AMiBA Wideband Analog Correlator
Chao-Te Li (1), Derek Y. Kubo (1), Warwick Wilson (2), Kai-Yang Lin, (1,3), Ming-Tang Chen (1), P. T. P. Ho (1,4), Chung-Cheng Chen (1),, Chih-Chiang Han (1), Peter Oshiro (1), Pierre Martin-Cocher (1), Chia-Hao, Chang (1), Shu-Hao Chang (1), Pablo Altamirano (1)
TL;DR
This paper presents the design and implementation of a wideband analog correlator for microwave background observations, demonstrating its effectiveness in achieving high sensitivity with a 10 GHz bandwidth.
Contribution
It introduces a novel wideband analog correlator system optimized for microwave background measurements, including details on broadband distribution and signal processing.
Findings
Achieved an effective bandwidth of around 10 GHz.
Demonstrated sufficient sensitivity for detecting CMB variations.
Optimized operating conditions for sensitivity and linearity.
Abstract
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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