ANN Synthesis Model of Single-Feed Corner-Truncated Circularly Polarized Microstrip Antenna with an Air Gap for Wideband Applications

Table 4

Comparisons of results of MLP-based synthesis model and HFSS simulation.

Air gaps	Substrate materials			Required frequency	Outputs of synthesis model		HFSS simulation		|𝑓0−𝑓𝑠|/𝑓0 (%)
𝐻𝑎 (mm)	𝐻𝑑 (mm)	𝜀𝑟	tan𝛿	𝑓0 (GHz)	𝐿 (mm)	𝐿𝑡 (mm)	𝑓𝑠 (GHz)	AR𝑠 (dB)
0.25	3.50	10.2	0.0023	1.000	54.70	4.25	1.019	0.90	1.90
				2.000	25.69	2.73	2.008	1.07	0.40
				3.000	16.05	2.13	2.957	0.53	1.43
0.50	2.50	4.50	0.0020	1.000	84.09	7.26	1.010	1.81	1.00
				2.000	40.48	4.77	2.014	1.35	0.70
				3.000	26.03	3.77	3.008	0.69	0.27
				4.000	18.85	3.18	3.980	0.30	0.50
				5.000	14.63	2.79	4.922	1.50	1.56