This paper investigates a shifting sensing scheme combining slots, transmission lines, and printing technologies. translates the electrical sensitivity of line conductor to insertion phase as measurement variable. A coplanar waveguide (CPW) based structure was designed, screen-printed, tested on relative humidity (RH) conditions ranging from 22.8 - 75.3 %RH. For first time, composite material m...

The measurement accuracy of an interferometric optical test is generally limited by the environment. This paper discusses two single-shot interferometric techniques for reducing the sensitivity of an optical test to vibration; simultaneous phase-shifting interferometry and a special form of spatial carrier interferometry utilizing a micropolarizer phase-shifting array. In both techniques averag...

We show a practical way for building wideband phase-shifting algorithms for interferometry. The idea presented combines first- and second-order quadrature filters to obtain wideband phase-shifting algorithms. These first- and second-order quadrature filters are analogous to the first- and second-order filters commonly used in communications engineering, named building blocks. We present a syste...