Sensitivity of an Active Antenna Array Element for the Low-Frequency Radio Telescope GURT

We present the 25-element active antenna array and its remote control in the framework of the GURT project, the Ukrainian Radio Telescope of a new age. To implement beamforming, the array is phased with the help of discrete cable delay lines in analog manner. The remote control of the array is carried out through the paired encoder and decoder that can transmit parallel data about antenna codes serially. The microcontroller provides the online interaction between personal computer and beamformers with the help of the encoder-decoder system through wires or wireless. The antenna pattern has been measured by radio astronomy methods.

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30-element active antenna array as a prototype of a huge low-frequency radio telescope

4th International Conference on Antenna Theory and Techniques (Cat. No.03EX699) ◽

10.1109/icatt.2003.1238821 ◽

2004 ◽

Author(s):

I.S. Falkovich ◽

A.A. Konovalenko ◽

N.N. Kalinichenko ◽

A.A. Gridin ◽

A. Lecacheux ◽

...

Keyword(s):

Antenna Array ◽

Radio Telescope ◽

Low Frequency ◽

Active Antenna

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Effect of the ground screen on sensitivity of low-frequency radio telescope array element

2017 XI International Conference on Antenna Theory and Techniques (ICATT) ◽

10.1109/icatt.2017.7972617 ◽

2017 ◽

Cited By ~ 2

Author(s):

Peter L. Tokarsky ◽

Alexander A. Konovalenko ◽

Serge N. Yerin

Keyword(s):

Radio Telescope ◽

Low Frequency ◽

Array Element ◽

Telescope Array

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Optimization of two-element antenna array for low-frequency transient radio telescope

Proceeding of the 2011 IEEE International Conference on Space Science and Communication (IconSpace) ◽

10.1109/iconspace.2011.6015882 ◽

2011 ◽

Cited By ~ 1

Author(s):

Radial Anwar ◽

Mohammad Tariqul Islam ◽

Norbahiah Misran ◽

Geri Gopir ◽

Baharudin Yatim

Keyword(s):

Antenna Array ◽

Radio Telescope ◽

Low Frequency

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SENSITIVITY OF ACTIVE PHASED ANTENNA ARRAY ELEMENT OF GURT RADIO TELESCOPE

Radio physics and radio astronomy ◽

10.15407/rpra21.01.048 ◽

2016 ◽

Vol 21 (1) ◽

pp. 48-57 ◽

Cited By ~ 5

Author(s):

P. L. Tokarsky ◽

◽

A. A. Konovalenko ◽

S. N. Yerin ◽

I. N. Bubnov ◽

...

Keyword(s):

Antenna Array ◽

Radio Telescope ◽

Array Element ◽

Phased Antenna Array

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An Active Antenna Subarray for the Low-Frequency Radio Telescope GURT—Part I: Design and Theoretical Model

IEEE Transactions on Antennas and Propagation ◽

10.1109/tap.2019.2927841 ◽

2019 ◽

Vol 67 (12) ◽

pp. 7304-7311 ◽

Cited By ~ 2

Author(s):

Peter L. Tokarsky ◽

Alexander A. Konovalenko ◽

Serge N. Yerin ◽

Igor N. Bubnov

Keyword(s):

Theoretical Model ◽

Radio Telescope ◽

Low Frequency ◽

Active Antenna

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Impact of Ground Parameters on Performances of an Active Phased Array Element of the Low-Frequency Radio Telescope GURT

Journal of Astronomical Instrumentation ◽

10.1142/s2251171720500154 ◽

2020 ◽

Vol 09 (04) ◽

pp. 2050015

Author(s):

Peter Tokarsky ◽

Alexander Konovalenko ◽

Mykola Kalinichenko ◽

Serge Yerin

Keyword(s):

Radio Telescope ◽

Phased Array ◽

Extreme Values ◽

Low Frequency ◽

Numerical Estimation ◽

Active Antenna ◽

Phased Array Antenna ◽

Absorption Area ◽

Ground Conditions ◽

The Impact

This paper presents the technique of numerical estimation of ground parameters impact on the performances of an active antenna used as an element of a phased array antenna of a modern low-frequency radio telescope. Three ground conditions were considered, two of them wet and dry, which correspond to the extreme values of seasonal deviations of its parameters, as well as its median state (“normal ground”). The results of computer simulation are given for the active antenna of the GURT radio telescope with a ground screen in the form of a square wire grid of [Formula: see text][Formula: see text]m and without it. It is shown that the addition of the ground screen markedly reduces the influence of the ground conditions on some parameters of the antenna, in particular, the dipole impedance and radiation efficiency. At the same time, the ground screen does not protect the most important antenna parameters for radio astronomy, such as sensitivity and absorption area, from the impact of the ground conditions changes. Variations of these parameters for an active antenna with a screen remain approximately the same as without it.

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