Novel Technique of Gap Waveguide Cavity Resonator Sensor with High Resolution for Liquid Detection

Table 4

Comparison of the finalised sensor with the current methods for liquid characterisation.

REF.	Sensor technique	(GHZ)	Permittivity range studies	Mean sensitivity
[45]	MTM sensor; OLR conventional	2.6; 2.6	1–140; 1–140	0.27; 0.09
[46]	Loss-compensated SRR	1.156	1–80	-
[47]	Double SRR	1.86	2.2–22.5	0.07
[48]	SRR	1	1–45	0.002
[49]	λ/2	2.4	7.5–22	0.07
This work	GWCR	5.96	1–13	0.156