Planar transmission lines are flat, ribbon-shaped transmission lines with conductors, or in some cases dielectric (insulating) strips. They are used to interconnect components on printed circuits and integrated circuits working at microwave frequencies, since the planar lines are suited to the manufacturing methods for these components. Transmission line theory is used when the line is longer than a large fraction of a wavelength. At microwave frequencies, this distance is measured in millimetres, which is small enough that these lines can be used for constructing components as well as interconnecting them. The cross- section of the line is usually kept constant so that its electrical behaviour is highly predictable. The first planar transmission line, stripline, was conceived during World War II by Robert M. Barrett; other types in modern use include microstrip, suspended stripline, and coplanar waveguide.

Read more: https://en.wikipedia.org/wiki/Planar_transmission_line

_______________________________ Today's selected anniversaries:

1783:

A potential uprising in Newburgh, New York, was defused when George Washington asked Continental Army officers to support the supremacy of Congress. https://en.wikipedia.org/wiki/Newburgh_Conspiracy

1927:

In rowing, Oxford defeated Cambridge in the first Women's Boat Race (2015 edition pictured) held in Oxford, England. https://en.wikipedia.org/wiki/Women%27s_Boat_Race

1951:

The Iranian oil industry was nationalized in a movement led by Mohammad Mosaddegh. https://en.wikipedia.org/wiki/Nationalization_of_the_Iranian_oil_industry

2011:

Arab Spring: Protests erupted across Syria against the authoritarian government, marking the start of the Syrian Civil War. https://en.wikipedia.org/wiki/Syrian_Civil_War

_____________________________ Wiktionary's word of the day:

slugabed: (archaic, now chiefly Canada, US) A lazy person who lies in bed after the usual time for getting up; a sluggard. https://en.wiktionary.org/wiki/slugabed

___________________________ Wikiquote quote of the day:

Fight for the things that you care about, but do it in a way that will lead others to join you.   --Ruth Bader Ginsburg https://en.wikiquote.org/wiki/Ruth_Bader_Ginsburg