  A high Radio Analog Signal Processing (R-ASP) resolution transmission-type
(TT) phaser based on reflection-type (RT) phaser units is introduced,
theoretically studied and experimentally demonstrated. It is first shown that
RT phasers inherently exhibit higher R-ASP resolution than their TT
counterparts because their group delay swing is proportional to the reflection
coefficient associated with a resonator coupling mechanism (admittance
inverter), easy to maximize towards unity, rather than to a coupled-line
coupling coefficient, typically restricted to values will inferior to unity, as
in the RT case. Moreover, a detailed sensitivity analysis reveals that the
proposed phaser is simultaneously features high R-ASP resolution and low
sensitivity to fabrication tolerance, which makes it an ideal solution for
R-ASP. The proposed phaser exhibits a 5 ns group delay swing over a fractional
bandwidth of about 50% around 4 GHz.
