The last sentence on page 16 seems to be me a little detached. A better way to phrase the last two sentences might be:
" Not considered in this section due to the complexity of the calculations, unequal source and load impedances, which may be matched using an attenuator section. "
" Not considered in this section due to the complexity of the calculations, unequal source and load impedances, which may be matched using an attenuator section. "