Abstract
By employing varactor diodes in a metasurface, the surface impedance can be changed by a bias voltage, as the resonant frequency altered. In order to convert the frequency of a reflected wave, 360° reflection phase variation is required. This study presents the related theory and demonstrates the frequency conversion through the experimental results. We achieved the reflection frequency conversion which is increased by 50 kHz more than the incident wave of 2.65 GHz, and its SFDR and conversion loss are 7.38 dBc and 5.62 dB, respectively. The proposed metasurface can contribute an efficient improvement in anti-RADAR system fields.
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