Design Study of an L-Band Phased Array Feed for Wide-Field Surveys and Vibration Compensation on FAST

Wu, Yue; Warnick, Karl F.; Jin, Chengjin

doi:10.1109/tap.2013.2254438

Cited by 14 publications

(9 citation statements)

References 12 publications

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“…The figure clearly shows that the radiation pattern from hexagonal array has sixfold symmetry which is very suitable for PAFs. Compared with a rectangular array, a hexagonal arrangement can achieve the same gain and sensitivity with fewer elements, which reduces the calculation of the beamformer [6]. Therefore, hexagon is chosen as the array arrangement of the FAST.…”

Section: Array Formationmentioning

confidence: 99%

“…Preliminary performance parameters for FAST are shown in Table 1. Figure 1 shows the geometric model of the reflector which is combined of paraboloid and spherical regions [6]. Nine groups of feed working together with the receiver cover a frequency range from 70 MHz to 3 GHz.…”

Section: Introductionmentioning

confidence: 99%

“…If hexagon is chosen as the array arrangement, can be calculated as (a) shows the sensitivity improvement over field of view with increasing elements at 1.25 GHz. If the edge of the field of view is defined as 1 dB or 20% maximum acceptable sensitivity loss position[6], 9 or more rings of feeds ( ≥ 9) should be employed to achieve the requirement of 0.6 * 0.6 deg 2 field of view, which equals 5.36 * 5.36 HPBW 2 . Taking Journal of Antennas and Propagation…”

mentioning

confidence: 99%

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Design of an L-Band Cross-Dipole Phased Array Feed for FAST

Han

Zhong

2016

International Journal of Antennas and Propagation

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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.

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Section: Array Formationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 99%

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Design of an L-Band Cross-Dipole Phased Array Feed for FAST

Han

Zhong

2016

International Journal of Antennas and Propagation

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“…Conformal antenna arrays are beneficial for applications that need an antenna to be placed on a non-flat surface, for example, on the fuselage of a UAV/airplane in the aerospace industry [1][2][3], implantable sensors in wearable networks [4][5][6][7][8], and satellite communications [9][10][11]. One of the main advantages of using conformal antenna is its structural integration ability on singly curved (e.g., a wedge/cylinder) [12][13][14][15] and doubly curved (like a sphere) surfaces [16].…”

Section: Introductionmentioning

confidence: 99%

Broadside Pattern Correction Techniques for Conformal Antenna Arrays

Ullah¹,

Khattak²,

Braaten³

2020

Advances in Array Optimization

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Phase compensation techniques based on projection method and convex optimization (phase correction only) for comparing the maximum gain of a phase-compensated conformal antenna array have been discussed. In particular, these techniques are validated with conformal phased array antenna attached to a cylindrical-shaped surface with various radii of curvatures. These phase compensation techniques are used to correct the broadside radiation pattern. It is shown that the maximum broadside gain compensated is still less than the gain of a linear flat array for any surface deformation. This fundamental maximum compensated gain limitations of the phase compensation techniques can be used by a designer to predict the maximum broadside obtainable theoretical gain on a conformal antenna array for a particular deformed surface.

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“…There are also plans to use them in number of other radiotelescopes including the Arecibo 300 m [3], the Parkes 64 m, the Effelsberg 100 m, the Robert C. Byrd Green Bank Telescope (GBT) 100 m and the Square Kilometre Array (SKA). There are active research programs in the field by these and other groups, such as Brigham Young University and NRAO [4], DRAO [5] in Canada and NAOC in China [6].…”

Section: Introductionmentioning

confidence: 99%

Measuring radiotelescope phased array feed noise and sensitivity

Hayman

Chippendale

Hotan

et al. 2014

The 8th European Conference on Antennas and Propagation (EuCAP 2014)

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Various challenges have arisen in the measurement of phased array feeds for radiotelescopes. We focus here on measuring the equivalent noise temperature and the sensitivity of these feeds. We outline the differences between characterizing phased array feeds compared with traditional single horn feeds and provide results from our experience in developing phased array feeds for the Australian Square Kilometre Array Pathfinder.Index Terms-active arrays, antenna array feeds, phased array feeds, focal plane arrays, antenna measurements, radio astronomy, measurement.

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Design Study of an L-Band Phased Array Feed for Wide-Field Surveys and Vibration Compensation on FAST

Cited by 14 publications

References 12 publications

Design of an L-Band Cross-Dipole Phased Array Feed for FAST

Design of an L-Band Cross-Dipole Phased Array Feed for FAST

Broadside Pattern Correction Techniques for Conformal Antenna Arrays

Measuring radiotelescope phased array feed noise and sensitivity

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