Richard Rudd was the lead author for a paper on the development of the new ITU-R model for building entry loss. This paper describes the derivation and form of the new model and highlights work that remains to be done in this area. The ITU-R has recently published a new recommendation giving a method for the estimation of building entry loss at frequencies between 100 MHz and 100 GHz.
The paper was presented at the EUCAP 2018 conference and was published by the IET. It can be accessed below.