In November 1781, John Hanson became the first President of the United States in Congress Assembled, under the Articles of Confederation. Many people have argued that John Hanson, and not George Washington, was the first President of the United States, but this is not quite true.
Even and odd mode impedances of a coupled microstrip line. actually I find the reason when you use differential port, the impedance you get is twice the odd mode impedance, whereas if you use common port, the impedance is half the even mode impedance. 1 members found this post helpful.
1 The product of an even function and an odd function is an odd function. 2  The quotient of two even functions is an even function. 3  The quotient of two odd functions is an even function.  The quotient of an even function and an odd function is an odd function.