Ultrawideband Harmonic Suppression in Microstrip Patch Antenna Using Novel Defected Ground Structures

Table 2

Comparison between this work and references.

Ref.	Fundamental freq. (GHz)	No. of harmonics supp.	DGS used	Extracircuit	DGS area ( × 10^4)
[8]	5.775	3	2 square dumbbell	No	108
[9]	1.79	2	1 square dumbbell	PBG	120
[10]	0.9	3	2 square dumbbell	PBG	891
[11]	3.12	4	2 circular dumbbell	Open stub	102
[12]	3.125	4	2 partial ring	Open stub	63
[13]	2.43	5	2 I-shaped DGS	Open stub	149
This work	3.13	6	Novel DGS	Open stub	36