Bandwidth Enhancement of a Dual Band Planar Monopole Antenna Using Meandered Microstrip Feeding

Table 1

Comparison between the proposed antenna and some existing monopole dual band antennas.

Reference	Overall dimension, (mm^3)	Center frequency, (GHz)	Bandwidth, (MHz)	Fract. bandwidth (%)	Gain (dBi)	Relative dielectric const., 𝜀𝑟	Application
[7]	50×100×5	0.718, 1.9	50, 155	6.26, 8.16	−2.4, −0.64	4.55	RFID
[8]	50×30×1.6	2.45, 5.5	124, 1124	5.1, 22.4	1.9, 4.3	4.4	WLAN
[31]	25×50×1.6	2, 2.45	270, 140	13.6, 5.7	1.8, 1.3	4.4	PCS/WLAN
[12]	108×108×1.6	0.87, 2.45	220, 600	26.2, 22.2	3.5, 4.2	4.4	LTE/PCS
Proposed	40×50×2	0.9, 2.5	400, 700	44.4, 28	−1.18, 4.87	14	RFID/WLAN