Hey, A chance to use SI-DRAW to send a figure. -----Original Message----- From: si-list-bounce@xxxxxxxxxxxxx [mailto:si-list-bounce@xxxxxxxxxxxxx]On Behalf Of atifshamim khan Sent: Friday, July 09, 2004 10:27 AM To: Si Subject: [SI-LIST] balun theory Hi all Following figure is a basic balun structure. I have utilized this to feed/test an on-chip dipole on bulk Si, but I still dont know how it works in theory. There is an unbalanced signal (Zin) at the input and a balanced signal at the output(load resistor ZL). Basically one end of the transmission line is grounded. At the output (the two ZL terminals) have signal which is equal in magnitude but opposite in phase.This means that between the two transmission lines a phase reversal has taken place. How is this achieved or in other words how can we explain the working of this balun in terms of voltages and currents or electric and magnetic fields? My guess is that we are forcing and odd mode in the transmission lines? Is that right? what is the difference between odd mode and even mode impedances here. Any input in terms of explanation or references will be appreciated. Thanks Atif --------------------------------- Do you Yahoo!? Read only the mail you want - Yahoo! Mail SpamGuard. ------------------------------------------------------------------ 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 --- Incoming mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.716 / Virus Database: 472 - Release Date: 7/5/2004 --- Outgoing mail is certified Virus Free. Checked by AVG anti-virus system (http://www.grisoft.com). Version: 6.0.716 / Virus Database: 472 - Release Date: 7/5/2004 ------------------------------------------------------------------ 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