Horn Type

Polarizer

AR Bandwidth

Parameter’s Number

Pyramidal [proposed]

Gaussian Function

28%

4

Conical [2]

Stepped septum

18.6%

10

Pyramidal [3]

Stepped septum

5%

10

Corrugated conical [4]

Stepped septum

5%

10

Conical [5] [6]

Legendre, Sigmoid

20% & 25%

9, 10

Pyramidal [7]

Curve chiral metamaterial

0.8% & 1.4%

7

Corrugated conical, pyramidal [9] [10]

Crossed-dipoles

2.5% & 7.4%

6,10