Development of a low-noise wide-band phased-array feed

Veidt, B.; Burgess, Tom; Messing, Rob; Hovey, Gary; Smegal, Rick

doi:10.1109/ursigass.2011.6123729

Cited by 2 publications

(2 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The presented LNA achieves lower noise figures than other discrete LNAs and therefore two such LNAs have been installed in one of the 7 Synthesis Telescope antennas operated by the Dominion Radio Astrophysical Observatory (DRAO), National Research Council of Canada. The same LNAs but on a slightly modified PCB have also been used in an Advanced Phased-Array Feed designed by DRAO [10,11].…”

Section: Measured Resultsmentioning

confidence: 99%

Wide-Band Two-Stage Gaas Lna for Radio Astronomy

Kulyk¹,

Ge²,

Belostotski³

et al. 2015

PIER C

View full text Add to dashboard Cite

Abstract-This paper presents the design, simulation and measurements of wideband two-stage LNAs using commercially available discrete components and targeting Square Kilometre Array (SKA) focalplane-array verification studies. The design optimization was implemented through simulations based on theoretical work that shows that low wide-band noise figures and power match are achievable by inner-stage component selection and device bias. In contrast to the conventional practice of having each stage of a discrete LNA matched to 50 Ω, the inner stage was designed with a mismatching capacitor between the two stages. The measured results are presented for 0.7-1.4 GHz and achieve noise figures below 0.4 dB, gain of at least 28 dB, mid-band input return loss of 7 dB, output P1 dB of 18.3 dBm, input-referred IP3 of −15.47 dBm, and power consumption of 500 mW with a supply voltage of 5 V.

show abstract

Section: Measured Resultsmentioning

confidence: 99%

Wide-Band Two-Stage Gaas Lna for Radio Astronomy

Kulyk¹,

Ge²,

Belostotski³

et al. 2015

PIER C

View full text Add to dashboard Cite

show abstract

“…Similar to discussions in Section V-A, numerical analysis was performed on a wide-band 41-element antenna array, known as Advanced Focal Array Demonstrator (AFAD) [41], [42], which is considered as a Square Kilometer Array phasedarray demonstrator [43] and is based on the design in [44]. In this array, the antenna spacing is designed to be half wavelength at 1.5 GHz.…”

Section: B 41-element Antenna Arraymentioning

confidence: 99%

Low-Noise Amplifier Design Considerations For Use in Antenna Arrays

Belostotski

Veidt

Warnick

et al. 2015

IEEE Trans. Antennas Propagat.

Self Cite

View full text Add to dashboard Cite

This work analyzes the implications of noise coupling in arrays of antennas on the design of low-noise amplifiers (LNAs). To select LNA design parameters in a manner familiar to LNA designers, the effective noise temperatures T ef f of LNAs are presented. The effect of beamformer coefficients and antenna coupling on T ef f is analyzed in a manner similar to a stand-alone LNA analysis. This leads to the proposed LNA design strategy of selecting LNA Γopt near the reflection coefficient of antenna ports and selecting the largest practical |S11| with a proper phase. This strategy is based on the assumption that the antenna array may be used for various beamforming and nonbeamforming applications, unknown at the time of the design. Numerical simulations of a 38-and 41-element antenna arrays show that a global search of LNA S11 and Γopt, which result in the minimum average beamequivalent receiver noise temperature Trec, finds nearly identical results to the proposed LNA design strategy. For a 41-element array with high antenna coupling at low frequencies, the proposed method shows as much as 80% improvement in the Trec over conventional LNA design strategies that do not account for the intended use of the amplifier in an array.

show abstract

Development of a low-noise wide-band phased-array feed

Cited by 2 publications

References 12 publications

Wide-Band Two-Stage Gaas Lna for Radio Astronomy

Wide-Band Two-Stage Gaas Lna for Radio Astronomy

Low-Noise Amplifier Design Considerations For Use in Antenna Arrays

Contact Info

Product

Resources

About