Table 2.

Comparison with the recent phase correcting structures.

Publication	No. of microwave substrates	Weight (g)	Peak directivity(dB)	3dB directivity bandwidth	Aperture efficiency	Cost of fabrication
TAP, 20158	8	335	21.6	8%	29%	Very high
TAP, 201612	3	190	20.2	6.4%	26%	Very high
AWPL, 201714	3	193	21.1	11.8%	26%	Very high
MAP, 201711	3	–	20.5	$\approx 3\%$	81.8%	Very high
AWPL, 201810	2	250	22	7%	28%	Very high
TAP, 202015	None	87	20.2	9%	28%	Very low
This work	None	30	20.9	25%	66%	Very low

TAP IEEE transactions on antennas and propagation, AWPL antennas and wireless propagation letters, MAP IET microwaves, antennas & propagation