Design Method for Broadband Invisible Cloaks by Using Straight and Meander Transmission-Lines

A design method for transmission-type broadband invisible cloaks is presented. An invisible cloak for hiding a much larger rhombus area than the wavelength is designed by using straight and meander transmission-lines and those line lengths are calculated from theoretical formulas. Circuit simulations are carried out and the broadband operations of the designed invisible cloak are demonstrated from the calculated results of the complex voltage distributions.