Rectangular DRA fundamental  background -- Rectangular DRA resonant modes and sources -- Mathematical analysis of Rectangular DRA -- Mathematical analysis of transcendental equation in rectangular DRA.-  Mathematical analysis of  RDRA amplitude coefficients -- Mathematical analysis of radiation pattern of RDRA -- Rectangular DRA  higher order modes and experimentations -- RDRA in  input  angular excitation mathematical model and resonant  modes -- Sensitivity Analysis Rectangular  DRA -- Hybrid modes in RDRA -- Inhomogeneous permittivity, permeability and conductivity solution in rectangular DRA -- Case Study 1-Structure and hardware experimentations -- Case Study 2-RDRA with manganese- manganese material as dielectric -- Case Study 3-Dual feed RDRA hardware and measurements -- Case Study 4-Isolated and Grounded RDRA -- Annexure 1-Details of Dielectric materials and their suppliers -- Annexure 2-Two dimensional mathematical model of resonant modes in cavity resonator -- Annexure 3-Design steps of RDRA using  A.D.S software -- Annexure 4-Resonating Modes in Rectangular Resonators -- Annexure 5-Resonant mode generation and control  in RDRA -- Annexure 6-Cartesian, cylindrical and spherical coordinate system -- References -- Index Terms.