Wide CPW-Fed Multiband Wearable Monopole Antenna with Extended Grounds for GSM/WLAN/WiMAX Applications

Table 7

Comparison of the proposed antenna with existing literature.

Ref.	Size (mm^3)	Frequency (GHz)	BW (MHz/%)	Gain/directivity (dB or dBi)	Radiation efficiency (%)	SAR (W/kg)
[1]		2.4	660	7.8 dBi	—	0.0138
[2]		2.4	157	2.0 dB	45	0.0500
[4]		5.4	52.96%	9.67 dBi	—	—
[5]		5.7	—	6.49 dB	59	0.0043
[6]		2.45	458	3.9 dB	85	—
		5.8	590	4.6 dB	90	—
[7]		0.9	—	8.1 dBi	20.5	0.0011
		1.8	—	7.4 dBi	10.3	0.0034
[8]		5.2	4.07%	7.9 dB	90	0.0646
		5.8	4.16%	8.2 dB	90	0.0258
[9]		2.46	648	1.68 dBi	91.6	—
		5.48	1378	1.64 dBi	91.6	—
[10]		2.45	84	4.16 dBi	63.5	0.248
		5.8	247	4.34 dBi	53	0.091
[11]		0.9	—	2.0 dBi at all bands	41.6	—
		1.9	—		75.8	—
		2.45	—		65.6	—
[12]		1.55	—	>1.6 dB at all bands	>50 at all bands	0.78
		1.95	—			0.62
		2.1	—			0.58
[13]		1.8	320	4.91 dBi	92.45	0.019
		2.4	60	7.84 dBi	75.22	0.358
		3.6	80	2.58 dBi	63.26	0.566
		5.5	180	4.12 dBi	88.95	0.798
Proposed antenna		1.78	410	4.17 dBi	94.71	0.2293
		2.40	260	3.81 dBi	93.42	0.3892
		3.46	170	2.60 dBi	90.52	0.4640
		5.26	520	2.74 dBi	83.97	0.2535