Brian,
you seem to have no limitations, been sniffing uwaves too! Your bibliography will be of most interest! Right, skin effect plays a role (sorry, have no circumflex on new key board), and with a thick solder as main EM wave carrier, the losses would have a detrimental impact. But the rest of the line is gold over copper. What we may get is instead a discontinuity, which distorts the signal a little, but that can be tuned off. So, my q is mainly about mechanical properties.
Your book is welcome, may be a hit here? Can you list the content?
????????
Ingemar
-----Original Message-----
From: Brian Ellis [mailto:[log in to unmask]]
Sent: den 17 december 2004 16:43
To: TechNet E-Mail Forum; Ingemar Hernefjord (KC/EMW)
Subject: Re: [TN] Wanted: TN's best-on-coax-soldering
Ingemar
I'm no expert on µwaves, although I have done a wee bit. However, I've
just finished a book review which may, or may not be relevant. I'm
attaching a copy, which should get to you, but not the net list.
My initial reaction to your idea is the effect on the characteristic
impedance and increased losses due to skin effect, if I understand you
correctly.
Brian
Ingemar Hernefjord (KC/EMW) wrote:
> Making microwave 'boxes' got its challenge. Oftenly. Now, SMA coax through aluminium wall, center pin soldered on teflon board. Mismatch. Naturally. But design guys do not always listen. So, after tempchanges, the expected failure happens of course. Not necessary to tell what. There are many solutions when you make new design, but I have to give clever advice for what's already frozen and in production. Other solder? Z-link? Silver epoxy? etc...Omitted all but one: much longer terminal strip. If you solder a strip which in n times longer, you'll 1)get a much stronger joint, 2)no dentrimental impact on the signal(>40 GHz), 3) coax plugin/plugout longitudinal forces will not have same negative impact. When I say solder, I mean soldering all along the strip, literally bury the longer strip in solder.
> What does the expertise think? Am I right?
> Will ask humble Oklahoma fast triggering Lucky Steve if he's willing to add pic to world famous cabinet..
>
> Ingemar Hernefjord
> Ericsson Microwave Systems
>
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