GigActiv GA3005 - Extreme Wideband Active Antenna - Bonito Hamradio
Amazon.com: Bingfu VHF UHF Ham Radio Police Scanner Antenna Amateur Radio Mobile Radio Scanner Antenna Magnetic Base BNC Male Antenna Compatible with Uniden Bearcat Whistler Radio Shack Police Scanner Ham Radio :
Scanner Receiving Antenna - MFJ-1022 HF Active - (300kHz To 200MHz) | eBay
Amazon.com: MFJ-1020C Indoor active antenna, HF : Electronics
Building an active wideband antenna for your SDR
Phased array - Wikipedia
TECHOMAN Scanner Radio Antenna SG-M507 VHF/UHF + Magnetic Mount – Techoman Electronics Ltd
WAN-97A Active Nomad Base Antenna | Scanner Master