L01_Introduction_Sp11 - EEL 4422 / EEL 6427 RF &...

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EEL 4422 / EEL 6427 RF & Microwave Circuits II Lecture #1 troduction to Introduction to RF & Microwave Circuits II 1
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Brief History of High Frequency Circuit Design Fundamentals of Electrodynamics (up to Heinrich Hertz) ilbert 600): Book e Magnete Gilbert (1600): Book De Magnete Franklin (1750): Electric charges Coulomb (1785): Forces of electric charges olta 800) Batter electric c rrent Volta (1800): Battery, electric current Oersted (1819): Current induces magnetic field Ampère (1820): Magnetic coil Ohm (1821): Current and voltage proportional 2
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William Gilbert (ca. 1600) roposed earth had its own Proposed earth had its own magnetic field, it was a giant magnet Improved the idea that there was a giant mountain in the north that attracted compass needles! His book entitled De Magnete , London, 1600, became the standard work 3
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Benjamin Franklin (1706 – 1790) Suspected that lightening was an lectrical current electrical current To prove, he used a kite to bring a metal key near the lightening He also developed many of the terms we still use today: battery, conductor, condenser, charge, discharge, uncharged, negative, minus, plus, electric shock, nd electrician and electrician. Electric charges (1750) 4
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Charles Augustin de Coulomb (1736 – 1806) Electric Point Charges: Law f attraction and repulsion of attraction and repulsion Distribution of electricity on surface of charged bodies Electrostatics 5
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Alessandro Volta (1745 – 1827) Developed electric battery that provided DC energy to the first circuits The unit of electromotive force- the driving force that moves the electric current- is now called the "volt." Battery and Electric Current 6
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Hans Christian Oersted (1777 – 1851) Discovered a fundamental connection between electricity and magnetism current induces magnetic field Boosted electrodynamics research: urrent magnetic field force motion 7 Current magnetic field force motion
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L01_Introduction_Sp11 - EEL 4422 / EEL 6427 RF &...

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