A Triband Compact Antenna for Wireless Applications

Table 2

Resonant frequency and return loss values by varying ground plane length (L) of the patch antenna with SRR structure.

Ground plane length	First resonance		Second resonance		Third resonance
	Frequency (GHz)	Return loss (dB)	Frequency (GHz)	Return loss (dB)	Frequency (GHz)	Return loss (dB)
3 L/4	2	11.36	—	—	—	—
L/2	7.3	15.59	8.7	21.96	—	—
L/4	2.8	15.14	5.7	14.77	6.8	22.26