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

Table 3

Comparison of the stated sensor with lately published outcomes for both ethanol and methanol at 6.1 GHz.

LUT	Proposed sensor								Conventional sensors
	ε′				tanδ				[41]		[42]
	f (GHz)	Curve	Derivation	Error (%)	QL	Curve	Derivation	Error (%)	ε′	tanδ	ε′	tanδ
Air	6.0475	0.9600	0.9280	3.3000	972.8500	0.0430	0.0448	4	—	—	—	—
Ethanol	6.0100	4.4600	4.5866	2.7600	66.8150	0.8730	0.8730	0	4.5000	0.8700	—	—
Methanol	5.9675	11.0600	11.1000	0.3600	14.4100	0.9010	0.9010	0	—	—	11.1000	0.9000