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Bob Ross | 3 Oct 2011 17:58

Asian IBIS Summit (Taipei) - Third Announcement

To All:

The IBIS Open Forum is holding its second Asian IBIS Summit Meeting in

Taipei, Taiwan a major technology center, on Monday, November 21, 2011.

Several companies listed below are co-sponsoring this major event at

the Sherwood Hotel, Taipei.

We encourage technical contributions from Asia.

For travel planning, we are also scheduling these Asian IBIS Summit

meetings:

  Shanghai, P.R. China, Tuesday November 15, Parkyard Hotel

  Yokohama, Japan, Friday, November 18, Pacifico Yokohama

Bob Ross

Teraspeed Consulting Group

Polin Chi

Sigrity

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Lee Ritchey | 3 Oct 2011 18:37
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Lee Ritchey's Signal Integrity and High Speed System Design Class in Burlingame

There are still a few seats available for the excellent class in high speed 
design.  It is the only public offering of this class in 2011.

******************HIGH SPEED PCB AND SYSTEM DESIGN COURSE SAN FRANCISCO 
AIRPORT (BURLINGAME) CALIFORNIA

Event: Two-day High Speed PCB and System Design Course

Date: October 19-20, 2011-REGISTRATION DEADLINE: OCTOBER 10, 2011!

Location:           Hilton Garden Inn
765 Airport Boulevard
Burlingame, CA 94010

Course Description:

This two-day training session on the design of high-speed PCBs and their 
associated systems is the premier course offered by Speeding Edge and has 
been taught to more than 8,000 engineering professionals worldwide. 
Conducted by one of the world's leading experts on high-speed PCB and 
computer system design and Speeding Edge President, Lee Ritchey, this very 
practical course is thorough and comprehensive. It covers all the physics 
involved in high-speed design, explaining the science behind each one of the 
principles, their role in high-speed systems and how to properly manage the 
design process to account for them. This course will give the engineering 
professional the fundamental knowledge necessary to make the most efficient 
design rule set; organize the design process to efficiently execute the 
design, select the appropriate PCB materials and choose the toolsets that 
will best suit the design process. This course is especially relevant to IC 
designers as device speeds outstrip the traditional packages and application
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S A | 4 Oct 2011 11:38
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how EM wave propagates through space


Hi Experts,

My question is related to propagation of EM waves.
As EM waves have electric field and magnetic field and as we know that electric field is due to the motion of
electrons and require some conducting medium.But I am confused that how EM wave propagate through space.
what happens to the electric and magnetic field?
I am sorry my question is very basic. but what happens to the electric and hence magnetic field in space and
how these fields exists in space.

Thanks,
Shahbaz Assad

 		 	   		  
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steve weir | 4 Oct 2011 11:52

Re: how EM wave propagates through space

http://en.wikipedia.org/wiki/James_Clerk_Maxwell

On 10/4/2011 2:38 AM, S A wrote:
>
>
>
> Hi Experts,
>
> My question is related to propagation of EM waves.
> As EM waves have electric field and magnetic field and as we know that electric field is due to the motion of
electrons and require some conducting medium.But I am confused that how EM wave propagate through space.
what happens to the electric and magnetic field?
> I am sorry my question is very basic. but what happens to the electric and hence magnetic field in space and
how these fields exists in space.
>
>
>
>
>
> Thanks,
> Shahbaz Assad
>
>
>
>
>
>
>
>
>
(Continue reading)

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Paglia Frank-B37323 | 4 Oct 2011 16:08
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Re: how EM wave propagates through space

Shahbaz,

Charge is the source of an electrostatic field. Dynamic electric fields are created by time varying
magnetic fields.
The relationship is given by Faraday's law which relates the curl of the electric field to a time varying
magnetic field. The Ampere-Maxwell law relates the curl of the magnetic field to a time varying electric
field and the current density. These equations are coupled and by taking the curl of each one and using
substitution you get the wave equations for electric and magnetic fields. 
I suggest looking at A Student's Guide to Maxwell's Equations by Dan Fleisch http://www4.wittenberg.edu/maxwell/
He does a excellent job of explaining Maxwell and the related math.

Frank

Frank Paglia
Freescale Semiconductor, Austin, Texas
Packaging Solutions Development
Email:      frank.paglia@...

-----Original Message-----
From: si-list-bounce@...
[mailto:si-list-bounce@...] On Behalf Of S A
Sent: Tuesday, October 04, 2011 4:39 AM
To: si-list@...
Subject: [SI-LIST] how EM wave propagates through space

Hi Experts,

My question is related to propagation of EM waves.
As EM waves have electric field and magnetic field and as we know that electric field is due to the motion of
electrons and require some conducting medium.But I am confused that how EM wave propagate through space.
(Continue reading)

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Ihsan Erdin | 4 Oct 2011 16:22
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Re: how EM wave propagates through space

Shahbaz,
A few corrections to your assumptions follow. First, the electric field is
due to the charge (electron) itself not its motion. The charge motion is
attributed to the magnetic field but indeed magnetic field originates from
the spin properties of matter which is a more complex quantum effect. You
can find a good presentation of this subject in the following portal

http://en.wikipedia.org/wiki/Portal:Electromagnetism

The second issue is that you don't need conductors for field propagation. EM
fields will propagate in vacuum, as well. Maxwell-Ampere law relates the
time varying electric field to the curl (rotation) of the magnetic field
through displacement current. In other words, a time varying electric field
generates magnetic field. Maxwell-Faraday law, on the other hand states a
time varying magnetic field is the source of electric field. The interleaved
generation of the electric and magnetic fields from one another is the cause
of energy propagation in the permeating field at the speed of light.

