Backfire resonant quadrifilar helix antenna popular for GNSS,... | Download Scientific Diagram
SAT
QHF Quadrifilar APT Antenna
Weather satellite
Weather Satellite Antenna | WXSAT Antenna, Own Pictures
Antena QHA para satélites polares. (30STV)
Making a Quadri Filar Helix antenna - The DXZone.com
KE-137 QFH Antenna NOAA, ACARS 135/137 MHz
How To Build a Quadrifilar Helix Antenna for Weather Satellites - The DXZone.com
Receiving antenna choice - 2016 NOAA: receiving weather images
The Quadrifilar Helix Antenna - The DXZone.com
QFH Antenna and my first reception of NOAA! | Lets Hack It
QHF Quadrifilar APT Antenna
Weather Satellite Antenna | WXSAT Antenna, Own Pictures
My first try at receiving NOAA/Meteor at 137MHz. I am using a Nooelec NESDR SMArt v4 with a QFH antenna + Broadband LNA + SDR# using 26 meters (85 feet) of RG59
137MHz Turnstile Antenna - The DXZone.com
Just built myself a 137 MHz QFH antenna. : r/RTLSDR
HAM RADIO | Homebrew QFH antenna with APT-format transmission from NOAA 18 satellite, 518 miles up, and over New England | Facebook
RTL-SDR Second Attempt – Oakkar7, another Blog
Just built myself a 137 MHz QFH antenna. : r/RTLSDR
QFH antenna for NOAA Satellites - The DXZone.com
QHF Quadrifilar APT Antenna
