Mini‑Whip Active Antenna Radio Receiver Short RTL‑SDR Antenna Board Active Antenna Built-in Protection for Mobile Services: Amazon.co.uk: Electronics & Photo
Basic HF Mini Whip Antenna
Building the PA0RDT Mini-Whip – Radio Ramblings
G4NSJ – Mini-Whip Active Antenna HF LF VLF aerial Bias Tee | Radio Workshop
Does anyone have a schematic for one of these Chinese mini whip antenna clones? : r/amateurradio