"JOURNAL OF RADIO ELECTRONICS" (Zhurnal Radioelektroniki ISSN 1684-1719, N 2, 2019

contents of issue      DOI  10.30898/1684-1719.2019.2.8     full text in Russian (pdf)  

Transceiver antenna of decimetric wavelength range

M. A. Laptev

Special Design Bureau, Kotelnikov Institute of Radioengineering and Electronics of Russian Academy of sciences,

sqare acad. Vvedenskogo, 4, Fryazino Moscow region 141190, Russia

 

The paper is received on January 30, 2019

 

Abstract. In this article, a method for broadband matching of a shortened symmetrical dipole antenna with a 50-ohm feeder line is presented. The method is based on the use of a two-link Chebyshev bandpass filter scheme for matching the reactive component of the antenna input impedance. With this type of matching, the capacitance of the series circuit of the bandpass filter is formed by the input capacity of the antenna. At the same time, the antenna radiation resistance is the load resistance of the filter of the shortened dipole. Results of calculations of the matching device of the reduced antenna model are presented. Calculations are performed and graphs of the dependences of the efficiency and the operating frequency band of the antenna on the values of the shunt resistors are presented. The results of full-scale measurements of the S11 parameters of the lessened model and the full-size antenna are presented. It is shown that the developed matching method allows to extend the antenna bandwidth up to ≈35% in terms of the reflected signal level minus 10 dB, which corresponds to the VSWR ≈ 2. At the same time, the antenna dimensions are reduced by 2.5 times in comparison with the half-wave dipole. The developed matching method can be used to match symmetrical dipole antennas, which are used in conditions of limited installation space and to reduce mass-dimensional characteristics.

Keywords: symmetrical dipole antenna, matching device.

References

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For citation:

M. A. Laptev. Transceiver antenna of decimetric wavelength range. Zhurnal Radioelektroniki - Journal of Radio Electronics. 2019. No. 2. Available at http://jre.cplire.ru/jre/feb19/8/text.pdf

DOI  10.30898/1684-1719.2019.2.8