Network model for capacitively fed microstrip element

A network model is presented for the capacitively fed microstrip antenna el ement. This element consists of a ground plane a radiating patch, and a sma ll patch located between the ground plane and radiating patch. The small pa tch is fed by a coaxial probe. The capacitive coupling between the patches allows the antenna to be matched. The network model is derived from a rigor ous solution. The relationship between the lumped components of the network model and the physical working mechanism of the structure is described.