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Kirt Blattenberger - RF Cafe Webmaster

Copyright: 1996 - 2024
Webmaster:
    Kirt Blattenberger,

    BSEE - KB3UON

RF Cafe began life in 1996 as "RF Tools" in an AOL screen name web space totaling 2 MB. Its primary purpose was to provide me with ready access to commonly needed formulas and reference material while performing my work as an RF system and circuit design engineer. The World Wide Web (Internet) was largely an unknown entity at the time and bandwidth was a scarce commodity. Dial-up modems blazed along at 14.4 kbps while tying up your telephone line, and a nice lady's voice announced "You've Got Mail" when a new message arrived...

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Field Solver for Linux, & Plating Question - RF Cafe Forums

RF Cafe Forums closed its virtual doors in 2012 mainly due to other social media platforms dominating public commenting venues. RF Cafe Forums began sometime around August of 2003 and was quite well-attended for many years. By 2010, Facebook and Twitter were overwhelmingly dominating online personal interaction, and RF Cafe Forums activity dropped off precipitously. If the folks at phpBB would release a version with integrated sign-in from the major social media platforms, I would resurrect the RF Cafe Forums, but until then it is probably not worth the effort. Regardless, there are still lots of great posts in the archive that ware worth looking at.

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Quantum
Post subject: Field Solver for Linux, & Plating Question
Unread postPosted: Sat Aug 14, 2004 7:29 pm

Hello, what a great resource... wish I'd found y'all before.

Designing a microwave circuit in the 2.4GHz range. Looking for an -accessible- field solver to lay out PCB, meaning one that doesn't require a PhD in math to use. I know exactly what components I'll be using, and will design using co-planar waveguide design, but hope for a precise and easy modelling and interactive analysis of the layout.

Looked at Ansoft's two major products, and neither makes sense to me in practice. Word here seems to be that ADS is also non-intuitive. We run Linux, and the field-solver would ideally run on OSS platform, but that's not mandatory. It does though need to be accessible to a reasonably-intelligent but math-challenged person. For example, if I want to make a 1/4wave lightning bypass which blocks at freq of interest; to model length, vs copper core and plating of silver or gold? Or distances between absorptive switch, bandpass, and poweramp?


Also as to plating; my brother (20 yr TI engineer) tells me that gold electroplating is not advisable at microwave, as microscopically it has a surface of 'tiny hairs'. That chemical gold-plating is better due to large granule size. NE1 heard of this?

If neither is advisable, how should traces be protected from corrosion and allow good skin-effect? Silver has good properties, but oxydizes horribly.

Thanks in advance.


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Guest
Post subject:
Unread postPosted: Mon Sep 27, 2004 12:31 pm

Hi!

Try Sonnet Lite (downloadable for *free* from www.sonnetsoftware.com ).

It's limited in capacity for the free version, but still gives you a good usable program with excellent accuracy.

Good Luck




Posted  11/12/2012
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