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>
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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>
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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>
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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>