burst § Spark in receiver ring detects radio burst 7 Electromagnetic Wave wave-speed frequency wavelength Time or Length 8 Electromagnetic Wave wave-speed frequency Wireless Telegraph Hertz Discovery wavelength Marconi Patents Marconi Demonstrations Time or Length 9 Marconi’s Wireless Telegraph Wireless Telegraph Hertz Discovery Marconi Patents Marconi Demonstrations 10 Marconi’s Wireless Telegraph Wireless Telegraph Hertz Discovery DEMO Marconi Patents Marconi Demonstrations 11 Marconi’s Wireless Telegraph 12 13 Marconi’s Patent for Tuning coherer 14 Tuning Circuit Marconi’s Patent for Tuning L C coherer 1 1 ν = 2π LC 15 Transmitting antenna Marconi’s Patent for Tuning coherer Cornwall (England) 16 KITE Receiving antenna Transmitting antenna Saint John’s (Newfoundland) Cornwall (England) …..dot……….……dot……......…….dot…... December 12, 1901 17 KITE Receiving antenna Saint John’s (Newfoundland) Marconi gets Nobel Prize in 1909 …..dot……….……dot……......…….dot…..