Design of an L-Band Cross-Dipole Phased Array Feed for FAST
Yubing Han,Luoqing Zhong +1 more
TLDR
In this paper, a broadband and low-cost PAF element using cross-dipole antenna at L-band is designed based on the requirement of the FAST, which is fed by two microstrip baluns which have high performance and is easy to manufacture compared to the traditional coaxial balun.Abstract:
The Five-Hundred-Meter Aperture Spherical Telescope (FAST) is a Chinese megascience project that aims to build the largest single dish radio telescope in the world. Given its multiple simultaneous beam formation, phased array feed (PAF) is widely used to extend the field of view and enhance the survey speed of the radio telescope. In this study, a broadband and low cost PAF element using cross-dipole antenna at L-band is designed based on the requirement of the FAST. The antenna is fed by two microstrip baluns which have high performance and is easy to manufacture compared to the traditional coaxial balun. A simple system model is also introduced to evaluate the PAF performance. The measured results of the fabricated element and the simulations of the system performance validate the effectiveness of element design.read more
Citations
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Proceedings ArticleDOI
Development of an L Band Beam Steering Cuboid Antenna Array
TL;DR: A new technique is proposed to steer the antenna beam without any complex feed network and phase shifters, and different cases for achieving beam steering by exciting the antenna element in the cuboid antenna array arrangement are presented.
Proceedings ArticleDOI
Design of L-band 2×16 phased array antenna
TL;DR: An L-band 2×16 phased array antenna with printed dipole and integrated balun using multi-layering technique has been proposed in this article, which satisfies some targeted specification such as having a gain of 20 dB and a steering coverage of 90° at the center frequency 1.28 GHz.
A Beamforming Method for PAF Receiver
TL;DR: In this article , the analog beamforming network composed of phase shifter and attenuator is applied to phase shift and phase attenuation in phase-modulated array (SFA) systems, and the relevant simulation is carried out.
Research on Expanding the Field of View of Phased Array Fee
TL;DR: In this paper , the authors compared the beam deviation angles and beam width under the two arrangement modes, and showed that 9×9 arranged PAF array will eventually expand the number of beams included in the telescope from 0.96-1.25 of 5×5 array to 1.54-2.9.
Proceedings ArticleDOI
Research on Expanding the Field of View of Phased Array Fee
TL;DR: In this article , the authors compared the beam deviation angles and beam width under the two arrangement modes, and showed that 9×9 arranged PAF array will eventually expand the number of beams included in the telescope from 0.96-1.25 of 5×5 array to 1.54-2.9.
References
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Sampling and reconstruction of wave-number-limited functions in N-dimensional euclidean spaces
TL;DR: The well-known Whittaker-Kotel'nikov-Shannon sampling theorem for frequency-bandlimited functions of time is extended to functions of multidimensional arguments and it is shown that a function whose spectrum is restricted to a finite region of wave-number space may be reconstructed from its samples taken over a periodic lattice having suitably small repetition vectors.
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Five hundred meter aperture spherical radio telescope (FAST)
TL;DR: The FAST project as discussed by the authors is the largest radio telescope in the world, with a five hundred meter aperture spherical radio telescope (FAST) and a light focus cabin driven by cables and servomechanism.
Journal ArticleDOI
Signal Processing for Phased Array Feeds in Radio Astronomical Telescopes
Brian D. Jeffs,Karl F. Warnick,Jonathan Landon,Jacob Waldron,David Jones,J. R. Fisher,Roger D. Norrod +6 more
TL;DR: A calibration and beamforming strategy for PAFs including interference mitigation with power spectral density (PSD) estimation bias correction and validated using numerical simulations and experimental data from a 19-element PAF on the Green Bank 20-m telescope is proposed.
Journal ArticleDOI
Interference mitigation using a focal plane array
TL;DR: In this paper, the performance of 7 and 19 element hexagonal dipole arrays with a 25 m reflector at an operating frequency of 1612 MHz was evaluated using the maximum SNR algorithm to generate array weights.