Comparing H-Line Cantenna Dimensions different diameters of the can

Key messages from above table:

The probe length does not change with cantenna diameter at the same design frequency.

The overall can length goes down with increase in diameter.

The distance from the probe to bottom of the can decreases with increase in diameter.

The lower cut-off frequencies (both H11 mode and E01 mode) decrease as the diameter increases, even when design frequency does not change.

The radius of the horn section increases as the diameter of the cantenna increases.