Beamforming and imaging with the BYU/NRAO L-band 19-element phased array feed

2009 13th International Symposium on Antenna Technology and Applied Electromagnetics and the Canadian Radio Science Meeting Pub Date : 2009-03-24 DOI:10.1109/ANTEMURSI.2009.4805125

K. Warnick, B. Jeffs, J. Landon, J. Waldron, D. Jones, J. Richard Fisher, R. Norrod

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引用次数: 39

Abstract

An experimental 19-element L-band phased array feed was installed on the Green Bank 20-Meter Telescope in October 2007 and July 2008 to measure sensitivity and effciency and demonstrate signal processing algorithms for array calibration, multiple beam formation, imaging, and adaptive spatial filtering methods for interference mitigation. System noise performance was characterized using a warm absorber/cold sky Y-factor setup. The peak beam aperture effciency was 69% and the minimum beam equivalent system temperature was 66K. With a single reflector pointing, a high sensitivity image of a field of view approximately two half-power beamwidths in diameter can be produced. Measured figures of merit compare well to numerical simulations, indicating that complicating effects such as mutual coupling are understood well enough to enable the next phase of array feed development to proceed on firm grounds.

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杨百翰大学/NRAO l波段19元相控阵馈源的波束形成和成像

2007年10月和2008年7月，在格林班克20米望远镜上安装了一个实验性的19元l波段相控阵馈源，以测量灵敏度和效率，并演示用于阵列校准、多波束形成、成像和自适应空间滤波的信号处理算法，以减缓干扰。采用热吸收体/冷天空y因子设置表征系统噪声性能。峰值光束孔径效率为69%，最小光束等效系统温度为66K。用一个单一的反射器指向，一个高灵敏度图像的视场大约两个半功率光束宽度的直径可以产生。实测数据与数值模拟结果相比较，表明对相互耦合等复杂效应的理解足以使下一阶段的阵列馈电开发能够在坚实的基础上进行。

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2009 13th International Symposium on Antenna Technology and Applied Electromagnetics and the Canadian Radio Science Meeting

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