AMiBA宽带模拟关联函数
AMiBA Wideband Analog Correlator
摘要:
本文介绍了一种用于微波背景各向异性测量的宽带模拟关联函数。使用模拟乘法器的延迟消除器提供大带宽和中等频率分辨率。介绍了宽带中频分配、后端信号处理和控制。最佳灵敏度和线性的操作条件进行了讨论。从观测结果来看,大约10 GHz的大有效带宽已被证明可以提供足够的灵敏度来探测宇宙微波背景的变化。
英文摘要:
A wideband analog correlator has been constructed for the Yuan-Tseh Lee Array for Microwave Background Anisotropy. Lag correlators using analog multipliers provide large bandwidth and moderate frequency resolution. Broadband IF distribution, backend signal processing and control are described. Operating conditions for optimum sensitivity and linearity are discussed. From observations, a large effective bandwidth of around 10 GHz has been shown to provide sufficient sensitivity for detecting cosmic microwave background variations.
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