Library · IAA RAS

Papers

Features of the Beamforming Using Butler Matrices for BSA LPI Antenna

Transactions of IAA RAS, issue 64, 31–37 (2023)

Keywords: antenna array, radiation pattern, Butler matrix, radio telescope

Abstract

The paper considers the use of 16 × 16 Butler matrices to form the radiation pattern of the phased array antenna of the BSA LPI radio telescope. The frequency dependence of the position of the beams phased array on sky is shown. The influence of the position of the electrical axis of the antenna on the harmonics of the main beam formed on the first floor of the antenna phasing, as well as on the antenna directional diagram as a whole, is considered. The dependence of the amplitude of the harmonics of the main beam of the antenna on the position of the beam relative to the radiation pattern of the first floor of the antenna array phasing is shown. The results of modeling the radiation pattern depending on the frequency and experimental confirmation of model calculations based on observations of sources are presented. Using the example of a daily sky survey, the registration of powerful radio astronomical sources in multiple harmonics of the main beam is shown, the amplitude of harmonics can reach 10 % of the main beam, exceeding the level of the side lobes. Taking into account the peculiarities of the radiation pattern of the phased array antenna array of the BSA LPI radio telescope, formed using 16 × 16 Butler matrices, is critically necessary when searching for pulsars and transients, when identifying weak sources.

Citation

Text

BibTeX

RIS

V. V. Oreshko. Features of the Beamforming Using Butler Matrices for BSA LPI Antenna // Transactions of IAA RAS. — 2023. — Issue 64. — P. 31–37.

@article{oreshko2023,
  abstract = {The paper considers the use of 16 × 16 Butler matrices to form the radiation pattern of the phased array antenna of the BSA LPI radio telescope. The frequency dependence of the position of the beams phased array on sky is shown. The influence of the position of the electrical axis of the antenna on the harmonics of the main beam formed on the first floor of the antenna phasing, as well as on the antenna directional diagram as a whole, is considered. The dependence of the amplitude of the harmonics of the main beam of the antenna on the position of the beam relative to the radiation pattern of the first floor of the antenna array phasing is shown.
The results of modeling the radiation pattern depending on the frequency and experimental confirmation of model calculations based on observations of sources are presented. Using the example of a daily sky survey, the registration of powerful radio astronomical sources in multiple harmonics of the main beam is shown, the amplitude of harmonics can reach 10 % of the main beam, exceeding the level of the side lobes.
Taking into account the peculiarities of the radiation pattern of the phased array antenna array of the BSA LPI radio telescope, formed using 16 × 16 Butler matrices, is critically necessary when searching for pulsars and transients, when identifying weak sources.},
  author = {V.~V. Oreshko},
  doi = {10.32876/ApplAstron.64.31-37},
  issue = {64},
  journal = {Transactions of IAA RAS},
  keyword = {antenna array, radiation pattern, Butler matrix, radio telescope},
  pages = {31--37},
  title = {Features of the Beamforming Using Butler Matrices for BSA LPI Antenna},
  url = {http://iaaras.ru/en/library/paper/2143/},
  year = {2023}
}

TY  - JOUR
TI  - Features of the Beamforming Using Butler Matrices for BSA LPI Antenna
AU  - Oreshko, V. V.
PY  - 2023
T2  - Transactions of IAA RAS
IS  - 64
SP  - 31
AB  - The paper considers the use of 16 × 16 Butler matrices to form the
radiation pattern of the phased array antenna of the BSA LPI radio
telescope. The frequency dependence of the position of the beams
phased array on sky is shown. The influence of the position of the
electrical axis of the antenna on the harmonics of the main beam
formed on the first floor of the antenna phasing, as well as on the
antenna directional diagram as a whole, is considered. The dependence
of the amplitude of the harmonics of the main beam of the antenna on
the position of the beam relative to the radiation pattern of the
first floor of the antenna array phasing is shown.  The results of
modeling the radiation pattern depending on the frequency and
experimental confirmation of model calculations based on observations
of sources are presented. Using the example of a daily sky survey,
the registration of powerful radio astronomical sources in multiple
harmonics of the main beam is shown, the amplitude of harmonics can
reach 10 % of the main beam, exceeding the level of the side lobes.
Taking into account the peculiarities of the radiation pattern of the
phased array antenna array of the BSA LPI radio telescope, formed
using 16 × 16 Butler matrices, is critically necessary when searching
for pulsars and transients, when identifying weak sources.
DO  - 10.32876/ApplAstron.64.31-37
UR  - http://iaaras.ru/en/library/paper/2143/
ER  -