Design fabrication and test of an X-band dual polarized aperture-coupled reflectarray element for beam switching

Abstract

Abstract:In this paper a dual polarized aperture-coupled reflectarray unit cell is designed, fabricated, and tested. The element is based on patches aperture-coupled to delay lines. This unit cell has the capability of switching the beam direction in two orthogonal polarizations using a PIN diode or MEMS switch by changing the length of the transmission line coupled to the patch. The proposed structure is used in the design of an X-band reflectarray antenna in two states having angles off broadside of 0• and 10• .

Design and fabrication of a dual-polarized, dual-band reflectarray using optimal phase distribution

“…Apart from conventional reflector antennas, the aperture field distribution on the reflecting surface of an RA can be engineered only by tailoring the phasing elements. This leads to developing broadband, multiband, dual, and circular polarized RAs or advanced passive and active RA configurations with beam shaping, beam scanning, nonlinear, and beam switching capabilities, which are well suited for several applications [1][2][3][4][5][6][7][8][9][10]. In advanced designs, the reflector platform can be incorporated with horn array antennas and develop a high gain multifunction structure, which is feasible only by adjusting the phase response of the unit cells for each horn antenna [11].…”

Design and Simulation of a Reflectarray Antenna using New Cell for Different Beam Angles

“…The reflection phase from the reflectarray elements are designed so that the reflected energy from the array is collimated to form a main beam in a given direction or to generate a shaped beam in the coverage area. The phase of the reflected field can be changed by varying the size of the resonating patches [1,2], by a transmission line of proper length connected [3,4] or aperture-coupled to the patches [5][6][7], or adding active elements to the antenna [8][9][10][11] like MEMs-based structures [12], varactor loaded patches [13,14], PIN diodes [15][16][17][18][19][20][21] or liquid crystal based structures [22].…”