How to decrease the length of transmission line

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rfdipper

Joined: 19 Mar 2003
Posts: 15
Location: phil

19 May 2003 11:34 How to decrease the length of transmission line

hi again!

I read an article describing how to shorten a transmission line, which is very good if you are saving board space, but the the limiting factor is the high impedance of the shortened line and the capacitors used for resonance. Sad

Is there other ways?
Thanks again. Smile

mr_ghz

Joined: 01 Apr 2002
Posts: 294
Helped: 2

19 May 2003 12:19

Hi rfdipper,

To save boardspace you can use a dielectric with a higher er value. On
such materials the wave propagates slower, so the structures get smaller.

Bye

junction_crosstalk

Joined: 03 Dec 2002
Posts: 24

19 May 2003 18:31

Hi,

The first comment is correct. What you can do is to stack another substrate on it so it will be like a sandwich structure. This will eventually increase the Eeff which decrease the electrica length which means decreasing the physical length.

JC

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sigint

Joined: 01 Jan 1970
Posts: 1119
Helped: 14
Location: State of total unemployment

20 May 2003 4:16

You can widen the trace to lower the impedance and increase the capacitance this also has the effect of increasing the bandwidth, see Howard Johnson's articles - available I believe at www.ednmag.com.

SiGiNT