Design of a Beam Steering Microwave Lens Based on Transformation Optics

As a commonly used receiving antenna, waveguide has the main disadvantages of small receiving area and low energy convergence. In this paper, a novel microwave lens based on the concept of transformation for beam steering is studied. Equipped with such a lens, the waveguide can have a larger receiving area and better energy convergence. The electric-field distributions of the microwave lens are simulated by three-dimensional simulation software HFSS. The simulations of incident waves at different angles further proves the convergence performance of the lens. The implementation of the lens illustrate the practicality of transformation optics to achieve a new class of microwave devices and it possesses potential applications in reception systems.

I. Introduction

Since the invention of cloaking cloak in 2006[1], transformation optics has been widely studied due to its unique capabilities. By utilizing coordinate transformation, transformation optics offers a technique to tame the electromagnetic field into desired spatial patterns, providing a number of applications in engineering and applied sciences. In the field of antennas and lenses, many microwave devices such as directional antennas, focusing devices, and multi-beam antennas have been proposed [2]–[4].