Topics include design and construction of ultrawideband directional couplers, bandpass nonuniform line directional couplers and filters, periodic nonuniform line coupler-filters and multiplexers, and codirectional nonuniform line directional couplers. Directly applicable graphical data and a large number of design examples are provided for the needs of development and contract engineers. This is the first book to document the real design aspects of nonuniform line directional couplers.