Loss compensation of a passive metamaterial lens using an injection-locked oscillator

A media with negative refractive index (NRI) can be utilized to focus a point source from one side of NRI material to another side. However, one of the main obstacles to form the image is the material loss. It would smear the finer details of the image. In this paper, a method is presented to compensate the losses by embedding an injection-locked oscillator near the focus region of the NRI material. With the use of injection locking technique, the oscillator is operated at the same frequency of the input point source but provides with higher power at the focus region. The measured results reveal the loss compensation by using this approach.