Advanced high-frequency filter design tool
17 September 2008
Design Automation
AWR’s Microwave Office high-frequency design suite now fully exploits what is said to be a breakthrough in filter design recently released from its partner Nuhertz Technologies, whose filter synthesis and analysis software, Nuhertz Filter, can be seamlessly integrated within Microwave Office software. This breakthrough, called ‘delay equalisation with off-axis quadruplet and real zeros’ is said to reduce from hours to seconds the computation time required to obtain flat group delay response in quadruplet zeros delay equalised lumped element filters.
Obtaining flat group delay response to ensure that all frequencies arrive at the same time within a filter’s passband is one of the most critical aspects of good filter design and is essential in order to obtain distortion-free performance. Controlling group delay efficiently has been a major challenge for industry and academia for decades and many advancements and algorithms have been developed to more efficiently control group delay in band-pass filters by cross-coupling resonators. However, low-pass and high-pass filters require massive, time-consuming computer optimisations to synthesise the required component values when efficient quadruplet zeros are employed.
Nuhertz has developed a direct-synthesis strategy for determining the element values that control low-pass or high-pass quadruplet zeros controlled group delay that reduces computation time while eliminating unnecessary circuit components that result from traditional equalisation techniques.
Nuhertz Technologies, LLC, based in Phoenix, AZ, is an innovative world leader in low and high-frequency filter synthesis and analysis software tools that has developed numerous revolutionary synthesis algorithms. Its products provide productivity and performance improvements not possible with any other design system within a straightforward yet comprehensive user interface. For more information visit www.nuhertz.com
For more information visit www.awrcorp.com, www.nuhertz.com
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