Hybrid-cascade Coupled-Line Phasers for High-resolution Radio-Analog   Signal Processing
  A hybrid-cascade (HC) coupled-line phaser configuration is presented to synthesize enhanced group delay responses for high-resolution Radio-Analog Signal Processing (R-ASP). Using exact analytical transfer functions, the superiority of HC coupled-line phasers over conventional transversally cascaded C-section phasers is demonstrated and verified using full-wave simulations. 
T. Paradis, S. Gupta, Q. Zhang, L. J. Jiang, and C. Caloz
physics.ins-det physics.optics