The usefulness of using terahertz radiation has been proven in practice. Recently we have studied how to manufacture and use silicon waveguides and obtained insignificant signal loss. Final purpose is creating the integrated  photonic circuit which needs not only straight waveguide sections, which we have done before, but bend structures with minimal signal loss, which we present in this paper. The insertion loss of the structure we made is ~0.178 dB ±  0.081 dB at frequency of 145.5 GHz. This result is simulated and experimentally verified. This once again proves that it is possible to create a full-fledged design that has a lot of practical applications. It is a future of communication  systems, medicine and artificial intelligence development. Eventually we will be able to create a physical structure that will be a hardware implementation of an artificial neural network with extremely low power consumption.