ESTIMATING ANTENNA COUPLING FACTOR FOR PROBLEM OF TOPSIDE IONOSPHERE SOUNDING FROM SPACE BY CHIRP SIGNALS

Journal Title: Solar-Terrestrial Physics - Year 2019, Vol 5, Issue 4

Abstract

When developing the first topside ionosphere sounding stations, the issue was debated concerning the improvement of the electromagnetic compatibility of such devices through the use of chirp signals. One of the main problems of using chirp signals was the impossibility of ensuring simultaneous operation of receiver and transmitter. The article presents the results of the use of receiving and transmitting dipole antennas with a common center for sounding the ionosphere by a chirp signal. Conclusions are drawn about the possibility of using such facilities for sounding the external ionosphere with the configuration with hardware separation of polarizations and in the terrestrial version with orthogonal placing of the receiving and transmitting antennas. During tests conducted on a specially designed antenna stand, we have found that the coupling coefficient of the transmitting and receiving antennas at mutual angles of 45° is no more than –10 dB, and the difference between the coupling coefficients of transmitting and receiving antennas with mutual angles of 45° and 90° is ~15 dB.

Authors and Affiliations

Podlesnyi A. V. , Naumenko A. V. , Cedrik M. V.

Keywords

Related Articles

DEFINITION OF THE ALFVÉN MODE IN INHOMOGENEOUS MAGNETIC FIELD

The article is methodological and defines the concept of the linear Alfvén mode. There are two definitions — electrodynamic and hydrodynamic. In the former, the Alfvén mode is considered a wave with a potential transvers...

VARIATIONS OF IONOSPHERIC PARAMETERS OVER ALMATY (KAZAKHSTAN) IN 1999–2013

The paper presents the results of a study of the behavior of ionospheric parameters of the total electron content, I(t), and electron density in the maximum F2 layer, Nm, over Almaty (Kazakhstan) [43.25° N; 76.92° E] in...

Solar activity and Earth seismicity

Using the results of continuous long-term observations over 50 years (including solar cycles 20–24), we study the relationship between Earth’s seismicity and solar activity. An increase in the number of strong earthquake...

Long-period geomagnetic pulsations as an element of the space weather influence on technologocal systems

We analyze variations in geomagnetically induced currents (GIC) and pulsations of the geomagnetic field latitudinal By component in the frequency range 1–20 mHz. The analysis is based on the data from GIC registration at...

SPACE WEATHER IMPACT ON GROUND-BASED TECHNOLOGICAL SYSTEMS

This review, offered for the first time in the Russian scientific literature, is devoted to various aspects of the problem of the space weather impact on ground-based technological systems. Particular attention is paid t...

Download PDF file
  • EP ID EP702106
  • DOI 10.12737/stp-54201914
  • Views 113
  • Downloads 0

How To Cite

Podlesnyi A. V. , Naumenko A. V. , Cedrik M. V. (2019). ESTIMATING ANTENNA COUPLING FACTOR FOR PROBLEM OF TOPSIDE IONOSPHERE SOUNDING FROM SPACE BY CHIRP SIGNALS. Solar-Terrestrial Physics, 5(4), -. https://europub.co.uk/articles/-A-702106