Radiation characteristics of
a linear slotted-waveguide array with a wide frequency scan
V. I. Kalinichev, V. A. Kaloshin
Kotelnikov
Institute of Radioengineering and Electronics of Russian Academy of Sciences, Mokhovaya, 11-7, Moscow 125009, Russia
The
paper is received on January 30, 2019
Abstract. A linear slotted
waveguide antenna array with a wide frequency scanning sector and its
electromagnetic model were proposed in [1]. The antenna array is made of a
rectangular metal waveguide filled with a dielectric and loaded by periodically
located pairs of transverse slots in a wide wall. A wide scanning sector is
achieved due to the continuous frequency transition from the fundamental (zero)
harmonic radiation mode to the -1 harmonic radiation mode of the array spatial
spectrum. As a result of the numerical simulations the possibility of beam
scanning in the 180-deg angular sector was shown and the frequency dependences
of the normalized radiation patterns, directivity and the scattering matrix
parameters were computed. In this paper, we study such radiation
characteristics as the array gain and the aperture efficiency. It is shown that
due to the non-uniformity of the leakage constant in the operating frequency
band and the high reflection level in the frequency transition region from one radiation
mode to the other the antenna array is characterized by strong non-uniformity
of the gain and the aperture efficiency versus frequency in most of the
operating range.
Keywords: slotted waveguide antenna
array, frequency scanning, reflection coefficient, gain, aperture efficiency.
1.
Kaloshin V. A., Kalinichev V. I. A linear slotted waveguide antenna
array with 180-degree frequency scanning sector. Journal
of Communications Technology and Electronics.
2019. Vol .64. No
6. (to be published)
2. Bankov
S. Antennie reshetki s posledovatelnim pitaniem. Moscow, Fizmatlit
Publ., 2013. (In Russian)
3. Kalinichev
V. I., Babaskin A. A. A method of calculating the leaky-wave propagation constant in slotted waveguides. Journal of Radio Electronics, 2015, No. 7.
http://jre.cplire.ru/jre/jul15/2/text.pdf (In Russian)
4. Xu F., Patrovsky A., Wu K. Fast Simulation of Periodic Guided-Wave
Structures Based on Commercial Software. Microwave Opt. Technol. Lett., 2007,
Vol. 49, No. 9, pp. 2180-2182.
For citation:
V. I. Kalinichev,
V. A. Kaloshin. Radiation characteristics of a linear slotted-waveguide array
with a wide frequency scan. Zhurnal
Radioelektroniki - Journal of Radio Electronics. 2019. No. 2. Available at
http://jre.cplire.ru/jre/feb19/7/text.pdf
DOI 10.30898/1684-1719.2019.2.7