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

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

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

It happens because “WR-650” means two completely different things depending on context, and most search engines don’t know which one

If you want a rectangular waveguide that works well around 1.4 GHz, a common standard choice is WR650. ✅ Why WR650 at ~1.4 GHz

Here’s a ready-to-use block diagram plus a practical minimal parts list and quick build/test checklist so you can turn your

Good questions. First, to be clear — by “convert … to a full waveguide” I assume you mean: you have