1. A wideband analog correlator system for AMiBA
- Author
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Chun-Hsien Lien, Ming-Tang Chen, Huei Wang, Chao-Te Li, Tzi-Dar Chiueh, Chia-Hsiang Yang, Chih-Chiang Han, Warwick Wilson, Ray-Ming Wei, Jeffrey B. Peterson, Derek Kubo, Michael Kesteven, and Chung Cheng Chen
- Subjects
business.industry ,Computer science ,Bandwidth (signal processing) ,Amplitude ,Data acquisition ,Hardware_INTEGRATEDCIRCUITS ,Electronic engineering ,Wideband ,Telecommunications ,business ,Field-programmable gate array ,Passband ,Data transmission ,Electronic circuit ,Diode - Abstract
A wideband correlator system with a bandwidth of 16 GHz or more is required for Array for Microwave Background Anisotropy (AMiBA) to achieve the sensitivity of 10μK in one hour of observation. Double-balanced diode mixers were used as multipliers in 4-lag correlator modules. Several wideband modules were developed for IF signal distribution between receivers and correlators. Correlator outputs were amplified, and digitized by voltage-to-frequency converters. Data acquisition circuits were designed using field programmable gate arrays (FPGA). Subsequent data transfer and control software were based on the configuration for Australia Telescope Compact Array. Transform matrix method will be adopted during calibration to take into account the phase and amplitude variations of analog devices across the passband.
- Published
- 2004