Axial Ratio-Tuned Circularly Polarized Square Patch Antenna with Long Stubs

Table 1

Comparison of conventional single-feed circularly polarized antennas.

Ant.	10 dB BW	3 dB AR BW	Size	Height	Gain
This work	1.2%	2.3%		1.6 mm	3.6 dBi
[13]	10.9%	2.8%		20 mm	4.75 dBi
[15]	6.1%	1.6%		1.52 mm	2.5 dBi
[16]	4.01%	1.2%		4.8 mm	0.5 dBic
[17]	3.8%	0.8%		4.5 mm	4.55 dBi
[14]	20.81%	2.6%		15.6 mm	6.9 dBi
[18]	4.3%	2.1%		1.6 mm	4.5 dBic