Wideband Low-Loss Feed Design for the DSA-2000 Ambient Temperature Array in Radio Astronomy
Abstract
The Deep Synoptic Array (DSA-2000) is the next generation ground-based radio astronomical array that will consist of 2000×5 m reflectors equipped with an ambient temperature feed package and electronics covering 0.7-2 GHz. The quad-ridge choke horn (QRCH) feed developed for the DSA-2000 is a wideband, low-loss, and low-cost design providing a wide radiation pattern to illuminate the deep prime-focus reflector. We present the predicted noise temperature contributions for the feed, low-noise amplifiers, and surrounding brightness - resulting in a remarkable 25 K system noise at ambient temperature.
Copyright and License
© 2024, IEEE.
Acknowledgement
The author and project team would like to thank Schmidt Sciences for supporting and enabling the DSA-2000 and the Radio Camera Initiative project.
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Additional details
- Caltech groups
- Owens Valley Radio Observatory
- Publication Status
- Accepted