“Many of InnoDev’s customers are also CST customers, and will benefit from the integration of CoupleFil into CST’s software range,” said Rony Füglistaller, cofounder ofInnoDev GmbH. By combining synthesis and simulations, users can get from specifications to tuned design more quickly, saving both time and money. A full 3D simulation can then be carried out to optimize the filter and to allow its performance to be calculated as constructed using a virtual prototype. Once CoupleFil has synthesized a filter, it can generate a 3D model of the design which can be exported directly into the 3D EM simulation tool CST STUDIO SUITE®. These requirements can include multiple pass-bands and arbitrary transmission and reflection zeroes. CoupleFil simplifies the process substantially by automatically calculating the necessary coupling matrix and suggesting filter topologies that match the user’s requirements. In traditional filter design, the tuning of the filter and placement of the transmission zeroes required both considerable analytic work to calculate filter coefficients and manual fine-tuning. Depending on their sign, they can also be employed for improving filter phase linearity. They are mostly employed for improving the filter selectivity by producing transmission zeroes. Cross-couplings (couplings between non-adjacent resonators) can be used to modify the filter transfer function. CoupleFil is a synthesis tool for designing cross-coupled bandpass filters, and will complement and extend CST’s workflows for simulating and optimizing filters.Ĭross-coupled filters are commonly used for high-frequency, high-performance applications where narrow passbands and steep roll-off are required, for example in telecom base stations and satellites. Computer Simulation Technology (CST®) announces that it has acquired all intellectual property of the CoupleFil software developed by InnoDev GmbH.
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