Broadband Multipolarized Reconfigurable Unit Cell for Reflectarray Antennas with One Bit Control

Table 2

Comparison of unit cells with 1-bit control using PIN diodes.

Ref./Year	f (GHz)/BW	No of PIN diodes	No of substrates/thickness (mm)	|Γ| ON/OFF (dB)	Polarization
[26]/2016	13.5–15; 10.5%	2	2, NP	−0.5 to −1; −0.3 to −0.7	DL, CP
[28]/2016	12–−14.5; 18.8%	4	4, NP	−0.5 to −1; −0.5 to 1	DL, CP, RP
[31]/2019	4.7–−5.3; 12%	1	2, 2.7	−0.1 to −0.9; −0.1 to −0.9	SL
[35]/2021	11.6–14.3; 20.8%	2	3, 3.357	1.1.6	SL
This work	10.4-15.7; 40.6%	4	2, 3.405	−0.9 to −1.4; 0.05	DL, CP

The criterion for BW is the phase difference of 180^o ± 20^o. NP : not published, SL : single linear polarization, DL : dual linear polarization, CP : circular polarization, and PR : polarization rotation. Values in bold highlight our proposed work.