표 2. | Table 2. 주요 성능 파라미터 비교 | Comparison of the main performance parameters of proposed feeding structure.

Parameter	Ref. [13]	Proposed structure
Thickness	1.8 mm (W/o control layer)	2.25 mm (W/ control layer)
Feeding slot layer	Single layer	Multi layer
Feeding isolation sturucture	Metal wall, slot shape	Slot shape
−10 dB BW	600 MHz	1.5 GHz
Isolation	Better than 20 dB	Better than 40 dB
Antenna gain	5 dBi	5.8 dBi