Realization and Measurement of Broadside Beam Modulated Metasurface Antennas

Dispersion Properties of an Elliptical Patch with Cross-Shaped Aperture for Synchronized Propagation of Transverse Magnetic and Electric Surface Waves

“…As it is well known [4][5][6][7][8][9][10][11][12][13][14][15][16][17], guiding metasurfaces (MTSs) support the propagation of surface waves (SWs) characterized by a phase velocity (ν = ω /β) lower than the free space velocity (c = ω /k 0 ). Thus, the phase constant of the SWs (β) is larger than the free space wavenumber (k 0 ): ν < c → β >k 0 .…”

“…However, one of the most interesting application of MTS-based structures is the realization of low-profile lightweight antennas for space applications [13][14][15][16][17][18]. By modulating the characteristic surface impedance, a transition from a cylindrical SW excited form the center to a leaky-wave (LW) is obtained using a MTS-based structure.…”

“…By modulating the characteristic surface impedance, a transition from a cylindrical SW excited form the center to a leaky-wave (LW) is obtained using a MTS-based structure. By means of the modulation of the scalar or tensor impedance characteristics of the isotropic or anisotropic surfaces, beam pointing, shape and radiated field polarization can be tailored for different applications [13][14][15][16][17][18]. Most of the configurations found in the literature work in single-mode operation.…”

Theoretical design considerations for dual circularly-polarized broadside beam metasurface antenna

“…Modulated Metasurface Antennas (MoMetAs) are presented as innovative thin metamaterial solutions in the framework of satellite applications [1][2][3][4][5]. This technology is suitable to substitute conventional bulky systems not only due to its capacity to obtain complex pattern shapes, but also due to its low cost, as MoMetAs can be realized by printing small metallic patches on top of a grounded slab.…”

“…This is the case for circularly polarized broadside radiators [2][3] or antennas with isoflux shaped radiation patterns [4][5]. Isotropic (scalar) or anisotropic (tensor) surface impedance concepts were introduced to characterize boundary conditions relating the tangential components of the average electric and magnetic field components.…”