The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
The results of an experimental study of patterns of the three-band feed for a small VLBI2010 compatible radio telescope reflector antenna are presented. Differences of the behavior of experimental three-band feed patterns and requirements specification for feed-prototype [1] are brought to light. A new engineering solution of the three-band feed unit has been suggested.
In 2013–2014, a new software and hardware controlling complex was developed and installed on the UTR-2 radio telescope. Controlling complex is designed for planning observations of discrete cosmic radio sources and areas of the celestial sphere, for programming control of UTR-2 pattern position with UTC time scale synchronization, for monitoring of control codes execution, as well as for control of...
Radio astronomy deals with the weakest signals received by a radio electronic device, and, as a result, it is very complicated problem to maintain appropriate SNR while transferring signal from the antenna output to receiver's input. In this paper, a system for delivering the radio astronomical signals from dipole terminals to ADC input of Giant Ukrainian Radio Telescope (GURT) is described. Examples...
Advantages of the diamond dipole antenna as an active antenna are presented. Such an antenna is like an inverted bow-tie antenna, but the former has some advantages over the ordinary bow-tie antenna. It is shown that the diamond dipole antenna may be an effective element of a new antenna array for low-frequency radio astronomy as well as a communication antenna.
The purpose of the work is to develop testing and calibration technique of large phased antenna arrays using reference noise generator as a standard signal source. This technique is developed for calibration of the phased antenna array of the unique decameter wave radio telescope UTR-2, but they could be easy adapted for similar large arrays with analog and digital beam forming.
The low frequency radio astronomy (decameter-meter range, frequencies of 10–300 MHz) currently demonstrates rapid progress all over the world. New generations of large antennas - LOFAR, LWA, MWA and others - have been created in many countries. At the same time Ukrainian radio astronomical systems UTR-2 and URAN still remain the largest and most informative ones at the lowest frequency range available...
NenuFAR is both a giant extension of the LOFAR and a large standalone instrument in the low-frequency range (10–85 MHz). It was designed in Nançay with national and international collaboration. Antenna radiators were modeled on the LWA antenna design whereas preamplifiers were designed in France. Antennas will be distributed in 96 mini-arrays of 19 dual-polarized elements, densely covering a disk...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.