[SI-LIST] Re: balun theory
- From: "Fasig, Jonathan L." <fasig.jonathan@xxxxxxxx>
- To: atifshamimkhan@xxxxxxxxx, si-list@xxxxxxxxxxxxx
- Date: Mon, 12 Jul 2004 08:05:25 -0500
A text which discusses balun devices in some detail is "Transmission Line
Transformers" by Jerry Sevick, ISBN 1-884932-66-5.
jf
------------------------------------------------------------------------
Jonathan Fasig Email: fasig.jonathan@xxxxxxxx
Mayo Foundation
4001 41st Street NW
MSC Sn 2-132 Phone: (507) 538-5464
Rochester, MN 55901 Fax: (507) 284-9171
-----Original Message-----
From: atifshamim khan [mailto:atifshamimkhan@xxxxxxxxx]
Sent: Friday, July 09, 2004 12:27 PM
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
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