An OBFN system has an infrastructure based on optical devices such as splitters, combiners, bends, delay lines, phase shifters, switches, waveguides, filters and Mach–Zehnder structure. In the optical beam forming networks, there are limitations such as bandwidth and integration capability. There are various methods to overcome these problems, for example using the optical ring resonators due to their advantages such as broad bandwidth and continuous tunability. In this research, the main focus is on the design and analysis of OBFN devices using photonic crystals. By using the PTS nonlinear material, we have proposed meandering delay line structures, switches, bends, filters, splitters, combiners and etc. in nonlinear photonic crystals to make OBFN devices. PTS shows a large nonlinear refractive index in the Kerr’s effect, therefore it exhibits slow light phenomenon in the PTS-based devices interacting with incident light. In the otherwise, the PTS material provides slow light propagation in the waveguide consequently confines propagating light when it travels through a meandering path. Keywords: Optical Beam Forming, Delay Line, Photonic Crystals (PCs), Mach–Zehnder, Filter
