"JOURNAL OF RADIO ELECTRONICS" (Zhurnal Radioelektroniki ISSN 1684-1719, N 9, 2017

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Frequency-phase beam scanning of slotted waveguide antenna arrays filled with a dielectric

 

V. I. Kalinichev 1, A. A. Babaskin 2

1 Kotel’nikov Institute of Radio Engineering and Electronics of RAS, Mokhovaya 11-7, Moscow 125009, Russia

2 Bona Venture LLC, Seul, South Korea

 

The paper is received on September 4, 2017

 

Abstract. Two-dimensional periodic scanning leaky wave antenna arrays are studied, which consist of rectangular dielectric-filled waveguides with reflection-cancelling transverse slot pairs. The radiation characteristics of infinite and finite-size arrays are computed in the regime of uniform excitation of all inputs with a linear phase shift. The width of the frequency-phase scanning sector is investigated depending on the dielectric permittivity of the material filling the waveguides. Studies have shown that the considered antenna arrays have a relatively wide single-beam scan sector. In the frequency range 8.75 - 10.75 GHz the elevation scanning capabilities for the arrays with the filling materials ε = 2.25 and ε = 9 are characterized by the angular sectors of 30° and 71°, respectively. The azimuth scanning is determined by the beam tilt by 45° - 59° at the phase shift of 120° (ε = 2.25) and by 44° - 60° at the phase shift of 60° (ε = 9), in the same frequency range. It is also shown that at a given frequency and with a change in the phase shift the beam scans along the surface of an almost circular cone with a constant elevation angle at its vertex measured relative to the waveguide axes. It is obtained that the angles of radiation for the simulated finite-size arrays and the corresponding infinite arrays are practically same.

Keywords. Leaky-wave antennas, slotted waveguide arrays, dielectric-filled waveguides, frequency-phase scanning.

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For citation:

V. I. Kalinichev, A. A. Babaskin. Frequency-phase beam scanning of slotted waveguide antenna arrays filled with a dielectric. Zhurnal Radioelektroniki - Journal of Radio Electronics, 2017, No. 9. Available at http://jre.cplire.ru/jre/sep17/14/text.pdf. (In Russian)