Made DIY Loop antenna for HF and it works amazingly with RTL-SDR in direct sampling mode : r/RTLSDR
Antenna suggestions – SDRplay
KrakenSDR | Crowd Supply
Using our new Dipole Antenna Kit
Amazon.com: RaTLSnake M6 v2 - Premium 3-Antenna Bundle for NESDR, RTL-SDR, HackRF, and Other Software Defined Radios. Magnetic Whip Antenna Set Made with Low-Loss RG58 Cable for Radios with 50 Ohm SMA
MageCrux 1PC 100KHz-1.8GHz RTL SDR Software Defined Radio Receiver HF SMA Antenna Connector - Walmart.com
Mini Whip Medium Short Wave SDR Antenna 9 15V RTL SDR Receiver Antenna USB to DC Cable Medium wave/short wave/ultra short wave| | - AliExpress
A Look Inside the RTL-SDR Kit (Software Defined Radio with Dipole Antenna Kit) | Elektor Magazine
South Eastern Communications
SDR Receiver with a Slinky Antenna
Con loop 0.1M-180MHz Active KIT ANTENNA RICEVENTE PER SDR RADIO K-180WLA | eBay
Telescopic antenna with MCX for RTL-SDR
Building an active wideband antenna for your SDR
Antenna Performance Comparison for the RTL-SDR
SDR Antennes choises
KrakenSDR | Crowd Supply
Can You Use a TV Arial as a SDR Antenna? - YouTube
Indoor SDR antenna Kit | eBay
Amazon.com: Bingfu Dual Band 978MHz 1090MHz 5dBi Magnetic Base SMA Male MCX Antenna for Aviation Dual Band 978MHz 1090MHz ADS-B Receiver RTL SDR Software Defined Radio USB Stick Dongle Tuner Receiver :