POWER SUPPLY OF RING ANTENNA USING DIRECTIONAL COUPLERS

Authors

  • L. Ya. Ilnitskyi National Aviation University, Kyiv, Ukraine, Ukraine
  • O. A. Shcherbyna National Aviation University, Kyiv, Ukraine, Ukraine
  • M. Yu. Zaliskyi National Aviation University, Kyiv, Ukraine, Ukraine
  • I. I. Mykhalchuk Taras Shevchenko National University, Kyiv, Ukraine , Ukraine
  • O. V. Kozhokhina National Aviation University, Kyiv, Ukraine , Ukraine

DOI:

https://doi.org/10.15588/1607-3274-2023-3-1

Keywords:

microstrip ring antenna, directional microstrip coupler, supply lines, ellipticity coefficient, main coordinate system, individual coordinate system

Abstract

Context. The circular polarization of radio waves is used in various electronic systems. This includes, for example, space communications stations, some radio relay communication systems, radar stations, data transmission systems and others. The characteristics of radio wave propagation are studied by using electromagnetic waves separated by circular orthogonal polarization in radiomonitoring and radiocontrol systems. Compared to other antenna types, circularly polarized antennas, such as rings, have superior design simplicity and excellent electrodynamics properties.

Objective. The objective of this study is to analyse the characteristics and application of directional microstrip couplers for supplying power to ring antennas.

Method. To better the performance of microstrip ring antennas, the reasons for their limited operating frequency range are analysed. These causes include the frequency-dependent parameters of the coupler, errors in calculating the directional coupler circuit, and radiation from asymmetric strip lines. To understand how supply lines, affect antenna characteristics, correlations between radiation fields determined in both its coordinate system and that of the primary axis are taken into account.

Results. An analysis of the dependence graphs of the main characteristics of ring microstrip antennas with intricate power supply circuits for directional couplers and comparison with similar characteristics for simple circuits revealed that the shape of the radiation pattern in the higher radiation hemisphere became symmetrical about the axis, especially when symmetrically supplying the ring with branch-line couplers. The frequency band has also widened, at which there was an acceptable degree of deviation in the ellipticity coefficient from unity.

Conclusions. The simulation results of microstrip ring antennas with power lines connected to directional couplers of different types showed that supplying the ring antenna with electricity via the directional coupler ensures circular polarization for the emitted electromagnetic waves. Additionally, the range of operating frequencies where there is only a small discrepancy in ellipticity coefficient remains at an acceptable level of –3 dB is quite broad. By utilizing directional branch-line couplers to power a ring antenna, it is possible to simultaneously emit both right and left circularly polarized waves with the same antenna.

Author Biographies

L. Ya. Ilnitskyi, National Aviation University, Kyiv, Ukraine

Dr. Sc., Honored Worker of Science and Technology of Ukrainе

O. A. Shcherbyna, National Aviation University, Kyiv, Ukraine

Dr. Sc., Professor of the Department of Electronics, Robotics and Technology of Monitoring and Internet of Things

M. Yu. Zaliskyi, National Aviation University, Kyiv, Ukraine

Dr. Sc., Professor of the Department of Telecommunication and Radio Electronic Systems

I. I. Mykhalchuk, Taras Shevchenko National University, Kyiv, Ukraine

PhD, Assistant of the Department of Cyber Security and Information Protection

O. V. Kozhokhina, National Aviation University, Kyiv, Ukraine

PhD, Associate Professor of the Department of Avionics

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Published

2023-09-28

How to Cite

Ilnitskyi, L. Y., Shcherbyna, O. A., Zaliskyi, M. Y., Mykhalchuk, I. I., & Kozhokhina, O. V. (2023). POWER SUPPLY OF RING ANTENNA USING DIRECTIONAL COUPLERS . Radio Electronics, Computer Science, Control, (3), 6. https://doi.org/10.15588/1607-3274-2023-3-1

Issue

No. 3 (2023): Radio Electronics, Computer Science, Control

Section

Radio electronics and telecommunications

License

Copyright (c) 2023 Л. Я. Ільницький, О. А. Щербина, М. Ю. Заліський, I. I. Mykhalchuk, О. В. Кожохіна

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