A High-Resolution Transmission-Type (TT) Phaser Based on Reflection-Type (RT) Units for Radio Analog Signal Processing (R-ASP)

摘要

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 thatRT phasers inherently exhibit higher R-ASP resolution than their TTcounterparts because their group delay swing is proportional to the reflectioncoefficient associated with a resonator coupling mechanism (admittanceinverter), easy to maximize towards unity, rather than to a coupled-linecoupling coefficient, typically restricted to values will inferior to unity, asin the RT case. Moreover, a detailed sensitivity analysis reveals that theproposed phaser is simultaneously features high R-ASP resolution and lowsensitivity to fabrication tolerance, which makes it an ideal solution forR-ASP. The proposed phaser exhibits a 5 ns group delay swing over a fractionalbandwidth of about 50% around 4 GHz.