Regards

On Tue, Oct 4, 2011 at 5:38 AM, S A <shahbaz_assad@...> wrote:

>
>
>
>
> Hi Experts,
>
> My question is related to propagation of EM waves.
> As EM waves have electric field and magnetic field and as we know that
(Continue reading)

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vinod ah | 4 Oct 2011 16:38
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Re: how EM wave propagates through space

Hi All,
Can anyone please explain the EM wave movement in free space rather than
going into equations. It is very easy to quote Maxwell's equations & complex
mathematical derivations to explain but physically how does the
wave propagate as we know that for electric field to exist there should be a
charge and free space has no charge!!!.For magnetic field to exist the
charge should be in motion and if charge is only not there where is the
point of motion!!! If i am wrong do correct me.

Regards
Vinod A H
EchoStar Corporation

On Tue, Oct 4, 2011 at 7:52 PM, Ihsan Erdin <erdinih@...> wrote:

> Shahbaz,
> A few corrections to your assumptions follow. First, the electric field is
> due to the charge (electron) itself not its motion. The charge motion is
> attributed to the magnetic field but indeed magnetic field originates from
> the spin properties of matter which is a more complex quantum effect. You
> can find a good presentation of this subject in the following portal
>
> http://en.wikipedia.org/wiki/Portal:Electromagnetism
>
> The second issue is that you don't need conductors for field propagation.
> EM
> fields will propagate in vacuum, as well. Maxwell-Ampere law relates the
> time varying electric field to the curl (rotation) of the magnetic field
> through displacement current. In other words, a time varying electric field
> generates magnetic field. Maxwell-Faraday law, on the other hand states a
(Continue reading)

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Paglia Frank-B37323 | 4 Oct 2011 17:04
Favicon

Re: how EM wave propagates through space

Vinod,

If you take a little bit of time to understand the equations then it makes perfect sense. While it is true that
an electric charge creates an electric field, it is not the only why electric fields are created. 

Basically what happens is this. A changing magnetic field creates a changing electric field and a changing
electric field creates a changing magnetic field. These fields can propagate in free space, which as you
said has no charge.

I suggest looking at A Student's Guide to Maxwell's Equations by Dan Fleisch. He does a very good job
explaining Maxwell, math and all, and helps you understand in words what the equations are saying. Unlike
some of the undergrad texts it's a short book and he even has podcasts of him reading the text on his website. 

Just like anything that is worthwhile, EM takes some effort.

Best Regards,

Frank Paglia
Freescale Semiconductor, Austin, Texas
Packaging Solutions Development
Email:      frank.paglia@...

-----Original Message-----
From: si-list-bounce@...
[mailto:si-list-bounce@...] On Behalf Of vinod ah
Sent: Tuesday, October 04, 2011 9:38 AM
To: si-list@...
Subject: [SI-LIST] Re: how EM wave propagates through space

Hi All,
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Ihsan Erdin | 4 Oct 2011 17:10
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Re: how EM wave propagates through space

Vinod,
Even if you want to avoid the equations, you should at least acknowledge the
field concept and imagine a space permeated by the field lines. The wave
propagation is simply the propagation of the disturbance (energy) which is
generated by a moving charge in this field. The source of the disturbance
(charge) doesn't have to be there for the energy to propagate just like a
fault on the ocean floor could be thousands of miles away from the shores
where tsunami hits.

On Tue, Oct 4, 2011 at 10:38 AM, vinod ah <ah.vinod@...> wrote:

> Hi All,
> Can anyone please explain the EM wave movement in free space rather than
> going into equations. It is very easy to quote Maxwell's equations &
> complex
> mathematical derivations to explain but physically how does the
> wave propagate as we know that for electric field to exist there should be
> a
> charge and free space has no charge!!!.For magnetic field to exist the
> charge should be in motion and if charge is only not there where is the
> point of motion!!! If i am wrong do correct me.
>
> Regards
> Vinod A H
> EchoStar Corporation
>
> On Tue, Oct 4, 2011 at 7:52 PM, Ihsan Erdin <erdinih@...> wrote:
>
> > Shahbaz,
> > A few corrections to your assumptions follow. First, the electric field
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S A | 4 Oct 2011 18:07
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Favicon

Re: how EM wave propagates through space


Hi All,
I agree with Vinodh. Mine and his question is the same

Thanks,
Shahbaz Assad

> From: ah.vinod@...
> Date: Tue, 4 Oct 2011 20:08:10 +0530
> Subject: [SI-LIST] Re: how EM wave propagates through space
> To: si-list@...
> 
> Hi All,
> Can anyone please explain the EM wave movement in free space rather than
> going into equations. It is very easy to quote Maxwell's equations & complex
> mathematical derivations to explain but physically how does the
> wave propagate as we know that for electric field to exist there should be a
> charge and free space has no charge!!!.For magnetic field to exist the
> charge should be in motion and if charge is only not there where is the
> point of motion!!! If i am wrong do correct me.
> 
> Regards
> Vinod A H
> EchoStar Corporation
> 
> On Tue, Oct 4, 2011 at 7:52 PM, Ihsan Erdin <erdinih@...> wrote:
> 
> > Shahbaz,
> > A few corrections to your assumptions follow. First, the electric field is
> > due to the charge (electron) itself not its motion. The charge motion is
(Continue reading)

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Gmane