Signal detection in a
radiating nonlinear electromagnetic crystal
S. E.
Bankov
Kotel'nikov
Institute of Radio-engineering and Electronics of RAS, Moscow
Received November 9, 2011
Abstract. Interaction of
electromagnetic waves in infinite radiating electromagnetic crystal which elements
contain nonlinear resistive-capacitive two-ports is considered. The structure
is excited by a free space plane wave at dominant frequency. Boundary problem
for fields inside electromagnetic crystal is simultaneously solved with a
nonlinear problem for currents and voltages at nonlinear two-ports. Radiating
elements are described approximately without consideration of their mutual
coupling. Results of numerical and analytical study of detection of signal
produced by free space plane wave are presented. The structure is optimized by
a criterion of transformation loss minimum. It is shown that electromagnetic
crystal in detection regime may have high directivity not connected with its
geometrical dimensions.
Keywords:
electromagnetic crystal, non-linear antenna array, signal
detection.