Terahertz Waveform‐Selective Antenna Using a Patch Structure Loaded with Nonlinear Circuits

In this article, a waveform‐selective antenna that integrates the functions of waveform selectivity, electromagnetic (EM) shielding, and EM wave radiation has been proposed. By integrating different nonlinear circuits and selecting appropriate component values, the antenna can achieve high reflection of either a pulse wave (PW) or a continuous wave (CW) at the same frequency, while allowing the other waveform to transmit with minimal interference. When exposed to pulse waves (PWs) of varying pulse widths, the antenna can adaptively process them by adjusting the values of its capacitive or inductive components. The proposed design introduces an additional degree of freedom for manipulating EM waves in the terahertz (THz) band, that is, the ability to select the time‐domain waveform. Combining functional integration with a compact size, the waveform‐selective antenna holds significant potential for a range of applications, including detection, EM shielding, and THz communications.