[SI-LIST] Re: Open Termination
- From: "Ahmed El-Sanhoury" <rd-ahsanh@xxxxxxxxxxxxxx>
- To: <si-list@xxxxxxxxxxxxx>, <si_monkey2@xxxxxxxxx>
- Date: Wed, 15 Sep 2004 11:35:06 +0300
si_monkey2
I'm afraid that there is misunderstanding point, so i will try to =
declare it:
1- When saying "open termination offers infinite impedance" means Load =
Impedance ZL=3D infinite impedance.=20
2- According to that the input impedance of transmission line Zin equals =
directly the characteristic impedance Zo.
3- If the transmission line media is air, the Zo =3D 120pi =3D 120x3.14 =
=3D 377ohm.
4- so in this case Zin equals also 377 ohm.
According the above i can modify your statement "Open end line is =
exposed to air has about 377 ohms"
to " Open end line which go through the air has about 377 ohm".
Thanks
Senior Eng A.Sanhoury
IEP R&D Bahgat Group
www.bahgat.com
> ----------
> From: si-list-bounce@xxxxxxxxxxxxx[SMTP:si-list-bounce@xxxxxxxxxxxxx]
> =
on behalf of Sitar Moniker[SMTP:si_monkey2@xxxxxxxxx]
> Reply To: si_monkey2@xxxxxxxxx
> Sent: Wednesday, September 15, 2004 12:48 AM
> To: si-list@xxxxxxxxxxxxx
> Subject: [SI-LIST] Open Termination
>=20
> In SI and HSDD books, they assume that open termination offers =
infinite impedance. My understanding is open end line is exposed to air =
which has about 377 ohms.=20
> =20
> 1) How do you get infinite impedance for unterminated line?=20
> =20
> 2) Is there any intuitive way to show that voltage at the open end =
doubles- other than using math: ref. coeft. =3D +1?
> =20
> __________________________________________________
> Do You Yahoo!?
> Tired of spam? Yahoo! Mail has the best spam protection around=20
> http://mail.yahoo.com=20
>=20
> ------------------------------------------------------------------
> To unsubscribe from si-list:
> si-list-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field
>=20
> or to administer your membership from a web page, go to:
> //www.freelists.org/webpage/si-list
>=20
> For help:
> si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field
>=20
> List FAQ wiki page is located at:
> http://si-list.org/wiki/wiki.pl?Si-List_FAQ
>=20
> List technical documents are available at:
> http://www.si-list.org
>=20
> List archives are viewable at: =20
> //www.freelists.org/archives/si-list
> or at our remote archives:
> http://groups.yahoo.com/group/si-list/messages
> Old (prior to June 6, 2001) list archives are viewable at:
> http://www.qsl.net/wb6tpu
> =20
>=20
>=20
------------------------------------------------------------------
To unsubscribe from si-list:
si-list-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field
or to administer your membership from a web page, go to:
//www.freelists.org/webpage/si-list
For help:
si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field
List FAQ wiki page is located at:
http://si-list.org/wiki/wiki.pl?Si-List_FAQ
List technical documents are available at:
http://www.si-list.org
List archives are viewable at:
//www.freelists.org/archives/si-list
or at our remote archives:
http://groups.yahoo.com/group/si-list/messages
Old (prior to June 6, 2001) list archives are viewable at:
http://www.qsl.net/wb6tpu
Other related posts:
