Abstract
In this letter, a broadband active solar cell meta-surface (SCMS) antenna powered by solar energy is proposed. This active antenna is composed of a programmable frequency source circuit and a SCMS antenna. The SCMS antenna is constructed by a spade shaped monopole and two SCMSs. The two SCMSs are located above and below the spade shaped monopole. We analyzed the working mechanism of SCMS using characteristic mode analysis (CMA) method. It shows the SCMS improves the voltage standing wave ratio (VSWR) and gain of the original antenna, and raise the coverage ratio of the solar cell. The VSWR of the SCMS antenna is less than 1.5 at 2.14-3.68 GHz, less than 2 at 2.08-4.1 GHz, and the gain of the antenna increases 1.74 dB on average in the frequency band of 2.6-4.1 GHz. The solar cell coverage ratio is 75.5%, with 100% insolation. This design provides an idea to achieve an active antenna powered by solar energy, which can be used for green wireless communication.
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