"JOURNAL OF RADIO ELECTRONICS" (Zhurnal Radioelektroniki)  ISSN 1684-1719, N 1, 2017

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Study of the frequency scanning for a slotted waveguide antenna array with a constant phase shift between the waveguides

 

V. I. Kalinichev1, A. A. Babaskin2

1 Kotel'nikov Institute of Radio Engineering and Electronics of Russian Academy of Sciences

2 RF Mtech, Seul, South Korea

                                            

The paper is received on January 19, 2016

 

Abstract. Numerical study of the dispersion properties of a 2-D periodic leaky wave antenna composed of the array of one-dimensional slotted waveguide antennas with linear phase shift between them is presented. Calculations were performed using the multimode setup for the eigen mode problem. The study revealed branches and stop bands in the dispersion diagram caused by the mutual coupling and phase shift between the waveguides in the array. The directions of radiation of the leaky Floquet space harmonic and the scanning sector in the frequency range for the given phase shift are determined. The numerical analysis of a large finite array composed of waveguides of finite length is carried out. The angles of radiation and the scanning sector of the finite array fed from all its inputs were computed in the given frequency range. They agree very well with the corresponding leakage directions and the scanning sector of the leaky space harmonic in the infinite array. For the given parameters the scanning sector is 30° in elevation and 40° in azimuth in the frequency range 8-11 GHz. The active reflection coefficients at the waveguide inputs do not exceed -20 dB in most of the frequency range. It is also shown that with increasing the phase shift between waveguides an additional beam corresponding to a different spatial harmonic may appear in the radiation pattern along with the main beam.

Key words. Leaky wave antenna, 2-D periodic antenna array, slotted-waveguide antenna, phase shift, scanning sector.

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16. Kalinichev V., Babaskin A.  Analysis of a 2-D periodic waveguide slot array with frequency-phase beam scanning. Zhurnal Radioelektroniki - Journal of Radio Electronics, 2016, No. 2. Available at http://jre.cplire.ru/jre/feb16/3/text.pdf. (In Russian)

Kalinichev V., Babaskin A.  Frequency scanning of a leaky wave antenna on a rectangular dielectric-filled waveguide. Zhurnal Radioelektroniki - Journal of Radio Electronics, 2016, No. 8. Available at http://jre.cplire.ru/jre/aug16/2/text.pdf. (In Russian)

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Reference to this paper:

Study of the frequency scanning for a slotted waveguide antenna array with a constant phase shift between the waveguides. V. I. Kalinichev, A. A. Babaskin. Zhurnal Radioelektroniki - Journal of Radio Electronics, 2017, No. 1. Available at http://jre.cplire.ru/jre/jan17/7/text.pdf. (In Russian)