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:

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 →

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 →

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 →

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 →

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:

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 →

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 →

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 … Continue reading →

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.   … Continue reading →