Explicit symmetry breaking in electrodynamic systems and electromagnetic radiation This book is an introduction to the concept of symmetries in electromagnetism and explicit symmetry breaking. It begins with a brief background on the origin of the concept of symmetry and its meaning in fields such as architecture mathematics and physics. Despite the extensive developments of symmetry in these fields it has yet to be applied to the context of classical electromagnetism and related engineering applications. This book unravels the beauty and excitement of this area to scientists 5. Explicit symmetry breaking and dielectric antennas 5.1. Phenomenological challenges in the dielectric resonator antenna 5.2. Symmetry breaking in dielectric resonator antennas 6. Piezoelectric antennas Preface 1. Introduction 2. Symmetries and conservation theorems 2.1. Symmetry : a brief historical introduction 2.2. Symmetry in science 2.3. Symmetries in dynamic systems 2.4. From symmetry to gauge theory 2.5. Conclusion 4. Explicit symmetry breaking and electromagnetic radiation 4.1. Explicit symmetry breaking of electrodynamic systems 4.2. Electromagnetic radiation under non conserved Noether current 4.3. Explicit symmetry breaking and free electron lasers 4.4. Electromagnetic radiation under explicit symmetry breaking of filter circuits 3. Spontaneous symmetry breaking 3.1. Symmetry breaking 3.2. Historical overview and early evolution 3.3. Symmetry breaking in particle physics 3.4. Condensed matter superfluidity and Bose Einstein condensate 3.5. Spontaneously broken global symmetry 3.6. Higgs mechanism 7. Radiation from a superconducting loop 7.1. Superconducting antennas 7.2. Experimental setup 7.3. Results 7.4. Analysis 8. Conclusion and future work