Radio observation in hydrogen line (1420MHz)

Nooelec mesh antenna tuned to 1.4GHz for hydrogen line radio observing

This new antenna from Nooelec is tuned to 1.4GHz and designed for radio astronomy – currently not available on but is available on

Currently listed as “Nooelec Satellite Mesh Antenna Bundle for Inmarsat, Iridium, & Hydrogen Line Applications. 20dBi Parabolic Antenna w/ 1.4GHz Center Frequency, 300MHz+ Bandwidth. LMR400 SMA Feed Cable & Mounting Kit”

One of the members of the SARA mailing list has stated that he has been able to identify differences during drift scan every 5 degrees although the design of the antenna show give beamwidth of 20 degrees.

The following is from Amazon (not my assessment):

  • A reliable and high-quality mesh antenna set optimized to receive many L-band signals such as Inmarsat, Iridium, and Hydrogen Line (hydrogen’s natural frequency)
  • 20dBi antenna is perfect for L-band applications where the antenna is stationary. With a centre frequency of 1.4GHz and a bandwidth greater than 300MHz, it encompasses many popular satellite applications
  • Lightweight and durable design with high gain and low noise performance, ideal for outdoor applications such as satellite communication, remote sensing, and weather tracking
  • The antenna is equipped with a sub-reflector for enhanced performance and features an SMA termination for easy connectivity to existing radio equipment
  • The antenna is easy to assemble, and comes with an arm and coaxial cable attached to the arm for easy installation. Also included in the package is a versatile mounting kit that can be employed to cater to various installation situations


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