Update 1.1 seed-bug workaround

Couplings Designer 1.1 was released yesterday along with new features like prescribed zeros, predistortion, bandstop support, iPad support etc. However, we didn’t anticipate a bug that was introduced when updating from 1.0 which makes seeding new coupling matrices impossible. The problem is due to a compile-time error (un-initialized variable) which was only observed in the binary uploaded to the App Store and was therefore not tested. This bug has been resolved and is due for approval by Apple’s App Store review team. You may expect an update in a week’s time from today. Hold on tight couplings-crew! 😉

A quick solution is to use a finite quality factor (and a finite effective quality factor). A “lossless” matrix can be seeded by maxing both quality factors, for instance a quality of 100000…

Update 1.2 is expected to arrive around 18th of june!

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Releasing Couplings Designer for iPhone

Design and synthesize modern advanced RF and microwave filters with Couplings Designer for iPhone, available today for $29.99 at the app store. Try Couplings Designer LITE for free, which has all the features but limited to 4th order filters.
 

Try Couplings Designer LITE for free on your iPhone!

 
Couplings Designer is a powerful and modern coupling matrix synthesis software for professional filter designs. It features an easy to use interface, tuning, a built-in coupling matrix optimizer, Monte Carlo tolerance analysis and an arbitrary topology transformer. It’s an ideal tool for professional filter engineers, system engineers and students alike. Read more about it here..

Learn about features available in Couplings Designer and take a tutorial on how this tool can assist you in your filter designs.

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