Abstract
High directive antennas are fundamental elements for microwave communication and information processing. Here, inspired by the method of transformation optics, we propose and demonstrate a transformation medium to control the transmission path of a point source, resulting in the unidirectional behavior of electromagnetic waves (directional emitter) without any reflectors. The network of inductor-capacitor transmission lines is designed to experimentally realize the transformation medium. Furthermore, the designed device can work in a broadband frequency range. The unidirectional-manner-based device demonstrated in this work will be an important step forward in developing a new type of directive antennas.
Highlights
The MIT Faculty has made this article openly available
There are three kinds of high-directive antennas, namely reflectors[4,5], array of radiating elements[6] or cavities[7,8,9] and lens[10,11,12,13], which can be realized by using reflectors, a set of individual antennas, Fabry–Perot resonators, and gradient-refractive-index (GRIN) metamaterials
All of them are commonly characterized by high-directivity and broadband response in theory, the corresponding materials always require extreme values, and most of them are dependent on the reflectors
Summary
The MIT Faculty has made this article openly available. Please share how this access benefits you. Inspired by the method of transformation optics, we propose and demonstrate a transformation medium to control the transmission path of a point source, resulting in the unidirectional behavior of electromagnetic waves (directional emitter) without any reflectors.
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
