Broadband Circularly Polarized CPW-Fed Monopole Antenna with a Via-Free CRLH-TL Unit Cell

Table 2

Comparison between various metamaterial antennas.

	Overall antenna size	Impedance bandwidth (%)	AR bandwidth (%)	Gain (dB)
This work	25 mm24 mm	79.5	56.2	2.53
[6]	43.5 mm43.5 mm	4.7	1.9	2.0
[7]	31 mm31 mm	4.6	1.46	0.96
[8]	24.8 mm22 mm	6.58	0.7	−1.1
[13]	50 mm50 mm	14.1	2.5	2.95
[14]	20 mm20 mm	10.86	2.54	2.02