Table 4 Gain & radiation efficiency comparison of the three antennas.

From: High performance antenna-on-chip inspired by SIW and metasurface technologies for THz band operation

Ant

Improvement in gain (dB)

Improvement in efficiency (%)

Ant. #2 vs. #1

1.8

10

Ant. #3 vs. #2

1.4

13

Ant. #3 vs. #1

3.2

23

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