Optimization of a 12.5 GHz Microstrip Antenna Array Using Taguchi's Method

Table 4

The analysis of variance (ANOVA) table.

(a) General linear model: 12.5 GHz antenna array versus A; B; C; D; E

Factor	Type	Levels	Values
A	Fixed	3	1; 2; 3
B	Fixed	3	1; 2; 3
C	Fixed	3	1; 2; 3
D	Fixed	3	1; 2; 3
E	Fixed	3	1; 2; 3

(b) Analysis of variance for 12.5 GHz antenna array, using adjusted SS for tests

Source	DF; degrees of freedom	Seq SS; Seq/al sums squares	Adj SS; adjusted sums squares	Adj MS; adjusted means squares	F; 𝐹-statist Adj MS/P	P; 𝑃-value
A	2	1340	1340	670	0.05	0.950
B	2	1592002	1592002	796001	61.68	0.000
C	2	230663	230663	15332	8.94	0.002
D	2	776	776	388	0.03	0.970
E	2	3383	3383	1691	0.13	0.878
Error	16	206484	206484	12905
Total	26	2034648

S = 113.601 R-Sq = 89.85% R-Sq(adj) = 83.51%