Table 3 Proposed antenna comparison with references.

From: Implantable small ultra-wideband circularly polarized antenna design for continuous blood pressure monitoring

Ref.

Dimensions (λ0 × λ0 × λ0)

Fre. (MHz)

SAR (1−g)

BW (MHz)

Gain (dBi)

CCP

AARBW

26

0.093 × 0.046 × 0.0001

915

202

900

− 34

No

28

0.025 × π2 × 0.0102

2450

856.4

400

− 37.3

Yes

22%

29

0.028 × 0.028 × 0.0012

1400

2450

256.9

152.6

240

313

− 32.7

− 25.9

Yes

11.4%

30

0.028 × 0.028 × 0.003

860

1850

2450

428

438

382

135

139

458

− 31.8

− 21.8

− 18.5

Yes

23.85%

1.37%

7.26%

33

0.03 × 0.03 × 0.007

920

552

800

− 23.3

Yes

21.87%

34

0.041 × 0.041 × 0.002

1400

2450

178.2

122.1

180

640

− 23.4

− 16

Yes

9.7%

15%

This work

0.056 × 0.04 × 0.004

2450

652.3

1400

− 28.8

Yes

23.6%