A Triband Compact Antenna for Wireless Applications

Table 4

Performance comparison of the proposed antenna with the existing work.

Ref	Technique used	Size (mm^3)	Material and permittivity	Gain (dBi)	Bandwidth (MHz)	Number of frequency band	Resonant frequencies (GHz)	Return loss (dB)
[5]	Defected ground plane	83 × 56 × 1.56	FR4, 4	3.88, 3.87 & 3.83	380, 190 & 300	3	2.47, 3.55 & 5.55	20.8, 14.9 & 17.3
[11]	SRR–CSRR–SIW rectangular resonator antenna based on a composite right/left-handed transmission line	24.5 × 30 × 0.508	Rogers RT/Duroid 5880, 2.2	5.33 & 5.25	30 & 80	2	5.26 & 9.11	16 & 19
[12]	Defective ground structure	34 × 30 × 1.6	FR4, 4	2.017, 2.994 & −3.362	190, 120 & 90	3	2.40, 3.50 & 5.80	15.4, 12.8 & 15.2
[18]	Composite right/Left handed transmission line based antenna	34.1 × 9.9 × 1.6	FR4, 4	1.51 & 1.94	200 & 610	2	2.72 & 5.51	25, 33
[20]	7 element antenna structure	32 × 32 × 0.79	Rogers RT 5880, 2.2	3.90	1400	1	3.592	46.78
[21]	Sigma shaped patch and slotted ground plane	29 × 29 × 1.6	FR4, 4	4.76	190	1	5.8	21
Proposed	Defective microstrip structure, defective ground structure	35 × 35 × 1.6	FR4, 4	2.79, 2.51 & 2.64	400, 490 & 420	3	3, 6 & 7	29.64, 26.37 & 27.58