[SI-LIST] Re: Need a equation of inductance calculation for microstrip over the ground plane
- From: "Lambert Simonovich" <bertsimonovich@xxxxxxxxxx>
- To: <alfred1520list@xxxxxxxxx>
- Date: Wed, 17 Sep 2014 11:24:19 -0400
Alfred,
In his example, the time delay is 100 ps for the total length of the 50 ohm
t-line.
-----Original Message-----
From: si-list-bounce@xxxxxxxxxxxxx [mailto:si-list-bounce@xxxxxxxxxxxxx] On
Behalf Of alfred1520list
Sent: September-17-14 10:57 AM
To: telegrapher9@xxxxxxxxx; Dave Cuthbert; cchwang2013@xxxxxxxxx
Cc: wangwensong1986@xxxxxxxxx; si-list@xxxxxxxxxxxxx
Subject: [SI-LIST] Re: Need a equation of inductance calculation for
microstrip over the ground plane
Hi Dave,
Nice to know. Thanks.
Does length play a part? Is it per unit length? What unit? Thanks.
Best regards
Alfred
On September 17, 2014 5:57:16 AM PDT, Dave Cuthbert <telegrapher9@xxxxxxxxx>
wrote:
>Song, here are my two favorite SI formulas (that's pretty geeky I
>know):
>C = t/Z
>
>L = t x Z
>
>The capacitance of a t-line (microstrip in your case) is the
>propagation delay divided by the line characteristic impedance.
>
>The inductance of a t-line is the propagation delay multiplied by the
>line characteristic impedance.
>
>Let's say you have a 50 ohm line and the propagation delay is 100 ps.
>The
>capacitance is 2 pF and the inductance is 5 nH.
>
> Dave Cuthbert, Narte Certified EMC Engineer Consultant for EMC, SI,
>RF, Power Electronics, and most everything analog
>
>On Tue, Sep 16, 2014 at 9:22 PM, C.C. Hwang <cchwang2013@xxxxxxxxx>
>wrote:
>
>> You can use a 2D solver (such as http://ataitec.com/free_2d_solver)
>to
>> compute all RLGC.
>> Carl
>>
>> On Sun, Sep 14, 2014 at 4:42 PM, ���������
><wangwensong1986@xxxxxxxxx> wrote:
>>
>> > Hello everyone,
>> > Now I want to calculate a approximate value for inductance of
>microstrip
>> > line over a ground plane.
>> >
>> > Anyone have any references you can send my way? I know I've been
>able to
>> > find this stuff in the past, but right now I'm coming up empty...
>> >
>> > Thank you.
>> >
>> > All the best,
>> >
>> > Song
>> >
>> >
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