New Design Method of UWB Microstrip Filters Using Adaptive Genetic Algorithms with Defected Ground Structures

Table 1

Dimensions (in mm) of DGSs with different resonant frequencies.

DGS structures	DGS (1)	DGS (2)
Case A	𝑅1=1,𝑅2=0.75,𝑅3=0.5	𝑅1=1
	𝐷1=6,𝐷2=4.3,𝐷3=1,	𝐷1=1
	𝐷4=2.6,𝐷5=4, 𝐷6=0.5,	𝐷2=3.3
	𝐷7=0.4,𝐷8=2.2	𝐷3=5
Case B	𝑅1=0.5,𝑅2=0.4,
	𝑅3=0.25,𝐷1=3.2,
	𝐷2=2.2, 𝐷3=0.5,
	𝐷4=1.3,𝐷5=2.2,
	𝐷6=0.25,𝐷7=0.2,
	𝐷8=1.1
Case C	𝑅1=2.25, 𝑅2=1.8,
	𝑅3=1.2,𝐷1=14,𝐷2=9.6,
	𝐷3=1.1,  𝐷4=5.8,𝐷5=9.4,
	𝐷6=0.55,𝐷7=0.9, 𝐷8=.5