In many communication systems, isolators and circulators are of fundamental importance, as they protect sources from self-interference and allow full-duplex functionality. In lay terms, circulators enable transmission and receipt of signals in the same frequency channel at the same time. At present, this operation can only be achieved with magnetic devices, which are bulky, heavy, expensive, and cannot be integrated on a chip. Silicon Audio is applying its core competencies and mechanical and electrical engineering capabilities to realize full-duplex functionality based on circulators without the use of magnets, creating the potential for novel applications using a new generation of magnet-free circulators.
Silicon Audio is developing magnet-free, passive, linear, noise-free, parametric circulators that can be integrated on-chip. These radio-wave devices have the potential to replace magnetic circulators and to revolutionize radar and wireless applications with on-chip circulator embodiments.
Silicon Audio is also developing unique acoustic circulators which are able to route sound waves in a non-reciprocal fashion from audible to ultrasound frequencies. Such devices have potential implications for noise cancellation, medical imaging, and sonar applications.