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The expanded very large array low band upgrade

机译:扩展的超大型阵列低频段升级

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The EVLA upgrade will enable full frequency coverage between 1 and 50 GHz. The legacy 74 and 330 MHz low frequency receivers have been largely decommissioned by compatibility issues with the new EVLA digital electronics. We describe an EVLA Low Band initiative to replace the existing narrow band receivers with a new low-noise, broadband system covering 66 to 470 MHz. The bandwidth at 74 MHz will increase by more than an order of magnitude while the 330 MHz bandwidth increases by a factor of 6. The initial deployment of the system will use the current, limited bandwidth feeds.
机译:EVLA升级将实现1至50 GHz的全频率覆盖。传统的74和330 MHz低频接收器由于与新EVLA数字电子产品的兼容性问题而在很大程度上退役。我们描述了一种EVLA低频段计划,该计划将以66至470 MHz的新型低噪声宽带系统取代现有的窄带接收机。 74 MHz的带宽将增加一个数量级以上,而330 MHz的带宽将增加6倍。系统的初始部署将使用当前有限的带宽馈送。

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