Radio observation in hydrogen line (1420MHz) Waveguides

Calculations for WR-650 waveguides for hydrogen line radio astronomy

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Radio observation in hydrogen line (1420MHz)

What is the impedance of 1420 Mhz (1.42 GHz) [atomic neutral hydrogen line] dipole?

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LRO-H1 Radio Telescope (86cm x 86cm Ptarmigan Triffid 4x4 Dipole Array) Radio observation in hydrogen line (1420MHz)

Screenshot LRO-H1 data collection ezCol-py with RTL-SDR v3–23/1/2025@1240

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Easy Radio Astronomy Software (ezRA) LRO-H2 Radio Telescope (150cm Solar Cooker Dish) Radio observation in hydrogen line (1420MHz)

Hydrogen Line peak (H-Line, 1420 MHz) screen capture from ezCol.py capture software (part of ezRA suite) collecting data from a RTL-SDR Blog v3 Software Defined Radio on LRO-H2 radio telescope (150cm dish) on 22/1/2026

Radio observation in hydrogen line (1420MHz)

What is the impedance of 1420 Mhz (1.42 GHz) [atomic neutral hydrogen line] dipole?