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This paper presents a novel two-dimensional (2-D) partial Maxwell fish-eye (PMFE) lens with the capability of wide-angle beam scanning inspired by the Gutman lens and Eaton lens, which is obtained by cutting a part from the 2-D Maxwell fish-eye (MFE) lens along a straight line. In terms of the refractive index profile, the MFE lens is similar to the Gutman lens near the center and the Eaton lens near the edge, respectively. We demonstrate the potential of the PMFE lens in wide-angle beam scanning based on its Gutman-like focusing and Eaton-like rotating characteristics corresponding to different feed points. As an example, a fully metallic PMFE lens antenna in the Ka-band composed of a bed of nails and a series of linearly arranged waveguide feeders is designed and experimentally verified. The measured results reveal wide-angle scanning ranges, especially about ±90° at 36 GHz, low reflections and low mutual couplings. The frequency scanning due to the dispersion of the lens is also discussed.

The simulation and measurement results verify the independent antenna radiation performance and the function of the fully polarized antenna. From 2.33 GHz to 2.45 GHz (4.1% impedance bandwidth), the S 11 parameters of all antennas are lower than -10 dB. The S 21 parameters tested among antennas are lower than -23.0 dB in the 2.2-2.6 GHz frequency band. The X and Y antenna cover the 0°<θ<60°airspace and the H and V antenna cover the 60°<θ<90°airspace. The independent antenna polarization has been accurately present, and the orthogonality of the polarization has been verified. The X and Y antenna cover orthogonal polarized radiation in 93.4% of hemisphere and the H and V antenna cover 87.8%. The not orthogonal area is far away from their main research area. Experiments for the unknown polarization waves analysis and the antenna pattern reconstruction are implemented to demonstrate the polarization coverage and application potential of the fully polarized antenna.

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