دانلود کتاب Dielectric Resonator Antennas (Antennas Series) (Antennas)

This book presents a detailed study of Dielectric Resonator Antennas, describing technology that is impacting increasingly upon the design of modern communications systems. Potential applications of DRAs include mobile communication systems, wireless local loops, global positioning systems and millimeter-wave indoor wireless LANs. The use of dielectric resonator as a resonant antenna was proposed in 1983. Due to the absence of metallic loss, the dielectric resonator antenna is highly efficient when operated at millimeter wave frequencies. With the use of high dielectric constant material, the DRA can also be used as a small and low profile antenna operated at low microwave frequencies. Low cost dielectric materials are now easily available commercially, encouraging more antenna engineers to design communication systems with DRAs. Although DRAs are very promising in practical applications, surprisingly, no reference book or edited book summarizing the research results on DRAs is available in the literature. Actually, more than 130 articles on the design and analysis of DRAs can be found in international journals and conference proceedings. It is the objective of the proposed book to update and to present new information on DRAs.