Single-layer dual-frequency reflectarray for Ka-band antennas

Millimeter-Wave Single-Layer Dual-Frequency Reflectarray Antenna

“…This principle is the basis of [12,13], and a number of alternative elements for single polarization have already been described in [15]. This principle has to be extended for a dual-frequency antenna and adjust the array elements independently for the two frequencies, for example, 20 and 30 GHz.…”

“…Finally, in [11], the reflector elements are switched between operating frequencies by p-i-n diodes. Recently, two methods of single-layer dual-frequency reflectarray antennas have been presented [12,13].…”

“…This antenna needs an offset feed in front of the reflectors. The applied principle is similar to that used in [12,13]. As example frequencies, 20 and 30 GHz have been selected [14].…”

Analysis of substrateintegrated frequency selective surface antenna for IoT applications

“…This electron oscillation will in turn start producing its own EM fields thus functioning as an array of tiny radiating antenna. A frequency selective response is produced when the metallic element interfers with the plane wave which is incidented [2][3][4][5][6][7][8].…”

Dual-Frequency Reflectarray Cell to Provide Opposite Phase Shift in Dual Circular Polarization With Application in Multibeam Satellite Antennas

“…Other concepts are based on stacked reflectarray layers operating at different frequencies [15]. Several single-layer reflectarrays that operate at Tx and Rx in Ka-band have been proposed [16]- [18] using multiresonant elements. None of the previous works allows to implement an independent phase control in each polarization, either because of the symmetry of the printed elements [16] or because the VRT is used to focus the beam in a single CP [17], [18].…”