Design guidelines for the SPICE parameters of waveform-selective metasurfaces varying with the incident pulse width at a constant oscillation frequency

TL;DR

This paper provides design guidelines for circuit-based waveform-selective metasurfaces, focusing on how diode SPICE parameters influence electromagnetic response and performance at specific frequencies and power levels.

Contribution

It reveals the relationship between diode SPICE parameters and metasurface response, offering practical guidelines for optimizing diode selection and circuit design.

Findings

Reducing diode parasitic capacitance improves high-frequency performance.

Operating power level is linked to diode saturation current and breakdown voltage.

Adding an internal resistor broadens the operational power range.

Abstract

In this study, we numerically demonstrate how the response of recently reported circuit-based metasurfaces is characterized by their circuit parameters. These metasurfaces, which include a set of four diodes as a full wave rectifier, are capable of sensing different waves even at the same frequency in response to the incident waveform, or more specifically the pulse width. This study reveals the relationship between the electromagnetic response of such waveform-selective metasurfaces and the SPICE parameters of the diodes used. First, we show that reducing a parasitic capacitive component of the diodes is important for realization of waveform-selective metasurfaces in a higher frequency regime. Second, we report that the operating power level is closely related to the saturation current and the breakdown voltage of the diodes. Moreover, the operating power range is found to be broadened by introducing an additional resistor into the inside of the diode bridge. Our study is expected to provide design guidelines for circuit-based waveform-selective metasurfaces to select/fabricate optimal diodes and enhance the waveform-selective performance at the target frequency and power level.