Design of a Broadband Carpet Cloak for Hiding Larger Objects than the Wavelength by Using One-Dimensional Meander Microstrip-Line Structures

Four types of one-dimensional (1-D) meander microstrip-line structures are proposed in order to realize 1-D distributed transmission-line models for the design of carpet cloaks that can hide larger objects than the wavelength. The line length of the proposed structures is determined based on the design theory of the model and a carpet cloak for hiding periodically arranged large triangle areas on a flat surface is designed by using the proposed structures. Full-wave simulations are performed, and the broadband operations and the validity of the design are demonstrated from the calculated results.