Circularly Polarized Wearable Antenna Based on NinjaFlex-Embedded Conductive Fabric

Table 2

Comparison of flexible antennas reported in the literature.

Ref.	Substrate	Conductor	Peak gain (dBi)	BW (%)	Max ∆f (%)	Efficiency (%)	ARBW (MHz)	Washability
[3]	EVA	Copper gauze	4.36	5.2	1.2	51	—	No
[15]	NinjaFlex	Copper	−3.8	5.5	3	18	—	No
[19]	SU-8/PDMS	Copper	2.17	3	5.8	—	—	No
This	NinjaFlex	Silver fabric	1.8	11	3.1	30.7	70	Yes