Summary
International Symposium on Antennas and Propagation
2009
Session Number:3F1
Session:
Number:3F1-5
Experimental Investigation of Conversion Loss of Phase Conjugate FSS
Achmad Munir, Vincent Fusco,
pp.1147-1150
Publication Date:2009/10/21
Online ISSN:2188-5079
Summary:
Recently, the investigation of scattering properties of a two-dimensional double periodic array of wires that loaded with nonlinear lumped elements was reported [1]. The numerical investigation has demonstrated the evidence of parametric amplification of specular wave and the production of phase conjugated, retro directed wave. The ability to produce such signals as mentioned latter is useful in a variety of applications at microwave and millimeter wave frequencies, such as subwavelength imaging [2] and self-tracking wireless communications [3]-[4]. As is well-known the straightforward extension of optical phase conjugation techniques into the microwave frequency region is still a problem. This is due to the small nonlinear susceptibility of naturally occurring nonlinear materials at microwave frequencies. Hence, the sampling method of incoming wavefront using an antenna array has been proposed [5]. This array together with active microwave circuitry is applied to produce mixing of the wavefront samples with a local oscillator operated at the second harmonic of the signal to be phase-conjugated. In this paper, a different approach wherein we assess the means for experimental characterization of a 2D nonlinear electromagnetic medium with phase conjugation properties is adopted. By using parallel plate waveguide (PPW) characterization techniques, a conversion loss of a doubly periodic diode loaded frequency selective surface phase conjugating structures is experimentally investigated.