Miniaturized Circularly Polarized Implantable Antenna for ISM-Band Biomedical Devices

Table 3

Performance comparison of implantable antennas.

Ref.	Bands (MHz)	Axial ratio bandwidth (MHz)	Volume (mm^3)	Miniaturized methods
				Dielectric material	Shorting	Radiator structure
[5]	2400–2480	21	1402.4	Taconic	Yes	Capacitive loading
[6]	2400–2480	800	361.9	Rogers 3010	—	Capacitive loading
[7]	402–405	—	399.0	Alumina	Yes	Multilayer
[9]	402–405	—	643.0	Rogers 3210	Yes	-shaped patch and multilayer
[8]	402–405	—	10240.0	Rogers 3210	Yes	Spiral patch
[11]	902–928	161	248.9	Rogers 3010	Yes	Loop
[12]	902–928	—	486.4	FR4	Yes	J-shaped patch
This work	902–928	14	285.7	Rogers 3010	—	Loading stubs