Choice of WDF Topology

Summarizing points above,

• Generally try to make a Binary Connection Tree (BCT) using only three-port adaptors
• At the root of the tree, include all
  • nonlinearities
  • non-adaptable elements such as switches
• When everything is linear and adaptable, place a time-varying element at the root, to minimize update propagation when that element changes
• When multiple elements are at the root, or when topology is not merely series + parallel connections, there will generally be at least one $R$ node