https://ieeexplore.ieee.org/document/8676352
In this paper, a novel 3-dimensional (3-D) printed circularly polarized (CP) modified Fresnel lens antenna operating at 300GHz is introduced. By virtue of the superior geometric flexibility of the 3-D printing technique, a modified Fresnel lens consisting of subwavelength discrete dielectric posts in the odd-numbered Fresnel zones is proposed. It is further demonstrated that by integrating dielectric anisotropic metamaterial, the modified Fresnel lens can realize CP radiation fed by a simple linearly polarized (LP) open-ended waveguide (OEWG). The 3-D printing approach is also investigated to push the performance envelops of the 3-D printer for realization of the THz CP lens. The measured results show that the axial ratios (AR) of the fabricated antenna prototype are smaller than 3dB from 265 to 320GHz. Moreover, the modified Fresnel lens has a maximum gain of 27.4dBic, which is 0.9dB lager than that of the conventional Fresnel zone plane antenna (FZPA). These validate the concept, the design, and the fabricated prototype.
No comments:
Post a Comment