SETI Horn of Plenty (Hydrogen Line Pyramidal Horn Design Antenna)

Radio observation in hydrogen line (1420MHz) SETI Horn of Plenty (Hydrogen Line Pyramidal Horn Design Antenna)

How to build a horn antenna at 1420 MHz

Admin October 19, 2025 No Comments

Building a horn antenna tuned for the 21 cm (1420.405 MHz) hydrogen line is a popular and effective way to do amateur radio astronomy. A horn antenna is especially good…

Radio observation in hydrogen line (1420MHz) SETI Horn of Plenty (Hydrogen Line Pyramidal Horn Design Antenna)

WR-650 Waveguide

Admin October 18, 2025 No Comments

WR-650 already covers 1.12–1.70 GHz, so 1.420 GHz sits comfortably in-band—you don’t need to resize the guide. What you do need is a simple, well-tuned coax-to-waveguide probe with a backshort…

Radio observation in hydrogen line (1420MHz) SETI Horn of Plenty (Hydrogen Line Pyramidal Horn Design Antenna)

Dimensions of horn antenna for hydrogen line radio astronomy

Admin October 16, 2025 No Comments

Yes — the dimensions of a horn antenna really matter for hydrogen line (1420 MHz, λ ≈ 21 cm) observing. The horn’s shape sets its gain, beamwidth, and impedance match,…

Radio observation in hydrogen line (1420MHz) SETI Horn of Plenty (Hydrogen Line Pyramidal Horn Design Antenna)

Dipole vs radio dish or horn

Admin September 8, 2025 No Comments

If your “two cables joined in the middle, held aloft on poles with a single feed down the centre” is a centre-fed wire dipole / inverted-V style tuned to 1420…

How to build a horn antenna at 1420 MHz

WR-650 Waveguide

Dimensions of horn antenna for hydrogen line radio astronomy

Dipole vs radio dish or horn

You missed

Steps required to add Tensor Flow BXT to PixInsight – required by recent update

Maybe this is a stupid suggestion, but does all this mean that if users want the most accurate results they should keep their PicoMuon detectors in a fridge? And, if so, what would be the optimal temperature for the fridge to be set to?

Temperature response of UKRAA PicoMuon Muon Detector

The gain of a hydrogen horn or dish depends on its aperture which makes sense as bigger aperture means more light collected. But how does this work with a Yagi antenna tuned to hydrogen?