Shape Deformation as a Tool for Miniaturization of 3D Printed Microwave Filters

The technological revolution initiated by the widespread accessibility of high-quality additive manufacturing (AM) technology proliferates rapidly in many areas of engineering. However, in microwave cavity filter design, we are often constrained in AM by the capabilities of design tools based on full-wave EM simulations that do not give one the modeling flexibility that is 100% compatible with the flexibility of the 3D printing technology. Even if an underlying numerical technique for solving Maxwell equations is fully general and capable of handling arbitrary shapes, in the design process, we often involve only a basic constructive solid geometry approach (CSG), which is a limiting factor to develop truly arbitrary, smooth, and parameterized surfaces of cavity resonators and filters. In this talk, we will focus on a novel paradigm of microwave filter design that involves shape deformation techniques. Such techniques give a designer an extra degree of freedom in filter modeling, allowing one to improve the electromagnetic performance of the component. Finally, we will discuss the advantages of shape deformation and show some of the recently developed filters for satellite communication systems with improved out-of-band performance.