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In this paper, a planar metasurface operating in microwave region to generate Bessel beam carrying orbital angular momentum (OAM) is proposed. The beam generator is realized by utilizing the abrupt phase changes at the interface of the metasurface, instead of the gradual phase differences in the optical lenses. The proposed planar metasurfaces are designed and simulated respectively, and the results...
In this paper, a high-efficient metasurface to realize the refraction controlling of electromagnetic wave is designed in the microwave region. Based on the Pancharatnam-Berry (P-B) Phase Principle and Generalized Laws of Refraction, a novel artificial electromagnetic unit cell has been raised to complete the function of efficiently transmission of wave refraction, which forms the desired metasurface...
In this work, a novel phase shifter using five unit cells of the varactor-loaded composite right/left-handed (CRLH) transmission line (TL) is presented, achieving a continuously tunable phase-shift of approximate 360° at the exact 2.4 GHz. The CRLH-TL unit cell includes 3 electrically tunable varators (two series ones and a shunt one) which allow phase shift change at 2.4 GHz, and a biasing network...
In this paper, anomalous reflection for circularly polarized (CP) waves is proposed to achieve, where the reflected waves possess orbital angular momentum (OAM) along their direction of propagation based on the Pancharatnam-Berry (geometrical) phase. Based on the phase gradient metasurface (PGM), we firstly presented a polarization-converting metasurface reflector for circularly polarized waves. On...
In this paper, the receivers and transmitters for multi-system transceivers are modeled by spectrum allocation to predict mutual interference. The mirror interference, resonance interference, intermediate frequency interference and the local oscillator interferes have been taken into consideration as interference parameters for prediction by computer codes. Potential interference from the systems...
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