Microwave sensors based on electrically small planar resonant elements are reviewed in
this paper. By virtue of the high sensitivity of such resonators to the properties of their …

This article reviews some recent strategies for sensitivity optimization in planar microwave
sensors operating at a single frequency, namely, phase-variation sensors and magnitude …

A microfluidic sensor based on a microstrip line loaded with a composite resonator is
reported in this paper. The composite resonator combines a shunt connected step …

This paper presents a highly sensitive phase-variation sensor for dielectric constant
measurements based on a capacitively-loaded periodic slow-wave transmission line. Such …

This paper presents a single-frequency reflective-mode phase-variation microwave sensor
devoted to the dielectric characterization of materials. The device is implemented in …

Highly sensitive permittivity sensors operating in reflection and exploiting phase variation
are presented in this article. The sensors are one-port structures implemented by means of a …

This article presents an exhaustive study of the sensitivity in reflective-mode phase-variation
sensors based on an open-ended transmission line with a step-impedance discontinuity …

This article presents a technique based on a modified complementary split-ring resonator
(CSRR) to detect angular displacement and direction of rotation with high resolution and …

A phase variation-based rotation sensor is presented in this article. The sensor is realized
using a coplanar waveguide (CPW) terminated with a stepped impedance resonator. A …

This article presents a small-sized and highly sensitive planar microwave permittivity sensor
based on a pair of weakly coupled step-impedance resonators (SIRs), the sensing elements …