Announcing Sionna v0.18

[jhoydis]

Ray tracing

• Adds support for reconfigurable intelligent surfaces (RIS). Exact paths as well as coverage maps can be computed.
• New “Tutorial on Reconfigurable Intelligent Surfaces” notebook
• New section in the EM Primer on Reconfigurable Intelligent Surfaces

Misc

• Fixes scaling of the antenna positions of planar arrays with the frequency (#470, #400)
• Fixes support of non-CUDA GPUs in Sionna RT (#464)
• Fixes an issue accessing the positions of SceneObjects (#449)
• Fixes deprecated matplotlib function used in coverage maps (#444)
• Fixes typos in the “5G NR PUSCH Tutorial Notebook”
• Fixes a bug in the detection of wedges on CPU (#347, contribution by @AinurZiga)
• Fixes crash of mobility notebook in Google Colab (#422)
• Updates to the Makefile and Dockerfile (#309)