  A planar reflective phaser based on an open-ended edge-coupled-line structure
is proposed. This phaser is the first reported phaser that combines the
benefits of high resolution, inherent to cross-coupled resonator reflective
phasers, and of compactness, inherent to planar circuits. A 4-ns swing 4.9-5.5
GHz quadratic phase (linear group delay) 4th-order microstrip phaser is
synthesized and experimentally demonstrated. Given its advantages, this phaser
may find vast applications in Radio Analog Signal Processing (R-ASP) systems.
