More recently, some authors have proposed a technology based on waveguide technology that is compatible with integrated planar circuits, the so-called empty substrate integrated waveguide (ESIW). This technology is a good trade-off between the benefits of waveguides, having low losses and high power handling capability, and planar circuits, offering tight integration and low cost. Over the past two decades, substrate integrated waveguide (SIW) technology has been used to develop filters at high frequencies. The function of such a device is to filter a signal’s spectrum, generally while also maintaining the integrity and avoiding thermal noise and unwanted interference. Most modern wireless systems require electromagnetic (EM) filters: cellular base stations, satellite telecommunications, radar systems, etc. We apply these workflows to the design of filters based on Substrate Integrated Waveguide (SIW) and Empty Substrate Integrated Waveguide (ESIW) technology. In this blog post, we show how to combine different tools and techniques within the SIMULIA CST Studio Suite® environment to design microwave filters.
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