Active HF Customizable Loop Antenna for Portable Scanner Radio Receiver | eBay
actice loop hf antenna AL250W
TECHOMAN Scanner Radio Antenna SG-M507 VHF/UHF + Magnetic Mount – Techoman Electronics Ltd
Building an active wideband antenna for your SDR
Scanning/Receiving Antennas | Moonraker
Active HF Customizable Loop Antenna for Portable Scanner Radio Receiver | eBay
Phased array - Wikipedia
Amazon.com: MLA-30+ Loop Antenna, 100kHz-30MHz Active Receiving Antenna, Rainproof Loop Antenna for HA SDR Short Medium Wave Radio, with 10m Feeder,Built-in Low Noise Amplifier,for Rooftop,Balcony : Electronics
R&S®HE016 active antenna system | Rohde & Schwarz
Tecsun AN-48X Indoor Active Loop AM/LW/SW Radio Antenna - Main Trading Company
Simple Active antenna in SW/MW/FM bands - ElecCircuit
Cross Country Wireless Active Antenna
Scanner Receiving Antenna - MFJ-1022 HF Active - (300kHz To 200MHz) | eBay
Scanning/Receiving Antennas | Moonraker
GigActiv GA3005 - Extreme Wideband Active Antenna - Bonito Hamradio