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--- In Electronics_101@..., "Roy J. Tellason"
<rtellason@b...> wrote:
Alien Steve said:

Microstripline so impedances match in circuit.

Heard of that stuff, never saw any (that I know of) or worked with

it. What

can you tell me about it?

Google is your friend. So is the Links section, I had previously
posted a lot of links on Microstripline, mostly impedance calculators.

Basically a trace on a board with a groundplane on back acts as a
transmission line. The impedance varies inversely with the width of
the trace.

A stripline transmission line is when it is in the center, enclosed by
ground planes on top and bottom. A microstripline is when it is just a
double-sided board with ground on one side, copper strip on other open
to the air on top.

You can do all the same things with it that you can with coax.
Matching impedances, mixers, resonant stubs, couplers, etc.

Alien Steve