ABSTRACT
This chapter describes potential applications of magnetoinductive (MI) waves. It discusses waveguides and waveguide devices, rotational resonance and subwavelength imaging. Magnetic metamaterials have potential for magnetic resonance imaging (MRI). An MI wave propagating along the ring has a resonance if the circumference of the ring is equal to an integral multiple of the wavelength. The chapter examines subwavelength imaging with megahertz magnetic metamaterials, which, similar to the rotational resonance, have potential in MRI and suggests different approaches to the imaging that have been developed and several theoretical models. The basic idea of imaging with resonant magnetic elements can be understood from a very simple configuration. Amplification of the signals at an early stage, at the detection system, could then improve the performance of MRI machines. Propagation of MI waves is usually restricted to narrow frequency bands, whose width is determined by the coupling strength between the elements of the arrays.
