"Must reading" for every microwave and communications systems engineer, this first-of-its-kind book provides an excellent overview of coupled line fundamentals and explains their applications in designing microwave and millimeter-wave components used in today's personal communication, audio/visual, microwave, radar, satellite communications, and other systems. This unique book provides you with a thorough understanding of stripline, microstrip, monolithic, and coplanar technologies. Emphasizing design, analysis, and modern fabrication techniques and practices, it provides invaluable knowledge and guidance in helping you develop compact and low-cost design solutions and components such as loose and tight couplers, filters, hybrids, transformers, and baluns. Featuring more than 400 design equations, this comprehensive book serves as a consolidated resource of classic and cutting-edge information on coupled structures and will surely prove to be one of the most relied-upon resources for microwave circuit design engineers, researchers, and students.