This book presents the practical design aspects of nonuniform line microstrip directional couplers and filters, and leads you through step-by-step procedures that enhance the performance of your circuits. Numerous design examples and verified measured results for ultrawide, bandpass, periodic, and codirectional couplers are provided. The book includes valuable applications rarely found in existing literature. Supported by 136 illustrations, 130 figures, 176 equations, and 109 references.