Contents



Chapter 6 **Additive Manufacturing of 3D Printed Microwave Passive Components 93** Irene O. Saracho-Pantoja, José R. Montejo-Garai, Jorge A. Ruiz-Cruz and Jesús M. Rebollar



Preface

aspects.

This book is a self-contained collection of scholarly papers targeting audiences of practicing researchers, academics, postgraduate students, and other scientists whose works are related to microwave technologies. This book intends to provide readers with a comprehensive overview of the current state of the art in microwave technologies. This book is divided into 10 chapters. Chapter 1 is a general introduction that elucidates the principles of microwave and some of the microwave applications. Chapters 2 to 10 are written by several authors. These authors are researchers, scientists, and experts in specific research fields, which are related to microwave engineering. The editor would like to take this opportunity to thank all the authors for their valuable book chapter contribution. In fact, each chapter provides introduction on the specific microwave technology as well as detailed explanation of the methodology on how to solve the raised issues, which include both academic and industry

Chapters 2, 3, and 4 focus on the analytical models for fractal array antenna design, analyti‐ cal models of microwave resonance system for high-frequency material characterizations, and simulation modeling for biomedical devices and electromagnetic interference (EMI) measurement setup. Analytical analysis has played a very important role in the academic microwave engineering and industries. Engineers in microwave field will be able to under‐ stand the operating background of the microwave systems or devices through analytical analysis easily, as it is the fundamental knowledge in microwave system designs before en‐ tering into further application. Based on the analytical models, the time spent on microwave

Chapters 5, 6 and 7 include emerging microwave instruments and devices. Chapter 5 presents a potential of microwave energy for energy-efficient lighting application using elec‐ trodeless sulfur lamp. The electrodeless sulfur lamps with microwave excitation are durable and economical, and they can achieve photosynthetically active radiation (PAR) up to 70% to 80%, which is suitable for larger greenhouse complexes. Chapter 6 presents numerous examples of microwave passive devices made by 3D printing with metal plating. Recently, 3D printing integrated with computer-aided design (CAD) is able to provide relative high precision and rapid and significant cost saving (human resources and material cost) for mi‐ crowave device fabrication compared to the traditional machining. Chapter 7 presents the microwave imaging system for the concealed metallic forging object detection. The micro‐ wave imaging system is made up of Vivaldi antenna array (as sensors) and 3D holographic millimeter-wave algorithm (inverse scattering). In fact, microwave imaging has higher sensi‐ tivity with respect to metallic materials, which provides a high contrast of electrical proper‐

system (antennas, sensors, etc.) designs and measurement setup can be shortened.

ties between metallic and nonmetallic materials.

