Ideal diameter and length (or height) of cantenna for hydrogen line radio astronomy
For a hydrogen-line (1420.405 MHz) cantenna, the “ideal length” depends on which style of design you’re aiming for. A cantenna is really a short
Read moreastronomy.me.uk The Website of Lichfield Radio Astronomy Observatory (LRO)
Astronomy observatory in Staffordshire, England.
astronomy.me.uk The Website of Lichfield Radio Astronomy Observatory (LRO)
Astronomy observatory in Staffordshire, England.
Diameter and height of 2.5 litre paint tins in UK
Good question. In the UK, tins of paint come in a standard set of metric sizes. Here’s roughly how diameter
Read moreWhat is widest diameter that works effectively for making hydrogen line cantennas?
Widest usable diameter for a hydrogen-line cantenna For a round “cantenna” (a short section of circular waveguide) working at the
Read moreAccessible maser lines for amateur radio astronomers
For amateur-level radio astronomy, the most accessible astrophysical maser lines are those in frequency ranges where equipment is practical, affordable, and atmospheric
Read moreWR-137 Waveguide and Masers
WR-137 waveguide covers roughly 5.8–8.2 GHz, which puts you squarely in C-band.That is an excellent range for amateur radio astronomy, because it includes one
Read moreWR waveguide numbers and the frequency and wavelengths they cover for amateur adio astronomy projects
Here’s a practical WR waveguide reference table showing common WR numbers, their frequency range, and corresponding free-space wavelengths, and including a selection of sizes
Read moreDetecting masers associated an amateur radio astronomer
Amateur radio astronomers can indeed detect natural astrophysical masers, though the practical options are limited by sensitivity, equipment, and local regulations.
Read moreRound cantenna and square pyramidal horn calculators available online
Links to two useful calculators below (I have nothing to do with these websites): https://3g-aerial.biz/en/online-calculations/antenna-calculations/cantenna-online-calculator https://www.everythingrf.com/rf-calculators/pyramidal-horn-antenna-gain-calculator
Read moreCan I use a square coaxial to waveguide adapter to act as waveguide on my 1.5m dish for hydrogen line?
Short answer: Yes — but with caveats. A square/coax-to-waveguide adapter can act as a waveguide feed/aperture for a 1.5 m dish at the hydrogen
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