This paper presents a metal-only reflectarray antenna made of 3D phoenix cells and its fabrication using additive manufacturing. An electric circuit is proposed for analyzing the behavior and capabilities of the considered cell. The agreement between full-wave simulations and the circuit predictions is very satisfactory when varying the cell geometrical parameters on a large range of values. The simulated gain of the designed reflectarray at 20 GHz is 30.2 dBi with an efficiency of 49.3% and a 1 dB-gain bandwidth of 17.5%. The proposed reflectarray is suitable for working in severe environments due to its metal-only characteristics.

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This paper presents a detailed analysis of the effect of the height of the 3D Phoenix Cell on the performance of Metal-Only Reflectarray Antennas. An improved design approach is proposed and a 18% bandwidth (for gain variations less than 1 dB) is obtained after the optimization.

This paper presents a dual band metal-only antenna that operates at 20/40GHz. The proposed metal-only antenna combines the functionalities of reflectarray and parabolic reflector antennas. The unit cell consists of a square waveguide with short circuit termination and a square metallic block in the center. At 20GHz, the reflected beam is determined by a parabolic surface. At 40GHz, the reflected beam is controlled by the phase distribution of cells in the antenna. The gain increases with frequency in the lower frequency band, which is similar to what happens in a parabolic reflector antenna. The aperture efficiency at 20/40GHz is about 22.99/43.79%.

This paper presents a Metal-Only reflectarray antenna generating two independent beams with orthogonal linear polarizations. Such reflecctarray is based on a dual polarized cell that allows to control the reflection phase of incident waves independently in both polarizations. The simulated gains of the two beams at 25 GHz are 30.77 dBi and 30.14 dBi respectively.