An imaging system with frequency-phase scanning based on a waveguide-slotted array of the leaky wave

 

V. A. Kaloshin, E. V. Frolova

Kotelnikov Institute of Radioengineering and Electronics of Russian Academy of Sciences, Mokhovaya str. 11-7, Moscow 125009, Russia

 

The paper is received on February 19, 2018

 

Abstract. In this paper the results of synthesis and analysis of a two-dimensional array of  leaky wave waveguides filled with a dielectric, focused in the Fresnel zone are presented. As radiators, pairwise longitudinal rectangular slots in wide walls of waveguides, shifted by half the wavelength in the waveguide at the central frequency of the band are selected. The problem of determining the position of the slots for focusing the field at a finite distance from the plane of the lattice is solved. Using the finite element method, numerical simulation of the array radiation in the frequency-phase scanning mode is performed. The shape of the focal surface in frequency and phase scanning and the directional characteristics of focused beams in the Fresnel zone are investigated. A comparison with the previously studied array of hollow waveguides is made, the possibility of suppressing the side interference maxima is shown.

Key words: waveguide-slotted array, waveguide filled with a dielectric, focusing in the Fresnel zone, frequency-phase scanning.

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For citation:
V. A. Kaloshin, E. V. Frolova. An imaging system with frequency-phase scanning based on a waveguide-slotted array of the leaky wave. Zhurnal Radioelektroniki - Journal of Radio Electronics. 2018. No. 3. Available at http://jre.cplire.ru/jre/mar18/3/text.pdf
DOI  10.30898/1684-1719.2018.3.8