The application of a 3D domain decomposition finite-element and spherical mode expansion for the design of planar ESPAR (electronically steerable passive array radiator) made with probe-fed circular microstrip patches is presented in this work. A global generalized scattering matrix (GSM) in terms of spherical modes is obtained analytically from the GSM of the isolated patches by usin... https://www.roneverhart.com/Milwaukee-2981-20-M18-FUEL-4-1-2-in-6-in-Lock-On-Braking-Grinder-with-Slide-Switch/