Novel Varactor-Loaded Phasing Line for Reflectarray Unit Cell with Large Reconfigurability Frequency Range - New Contributions in Information Systems and Technologies - page 6

Fig. 4. Simulated phase curves vs. C v for different frequencies (L s =5.2mm, L v =4.2 mm [9])
Fig. 5. Simulated phase curves vs. frequency for different diode capacitances C v
(comparison between linear stub and radial stub tuned cells)
As a further check on the validity of the proposed unit cell, the element radiation
pattern is evaluated at different frequencies belonging to the achieved reconfigurable
frequency range (Fig. 6). The depicted diagrams refers to a reflectarray element with a
radial phasing line loaded by a capacitance of 0.8 pF.
Fig. 6. Simulated H-plane radiation patterns for different frequencies