A candidate active antenna design for a low frequency radio telescope array

2007 ◽  
Author(s):  
Nagini Paravastu ◽  
Brian Hicks ◽  
Paul Ray ◽  
William Erickson
Keyword(s):  
Radio Telescope ◽  
Low Frequency ◽  
Antenna Design ◽  
Active Antenna ◽  
Telescope Array

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

2017 ◽  
Vol 65 (9) ◽  
pp. 4636-4644 ◽  
Author(s):  
Peter L. Tokarsky ◽  
Alexander A. Konovalenko ◽  
Serge N. Yerin
Keyword(s):  
Antenna Array ◽  
Radio Telescope ◽  
Low Frequency ◽  
Array Element ◽  
Active Antenna

Design and Evaluation of an Active Antenna for a 29–47 MHz Radio Telescope Array

2007 ◽  
Vol 55 (3) ◽  
pp. 826-831 ◽  
Author(s):  
Steven W. Ellingson ◽  
John H. Simonetti ◽  
Cameron D. Patterson
Keyword(s):  
Radio Telescope ◽  
Active Antenna ◽  
Telescope Array

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

2019 ◽  
Vol 67 (12) ◽  
pp. 7304-7311 ◽  
Author(s):  
Peter L. Tokarsky ◽  
Alexander A. Konovalenko ◽  
Serge N. Yerin ◽  
Igor N. Bubnov
Keyword(s):  
Theoretical Model ◽  
Radio Telescope ◽  
Low Frequency ◽  
Active Antenna

Thirty-Element Active Antenna Array as a Prototype of a Huge Low-Frequency Radio Telescope

2003 ◽  
Vol 16 (3) ◽  
pp. 149-164 ◽  
Author(s):  
Alexander Alexandrovich Konovalenko ◽  
Igor Savelievich Falkovich ◽  
Nikolay Nikolaevich Kalinichenko ◽  
Alexander Alexandrovich Gridin ◽  
Igor Nikolaevich Bubnov ◽  
...  
Keyword(s):  
Antenna Array ◽  
Radio Telescope ◽  
Low Frequency ◽  
Active Antenna

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

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.

An Active Antenna Subarray for the Low-Frequency Radio Telescope GURT—Part II: Numerical Analysis and Experiment

2019 ◽  
Vol 67 (12) ◽  
pp. 7312-7319 ◽  
Author(s):  
Peter L. Tokarsky ◽  
Alexander A. Konovalenko ◽  
Serge N. Yerin ◽  
Igor N. Bubnov
Keyword(s):  
Numerical Analysis ◽  
Radio Telescope ◽  
Low Frequency ◽  
Active Antenna

scholarly journals First Radio Astronomy Examination of the Low-Frequency Broadband Active Antenna Subarray

2014 ◽  
Vol 2014 ◽  
pp. 1-5 ◽  
Author(s):  
A. A. Stanislavsky ◽  
I. N. Bubnov ◽  
A. A. Konovalenko ◽  
A. A. Gridin ◽  
V. V. Shevchenko ◽  
...  
Keyword(s):  
Remote Control ◽  
Antenna Array ◽  
Radio Telescope ◽  
Personal Computer ◽  
Radio Astronomy ◽  
Low Frequency ◽  
Delay Lines ◽  
Online Interaction ◽  
Active Antenna ◽  
Parallel Data

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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