Author Archives: Göran Granström

About Göran Granström

Feel free to comment any of my products and projects if you like them, have a question or want to request a feature. Looking for a consulting engineer? Visit my linked[in] profile and contact me for availability. You will find contact information on the bottom of this page.

Couplings Designer Update 1.4

Releasing Couplings Designer 1.4 for iPhone and iPad! Get it at the App Store, new users may also want to try Couplings Designer Lite for free. Features – Tutorials – Documentation Features and bug fixes in this version:

Posted in News - 2 Comments

iOS 7.1 related bug discovered!

As some of you have generously pointed out there is a bug in Couplings Designer 1.3 that was introduced with the iOS 7.1 release a couple of weeks ago. The bug introduces a crash whenever one is performing any of … Continue reading

Posted in News - 1 Comment

Tutorial, coaxial cavity filter

Read the article: Coaxial cavity filter with folded topology. An aluminum coaxial re-entrant resonator is designed for high Q to meet specifications on insertion loss. High rejection is achieved with a symmetrical pair of transmission zeros implemented using an electric … Continue reading

Posted in News - Leave a comment

Tutorial, combline cavity filter

Read the article: Combline cavity filter. In this tutorial we will learn how to synthesize and implement a chebyshev response with a combline cavity topology using Couplings Designer. Couplings are extracted and linked to physical dimensions and then combined to … Continue reading

Posted in Microwave Theory - Leave a comment

New filter synthesis tool for windows

Currently looking for beta testers of a new filter synthesis tool, similar to Couplings Designer, for windows. I will select a number of testers that will be rewarded with the end product when released. You need to be familiar with … Continue reading

Posted in News - 11 Comments

Tutorial, lumped filters

Read the article: Lumped filter design using coupling matrix techniques. Learn how to turn your synthesized coupling matrix into lumped elements for low frequency applications where waveguide and planar implementations wouldn’t make sense. It is also interesting reading for those … Continue reading

Posted in Microwave Theory - Leave a comment

Video tutorials available

A demonstration of advanced filter synthesis concepts that can be applied to your future designs to meet the demand for stringent requirements. Couplings Designer makes it easy. Transmission zeros – the importance of transmission zeros and how they can be … Continue reading

Posted in News - Leave a comment

Couplings Designer Update 1.3

Releasing Couplings Designer 1.3 for iPhone and iPad! Get it at the App Store, new users may also want to try Couplings Designer Lite for free. Features – Tutorials – Documentation Features and bug fixes in this version:

Posted in News - 1 Comment

Couplings Designer Update 1.2

Releasing Couplings Designer 1.2 for iPhone and iPad! Features and bug fixes since the previous version: fixes a bug that made seeding new coupling matrices fail fixes a bug where the response plot was blank improved response plot Buy it … Continue reading

Posted in News - Leave a comment

Couplings Designer Update 1.1

Releasing Couplings Designer 1.1 for iPhone and iPad! Features and bug fixes since the previous version: iPad support (scaled up version) supports bandstop response prescribed transmission/reflection zeros predistortion easy sign-change of couplings Buy it at the App Store or try … Continue reading

Posted in News - Leave a comment