Lumped element quadrature hybrids Annotation Quadrature hybrids are passive circuit elements that are used in a wide range of RF and microwave applications and this cutting edge book is the first resource to provide engineers with a solid understanding of their characteristics and design. The book helps professionals use lumped element quadrature hybrids to achieve extremely wide bandwidth operation. This hands on volume provides detailed construction techniques with worked examples and describes the synthesis of circuits using practical circuit topologies. Moreover the book discusses a wide range of related topics including active circuits weak couplers non quadrature dividers and tips on using graphical techniques. This comprehensive reference is thoroughly supported with over 225 illustrations and more than 200 equations